Abstract: The device (1) for bringing a gas and a liquid into contact includes an enclosure (E), first means (5) for introducing into the enclosure and circulating therein a gas stream (G), second means (6) for introducing into the enclosure and circulating therein a liquid stream (L) that circulates inside the enclosure (E) in the same direction as the gas stream (G), and means (4A) for mixing the gas stream (G) and the liquid stream (L). These mixing means (4A) are positioned inside the enclosure (E) in the path of the gas stream and liquid stream and are capable of locally deflecting upward, and/or of locally causing to rise, at least one portion of the gas stream and liquid stream, so as to locally create turbulences in the gas stream and in the liquid stream.

Abstract: A backwash filtration system comprising a backwash discharge port, a sedimentation collection and separation system, and a final filtration chamber. The backwash discharge port is coupled with a pool filter system and is configured to pass backwashed water from the pool filter system to the sedimentation collection and separation system. The sedimentation collection and separation system has a plurality of sedimentation chambers that are vertically stacked and a plurality of baffles configured to reduce the migration of sediment within the sedimentation chambers. A path for water flow passes down sequentially through each of the sedimentation chambers. The final filtration chamber receives the backwashed water from the sedimentation collection and separation system, filters the backwashed water through a final filtration medium, and passes the filtered water to a water return line of the pool filter system or to a pool of water.

Abstract: An in-situ thermal remediation method and a drip system for implementing the method. The drip water system collects data and changes its drip operation to optimize performance of the electrode. Electrical current, drip volume, drip cycle time and change in current are measured as a function of time and adjustments are made to the drip water volume and time between injections to optimize performance based on the observed current performance over time. A specialized screen delivers water where it is needed.

Abstract: A wastewater treatment system includes a plurality of reaction tanks, a blowing pipe, a blower unit, and an air supply amount controller. The air supply amount controller includes: a water quality measurement unit configured to measure a state of wastewater; a necessary air amount acquisition unit configured to acquire, a necessary air amount for achieving a predetermined target water quality of wastewater; a target in-pipe pressure calculation unit configured to calculate a blowing pipe loss pressure when the necessary amount of air is supplied into the blowing pipe, calculate a target in-pipe pressure based on the blowing pipe loss pressure, and change the calculated target in-pipe pressure in accordance with change of the necessary air amount; and a blowing control unit configured to control air supply from the blower unit so that the pressure in the blowing pipe becomes equal to the target in-pipe pressure.

Abstract: An oil dehydrator, comprising; a vacuum chamber, a vacuum pump arranged at an upper end region of the vacuum chamber for establishing a negative pressure within the vacuum chamber and for fluid transportation of water and air out from the vacuum chamber through an outlet opening, and a pipe for fluid transportation of oil into and/or out from the vacuum chamber, where the pipe is connected to a lower end region of the vacuum chamber, wherein the vacuum chamber at the lower end region has at least one flow channel fluidly connecting the vacuum chamber and the pipe, wherein an orifice check valve is arranged between the vacuum chamber and the pipe for controlling the flow of oil into and out from the vacuum chamber through the at least one flow channel.

Abstract: The invention provides structures, methods, and assemblies for bioretention systems, including tree box filters with one or more internal bypass features incorporated into the tree box filter. The invention also provides methods and additional structures that are useful for managing stormwater flow and inhibiting the flow of pollutants, debris, and other contaminants into drainage systems.

Abstract: The invention in one form is directed to an airlift pump that is optimized to transfer large volumes of water using very low pumping head. Specifically, the airlift pump is comprised of a pump inlet and outlet which are both located below pond's surface. The pumping force driving the water flow is supplied by the weight of the volume of water displaced by pressurized air into a vertical pipe, and this energy is dissipated by the friction of the rising bubbles pipe entrance head, plus the frictional effects of the inner pipe wall and the energy contained in the water's exit velocity.

Abstract: An apparatus for controlling the taste of coffee, a method of controlling the taste of coffee and a coffee maker including the apparatus. The apparatus includes a control unit, configured to determine a target pH value of water corresponding to a desired coffee taste, and a corresponding adjustment control signal; and a pH adjustment unit, configured to adjust, in response to the adjustment control signal applied to the pH adjustment unit, the pH value of water to be fed into a brewing unit of a coffee maker to the target pH value. In accordance with embodiments of the present disclosure, the pH value of water to be fed to a brewing unit of a coffee maker may be adjusted for a desired coffee taste.

Abstract: A dual-action water aerator includes structure that generates fine, fizz-type bubbles and structure that generates larger, more roiling bubbles that cause circulation within a body of water in which the aerator is submerged. The disclosed embodiments include a ring-shaped hub with a central aperture, with a central tube extending axially from the aperture. A number of fine-bubble-producing members extend outwardly from the hub and may be attached to the hub using a twist-lock connection designed to facilitate rapid assembly and deployment of the aerator. An internal air chase extends circumferentially around the aperture. A portion of air supplied to the air chase flows into the fine-bubble-producing members and fizzes out through the members, and another portion of air that is supplied to the air chase flows into the central tube and bubbles up out of the tube in a roiling manner to cause circulation in the body of water.

Abstract: Decomposing waste material may use a no-turn, aerobic composting apparatus that includes an enclosure for containing waste material and a fluid distribution system including a fluid injection member removably disposable in waste material disposed in the enclosure. The fluid injection member includes a plurality of spaced apertures for injecting fluid into the waste material.

Abstract: The invention relates to an aeration system for seawater oxidation in flue gas purification devices, with at least one tubular diffuser (TD), covered by at least two perforated membranes (20), which are positioned one after the other and at a distance to each other in a direction of the central longitudinal axis (A) of the diffuser (TD) as well as at least one support member (SP), which encircles a membrane-free section (FS) of the tubular diffuser at least partially, and at least one sliding means (40), arranged between the support member (SP) and the membrane-free section (FS) of the tubular diffuser (TD).

Abstract: A pivotal rigid vortex shield configured for use in combination with a propeller-type aerator has a vortex shield, and a rigid support affixing the vortex shield to a support system. The support has a horizontal support bar with at least two cross arches, first and second vertical pivot and locking members, and a top arch affixed between. A pintle couples the support to vortex shield, and defines a pivotal axis about which the vortex shield is configured to rotate. A locking member may be at least one quick release pin that in an operational configuration simultaneously passes through at least a portion of at least one of the vertical pivot and locking members and at least a portion of the vortex shield support to prevent rotation of the vortex shield about the pintle. In a service configuration the pin is removed to permit the vortex shield to rotate.

Abstract: A method of air scouring an immersed membrane is described in this specification. The method comprising a step of adjusting one or more aeration parameters: between successive permeation, back pulse or relaxation cycles; during a permeation cycle; or, between a permeation cycle and a backpulse or relaxation cycle.

Abstract: A membrane filtration system and a membrane bio reactor including the same are described. In an example, the membrane filtration system includes: a treatment tank; a membrane support frame disposed in the treatment tank and mounted with a separation membrane; a separation membrane module mounted on the membrane support frame; a vane member disposed at a lower end of the membrane support frame and provided to lift sludge accumulated at a lower part of the treatment tank; and a reciprocating portion connected to the membrane support frame and reciprocating the membrane support frame, in which the separation membrane module includes an upper frame and a lower frame and a hollow fiber membrane installed between the upper frame and the lower frame.

Abstract: A membrane filter module configured to treat a liquid contained in a tank at an ambient pressure. The module may have a header, with a bundle containing a plurality of substantially vertical hollow fiber membranes, wherein a lower end of each hollow fiber membrane is fixed in the header. The module may also have a gasification device adapted to periodically generate a gaseous bubble and configured to release the gaseous bubble within the bundle. The module may further have an enclosure that substantially surrounds the bundle that extends from a lower region to an upper region of the membrane bundle, wherein the enclosure is configured to retain the liquid introduced into the enclosure such that the liquid surrounds the membrane bundle. The gaseous bubble has a cross-sectional area that corresponds with a cross-sectional area of the enclosure, such that the cross-sectional area of the gaseous bubble occupies substantially the entire cross-sectional area of the enclosure as it flows along the bundle.

Abstract: The efficiency of water disinfection can be significantly increased by supplying the ozone in combination with oxygen to an inlet of a cavitation pump. The ozone and the oxygen are turned into ultra-fine bubbles via cavitation action within the pump, facilitating the dissolution of the oxygen and ozone within the water. The water mixed with the oxygen and the ozone is subsequently supplied to a line atomizer, where the dissolution of the ozone within the mixture is completed. The combined use of the cavitation pump and the line atomizer can lead to a substantially complete dissolution of the supplied ozone within water that needs to be disinfected, allowing to easily achieve the concentration of ozone necessary for water disinfection. Due to this efficiency, the system and method described are highly scalable and suitable for water purification at water purification plants of various sizes.

Abstract: A membrane filtration system, capable of effectively removing foreign matter attached to a separation membrane while saving energy by reciprocating the separation membrane, includes a treatment bath, a membrane support frame disposed in the treatment bath, a separation membrane module installed in the membrane support frame, a reciprocating part connected with the membrane support frame to reciprocate the membrane support frame, and a sludge floating part disposed on a lower end of the membrane support frame to float sludge accumulated in the treatment bath, and a filtered-water discharge part discharging filtered water that has been filtered via the separation membrane module. The filtered-water discharge part is formed to be movable or stretchable in response to a reciprocating motion of the membrane support frame.

Abstract: A membrane filtration system, capable of effectively removing foreign matter attached to a separation membrane while saving energy by reciprocating the separation membrane, includes a treatment bath, a membrane support frame disposed in the treatment bath, a separation membrane module installed in the membrane support frame, a reciprocating part connected with the membrane support frame to reciprocate the membrane support frame, a sludge floating part disposed on a lower end of the membrane support frame to float sludge accumulated in the treatment bath, and a control part controlling a reciprocating distance or frequency of the separation membrane module.

Abstract: A membrane filtration system, capable of effectively removing foreign matter attached to a separation membrane while saving energy by reciprocating the separation membrane, includes a treatment bath, a membrane support frame disposed in the treatment bath, a separation membrane module installed in the membrane support frame, a reciprocating part connected with the membrane support frame to reciprocate the membrane support frame, and a sludge floating part disposed on a lower end of the membrane support frame to float sludge accumulated in the treatment bath. The separation membrane module includes an upper frame, a lower frame, and a hollow fiber membrane provided between the upper frame and the lower frame.

Abstract: Disclosed is a sequencing batch reactor (SBR) for sewage treatment. The SBR is applicable to an energy-producing sewage treatment system. The SBR includes a treatment tank and a hybrid bacterial strain screening tank. The treatment tank removes ammonium contained in supernatant liquid using anaerobic ammonium-oxidizing (anammox) bacteria. The hybrid bacterial strain screening tank screen anammox bacteria granules out by passing the supernatant liquid discharged from the treatment tank through the hybrid bacterial strain screening tank. The SBR generates biogas using the anammox bacteria and reduces the nitrogen content in the supernatant liquid. The SBR can separate the anammox bacteria granules with high separation efficiency, thereby shortening sewage treatment time and recycling activated sludge, resulting in a dramatic decrease in the amount of waste sludge.

Abstract: A wastewater reclamation apparatus and wastewater-recycling washing equipment including the same includes: a reclamation tank configured such that a wastewater intake tube is connected to the lower portion thereof so that wastewater discharged from an external apparatus enters thereinto and is stored therein, a vapor supply tube is connected to the upper portion thereof so that the stored wastewater is heated and then supplied in a vapor form back into used water inside the external apparatus, and a wastewater inflow pump is provided on the wastewater intake tube; a heater provided in the reclamation tank, and configured to heat the wastewater; and a waste sludge discharge assembly provided below the reclamation tank so that deposited wastewater sludge is discharged to the outside.

Abstract: A membrane filtration system and a membrane bio reactor including the same are described. In an example, the membrane filtration system includes: a treatment tank; a membrane support frame disposed in the treatment tank and mounted with a separation membrane; a separation membrane module mounted on the membrane support frame; a vane member disposed at a lower end of the membrane support frame and provided to lift sludge accumulated at a lower part of the treatment tank; and a reciprocating portion connected to the membrane support frame and reciprocating the membrane support frame, in which the separation membrane module includes an upper frame and a lower frame and a hollow fiber membrane installed between the upper frame and the lower frame.

Abstract: The present disclosure provides a water treatment module, a bioreactor comprising one or more of such modules and a receptive water treatment system. Also provided herein is a method making use of the above module, bioreactor and system. The water treatment module comprises (i) at least one elongated gas enclosure comprising a gas inlet and two vertical walls, at least one vertical wall comprising a water-impermeable and gas-permeable membrane having a water-facing side and a gas-facing side, the two vertical walls separating between water external to said enclosure and gas within said enclosure, the gas enclosure being in a rolled or folded configuration to thereby define a convoluted horizontal path and one or more water-treatment spaces formed between opposite water facing sides of the enclosure; and (ii) a diffuser arrangement comprising gas diffusers configured for introducing a stream of gas into the one or more water treatment spaces.

Abstract: A membrane filtration system and a membrane bio reactor including the same are described. In an example, the membrane filtration system includes: a treatment tank; a membrane support frame disposed in the treatment tank and mounted with a filtration membrane; a reciprocating portion connected to the membrane support frame and reciprocating the membrane support frame; a sliding portion disposed in the treatment tank, connected to the reciprocating portion, and guiding a moving direction of the membrane support frame; and a sludge lifting portion flexibly disposed at a lower end of the membrane support frame to lift sludge accumulated at a lower part of the treatment tank.

Abstract: Embodiments described methods, systems and apparatuses to utilize a plurality of membrane cartridges and a housing frame comprising a lightweight corrosion resistant material (e.g., non-corrosive metals, non-corrosive composites such as PVC, HDPE and FRP). The anti-corrosive properties of said frame allow of it to be re-used (e.g., with replaced MBR filters). Said MBR frame may be used in a single function or multi-function wastewater treatment container. Said container may also include a corrosion resistant liner coupled to interior portions of each of the base and side walls of the basin, an inlet to receive wastewater treatment influent into the basin, and an outlet to output wastewater treatment process material from the basin.

Abstract: A method of providing at least two outlet purified water streams from a water purification system by providing a first purified water into a first reservoir able to provide an outlet purified water stream. At least a portion of the first purified water is passed from the first reservoir through a water purification process to provide an ultra-purified water stream. The ultra-purified water stream is passed to a second reservoir. An excess of ultra-purified water is provided into the second reservoir beyond a pre-determined quantity, The excess ultra-purified water in the second reservoir is allowed to flow from the second reservoir into the first reservoir. An outlet from the water purification system of an ultra-purified water stream is provided from the second reservoir.

Abstract: A media bed reactor may be used to remove selenium from water. An exemplary reactor has a fluid injection system with one or more outlets located within the media bed. The fluid injection system may be connected to a source of gas, liquid or both. In a selenium treatment process, a denitrification zone forms above a selenium-reducing zone in the media bed. Operation of the reactor includes a step of flowing a fluid upwards through only an upper part of the bed. This upper part of the bed preferably contains at least most of the denitrification zone.

Abstract: Described herein are systems and methods for treatment of contaminated water employing a mobile supported biofilm. The treatment systems include a bioreactor, a mobile biofilm disposed within the bioreactor, and a solid-solid separation unit attached to the bioreactor. The solid-solid separation unit is adapted to receive an effluent stream from the bioreactor, wherein the effluent contains the mobile biofilm, and separate at least a portion of the mobile biofilm from the effluent and return it to the bioreactor.

Abstract: A water treatment tank is constructed from several adjoining intermodal containers (ICs). The adjoining ICs are angularly disposed relative to each other so as to surround a tank area. Each IC has a reinforced sidewall defining a tank wall or tank wall part. A bracing structure is attached to ICs end walls at each junction between adjoining ICs. The tank having a liner supported at the sidewalls and covering the ground at the tank area.

Abstract: Systems, devices, and methods for the delivery of gas bubbles to liquids are generally described. The devices can include a primary conduit comprising a plurality of openings fluidically connecting an internal flow pathway of the primary conduit to an environment outside the primary conduit. The devices may also include, in some instances, a secondary conduit located at least partially within the primary conduit, the secondary conduit configured to redistribute the pressure of the gas delivered to the openings of the primary conduit, and comprising a plurality of openings fluidically connecting an internal flow pathway of the secondary conduit to a portion of the internal flow pathway of the primary conduit outside the secondary conduit. Certain of the gas delivery systems and methods described herein are capable of delivering gas at relatively uniform linear flow velocities across multiple gas outlet openings. Certain embodiments are related to inventive configurations (e.g.

Abstract: Decomposing waste material may use a no-turn, aerobic composting apparatus that includes an enclosure for containing waste material and a fluid distribution system including a fluid injection member removably disposable in waste material disposed in the enclosure. The fluid injection member includes a plurality of spaced apertures for injecting fluid into the waste material.

Abstract: The invention relates to a horizontal agitator for producing a flow in a clarifier, a submersible motor (1) and a propeller (3) drivingly connected thereto forming an assembly unit (M), wherein a receiving portion (A) for removably attaching the assembly unit (M) is provided and can be supported on the bottom (Bo) of the clarifier, and wherein a guide for guiding the assembly unit (M) along a substantially vertical movement path between a surfacing position above a maximum nominal sewage level (N) defined for the clarifier and the receiving portion (A) is provided. In order to improve the efficiency of the horizontal agitator and to reduce complexity of manufacture, the guide is formed by at least one first cable (S) extending between the surfacing position and the receiving portion (A).

Abstract: A system and method for capture of ammonia and phosphorus from an ammonia and phosphorus containing liquid effluent. The invention allows for the precipitation of phosphorus from said liquid effluent that has been under low aeration and has a pH of greater than about pH 9.

Abstract: In a submerged membrane bioreactor (MBR or SMU), diffusers are used to eject air bubbles, primarily to facilitate the movement of mixed liquor past the membrane surfaces, cleaning and scouring the surfaces of the membranes with the mechanical energy of the combined air/liquid/solids movement. Oxygen transfer from the bubbles into the mixed liquor is often a secondary goal, for supplying oxygen to biological processes. The invention involves the use of a specific bubble diffuser, oriented at a selected upward angle, to enable a single style diffuser to accomplish simultaneous generation of mid-size and fine bubble aeration, with adjustment of the tilt angle varying the percentages of mid-size and fine bubble aeration. The angle selection, along with the number of diffusers and air volume selected, allows achievement of target liquid movement through the MBR.

Abstract: Disclosed is an aeration unit capable of cleaning all the hollow fiber membranes in a filtering apparatus sufficiently and uniformly thereby improving the filtration efficiency and a filtering apparatus comprising the same. An aeration unit of the present invention comprises a plurality of aeration tubes parallel to each other, each of the aeration tubes comprising a first end and a second end opposite the first end; and a first common pipe in fluid communication with the aeration tubes through the first ends of the aeration tubes to provide the aeration tubes with air. The first common pipe is perpendicular to the aeration tubes. The closer to both ends of the first common pipe the aeration tubes are, the more densely the aeration tubes are arranged.

Abstract: Embodiments of a process for treating a fluid are provided. The process for treating a fluid includes supplying a first fluid to a circulating chamber and introducing a first gas to the first fluid. A portion of the first gas is dissolved in the first fluid and a portion of the first gas is held in a head space portion of the circulating chamber. The process further includes mixing a portion of the first fluid drawn out from the circulating chamber and a portion of the first gas drawn out from the head space portion to form a mixture. The process further includes spraying the mixture back into the circulating chamber by a two-fluid nozzle. In addition, the first gas is further dissolved into the first fluid to form a high conductivity fluid. The process further includes draining the high conductivity fluid from the circulating chamber.

Abstract: Processes for starting up and operating anaerobic, deep tank fermentation systems to anaerobically bioconvert hydrogen and carbon monoxide in a gaseous substrate stream to oxygenated organic compounds and for steady operation of such fermentation systems are shown. Injectors use a motive liquid to introduce gas substrate as a stable gas-in liquid dispersion into the deep tank fermentation reactor where at least one of: (i) adjusting the gas to liquid flow ratio through an injector, (ii) changing the rate of liquid flow through an injector, and (iii) adjusting the carbon monoxide mole fraction in the gas feed by admixture with at least one other gas, wherein the mass transfer of carbon monoxide to an aqueous menstruum in the reactor is controlled to obtain the robust growth of the microorganism and/or continued conversion of gas substrate while maintaining the carbon monoxide concentration below that amount which is unduly adverse to the microorganism.

Abstract: An air diffusion device is provided. The device includes a base coupled to an air supply pipe for supply of air. The base has an air discharge hole for discharge of air supplied from the air supply pipe. The device further includes a perforated cover in the form of a multi-layered stepped plate the height of which is reduced stepwise from the center to the edge. The perforated cover has a plurality of through-holes for discharge of air, and it is coupled to an upper surface of the base to cover the air discharge hole, thus defining an air guide chamber between the perforated cover and the base. The device further includes a securing mechanism configured to secure the perforated cover to the base.

Abstract: A first fixing member which fixes to a membrane module unit a tubular member with a protrusion formed at a tip end or near the tip end for connecting a membrane module of the membrane module unit and a water collecting header to form a filtrate flow path from the membrane module to the water collecting header, the first fixing member includes: a fixing member main body which includes an engaging surface formed at a position at which the fixing member main body engages with the protrusion formed in the tubular member; and a second fixing member which fixes the fixing member main body to the membrane module unit.

Abstract: An apparatus comprises a distribution conduit, a diffuser body, and an insert. The distribution conduit defines an aperture. The diffuser body defines a mating tube, at least a portion of the mating tube passing through the aperture, and the mating tube defining a mating tube passage therethrough with an inside sidewall. The insert is at least partially disposed in the mating tube passage and presses against the inside sidewall so as to cause the mating tube to expand. Removal of the mating tube from the distribution conduit is thereby inhibited.

Abstract: A mixing apparatus in the form of an aerator for location within a body of water to be remediated by oxygenating the water, including an inlet through which water is pumped into the aerator, the inlet includes a branched distributor in which the inlet divides into four equal branches for forming four equal flow paths for the water. Each of the four equal pathways is provided with an air injector in the form of a venturi for introducing air into the water flow path in order to aerate the water. The advantage of the aerator is that the distributor is designed to have balanced flow so that equal flows of water pass through each flow path to introduce equal volumes of air, which increases the efficiency of the aerator. Forms of the aerator can have two or more distributors in which all individual flow paths are substantially equal to improve the efficiency of the aerator.

Abstract: A method and apparatus for the treatment of water with a gas or nutrient infused liquid. One embodiment delivers an oxidized water supply to a wastewater digester medium by means of pure oxygen introduced to the water supply via a pressure vessel or other means to infuse the liquid. This oxygen infused liquid is delivered to the medium to be treated at a critically controlled depth via a surface float delivery system. The invention involves delivering the oxygen infused liquid via nozzles which are located strategically in the supernatant allowing an extended oxygen-water interface time without over oxidizing the sludge blanket below.

Abstract: A gas sparger produces an intermittent flow of bubbles even if provided with a continuous gas flow. The sparger has a housing to collect a pocket of gas and a conduit to release some of the gas from the pocket when the pocket reaches a sufficient size. The housing is integrated with the potting head of a module. The conduit passes through the potting head.

Abstract: An air stripper includes a vessel, a gas delivery tube to deliver a gas into the vessel and a contaminated liquid inlet that provides a contaminated liquid to the vessel at a rate sufficient to maintain a controlled constant level of process fluid within the vessel. A weir is disposed within the vessel adjacent the gas delivery tube to form a first fluid circulation path between a first weir end and a wall of the vessel and a second fluid circulation path between a second weir end and an upper end of the vessel. During operation, gas introduced through the tube mixes with the process fluid and the combined gas and fluid flow at a high rate with a high degree of turbulence along the first and second circulation paths defined around the weir, thereby promoting vigorous mixing and intimate contact between the gas and the process fluid.

Abstract: An oily water separator for removing oil from oil-containing water, including a vessel, a filtration membrane unit and a discharge mechanism; the filtration membrane unit containing a filtration membrane module and a returning mechanism, the filtration membrane module for performing filtration in the state of allowing the module to be immersed into the oil-containing water; the filtration membrane module having an elongated filtration membrane with an opening portion, the opening portion of the filtration membrane being fixed to one end of the filtration membrane module, the opening portion of the filtration membrane being communicatively connected to the returning mechanism; the returning mechanism being extended along the filtration membrane toward an end on a side opposite to an end portion having the opening portion thereof, the returning mechanism being communicatively connected with the discharge mechanism.

Abstract: A water filter-pitcher includes a water pitcher with at least two chambers separated by at least one filter, and an ozone generator to generate ozone for sanitizing at least internal surfaces of said two chambers.

Abstract: A membrane supported biofilm apparatus has a plurality of hollow fiber gas permeable membranes in a tank containing water to be treated. A biofilm supported on the membranes occupies between about 40% and 80% of the volume of water to be treated in a reactor. Wastewater treatment processes are described. A process to denitrify water or treat oxidized contaminants comprises introducing hydrogen into an inner volume of the membranes to grow autotrophic organisms in the biofilm near the membrane and heterotrophic organism near the water. Another process is operated as a biomass concentration of at least 10 g/L and up to about 40 g/L to maintain a biofilm having a surface area of over 1000 square meters per cubic meter of tank volume. A hybrid process has suspended biomass and a membrane supported biofilm.

Abstract: A system and method includes an aeration subsystem that excites enzymes in the liquid waste passing through the septic system. The aeration subsystem includes a compressor section that compresses the liquid waste. The method includes mixing enzymes into the fluid waste material, compressing the fluid waste material with the compressor, injecting air into the compressed fluid waste material, and determining whether the fluid waste material is at a desired cleanliness, and if not, recirculating the fluid waste material through the compressor.

Abstract: A method and system for controlling dissolved oxygen levels in a secondary treatment system of a wastewater treatment facility that can employ a membrane bioreactor in which oxygen introduction into mixed liquor is controlled to prevent bulking and minimize generation of extra cellular polymeric substances. The control is exercised by insuring that dissolved oxygen levels within the mixed liquor do not fall below a minimum system level at which microorganism stress would occur. This is done by setting a minimum dissolved oxygen level control point equal to a sum of the minimum system level and an adjustment factor determined on the basis of oxygen uptake rate and time delays inherent in sensing oxygen levels and changes thereof within the mixed liquor. The minimum system dissolved oxygen level can be continually calculated on the basis of an inferred food to mass ratio that would vary with sensed mixed liquor suspended solids.

Abstract: The present invention provides an aeration lateral system designed to be site specific for new septic disposal areas or retro fitting to existing septic disposal areas to break up the biological clogging sludge mat at the interface of the wastewater and imported sand or native soil fill under or adjacent to disposal areas of a typical septic system. The lateral system provides uniform or other site specific distribution of fluids about the bio-mat of a wastewater disposal area, with lateral spacing and hole spacing varying based on the type of disposal area being utilized. The lateral system can also be utilized to provide continuous low volume air supply system to a wastewater disposal area or peat filter module. The air lateral installation includes methods to minimize airflow disturbance of the soil and methods to prevent air leakage.