Abstract: An apparatus having a layer of fats, oils and grease (F.O.G) on water includes a tank having an inlet and an outlet. The inlet connects to a source of F.O.G.-laden effluent and the outlet connects to a sewer pipe so that the outlet defines a normal static water level for F.O.G. and effluent in the tank. A sensor mounted above the static water level determines a distance from the sensor to a top of F.O.G. within the tank, so that a thickness of the F.O.G. in the tank can be determined. If the sensor is LIDAR, sensing may be at about 940 nm. When the F.O.G. is sensed to be above a threshold, the apparatus generates signals to remove the F.O.G. Ultrasonic sensing may be used. Preferably, the sensor is mounted far enough above the static water level so the distance between the sensor and the liquid surface is filled with air. More preferably, the sensor is far enough above the static water level so that the top of the F.O.G. does not touch the sensor even as the top of the F.O.G.

Abstract: A grease trap or solids collector for separating waste from waste water has a tank having a multilayer outer wall made of an outer layer of un-foamed plastic, an intermediate layer of foamed plastic, and an inner layer of unfoamed plastic; an inlet invert in the tank for receiving incoming waste water; and an outlet invert for removing water from the tank. An extension collar made up of segments can be included.

Abstract: Storage tanks, for example, underground septic tanks, and their methods of fabrication are provided. The tanks include a substantially liquid impermeable plastic vessel having a top, a bottom, and sides; a concrete container encasing and retaining the plastic vessel, the concrete container contacting the bottom and at least partially contacting the sides of the plastic vessel; and at least one opening for receiving effluent, for example, waste effluent, into the plastic vessel. The methods of fabricating the tanks include positioning a plastic vessel into an enclosure; introducing concrete into the enclosure about the plastic vessel; allowing the fluid concrete to cure to provide a substantially solid concrete container about the plastic vessel; and removing the plastic vessel having a concrete container from the enclosure. Vessel shape retaining devices are also disclosed. Aspects of the invention are uniquely adapted to underground storage.

Abstract: Provided is a water-purification cartridge to be replaceably accommodated in an accommodating portion of a water purifier. The cartridge includes activated carbon that removes impurities from water, forms, within the water purifier, a raw water flow path through which raw water flows downstream without passing through the activated carbon and a water purification flow path through which raw water flows downstream while passing through the activated carbon, and further includes a buffer portion that is disposed, within the water purifier, at a position upstream of flow path switching valves for selecting discharge from the raw water flow path or discharge from the water purification flow path and downstream of the activated carbon and that cuts off a water hammer propagating from the flow path switching valves to the activated carbon.

Abstract: An apparatus and method for a grease trap for separating grease and solid waste from waste water. The grease trap includes a tank having a downwardly shaped bottom. An upwardly shaped baffle insert divides the tank into an upper chamber and a lower chamber. An outlet port near an upper part of the baffle allows waste into the upper chamber. An inlet invert in the tank receives incoming waste water, while an outlet invert removes water from the tank. A removable cover covers the tank and allows access for removal of accumulated grease and solid wastes.

Abstract: A round meander septic tank includes an elongate baffle that divides the interior space of the tank into two semicircular chambers. Untreated wastewater is introduced to the first chamber through an inlet located near the first end of the baffle. The wastewater flows through the first chamber to a portal at the second end of the baffle and passes through the portal into the second chamber. A wastewater outlet from the tank is located in the second chamber near the first end of the baffle. Wastewater passing through the portal flows through the second chamber to the outlet and out of the tank. The baffle and the shape of the septic tank increase the distance that the wastewater must flow from the inlet to the outlet as compared to a rectangular meander tank with a single baffle.

Abstract: A septic system, including a septic tank and a pipe positioned within the septic tank, is provided. The pipe receives sewage and provides a flooded, anaerobic environment for sewage passing therethrough. The outlet of the pipe is positioned inside the septic tank and is optionally spaced from the outlet of the septic tank. In operation, the sewage introduced into the pipe generally separates into a solid portion comprising sludge, which remains in the pipe, and a liquid portion, which passes through and around the sludge. In one embodiment, the septic system has an absence of a sump chamber upstream of the septic tank.

Abstract: Storage tanks, for example, underground septic tanks, and their methods of fabrication are provided. The tanks include a substantially liquid impermeable plastic vessel having a top, a bottom, and sides; a concrete container encasing and retaining the plastic vessel, the concrete container contacting the bottom and at least partially contacting the sides of the plastic vessel; and at least one opening for receiving effluent, for example, waste effluent, into the plastic vessel. The methods of fabricating the tanks include positioning a plastic vessel into an enclosure; introducing concrete into the enclosure about the plastic vessel; allowing the fluid concrete to cure to provide a substantially solid concrete container about the plastic vessel; and removing the plastic vessel having a concrete container from the enclosure. Vessel shape retaining devices are also disclosed. Aspects of the invention are uniquely adapted to underground storage.

Abstract: An apparatus and method for a grease trap for separating grease and solid waste from waste water. The grease trap includes a tank having a downwardly shaped bottom. An upwardly shaped baffle insert divides the tank into an upper chamber and a lower chamber. An outlet port near an upper part of the baffle allows waste into the upper chamber. An inlet invert in the tank receives incoming waste water, while an outlet invert removes water from the tank. A removable cover covers the tank and allows access for removal of accumulated grease and solid wastes.

Abstract: A water closet for disposing of human waste includes a septic system, a toilet, a floor, and an enclosure. The septic system includes a primary chamber, a secondary chamber spaced a distance laterally from the primary chamber, a fluid communication member extending between the primary chamber and the secondary chamber, and an outlet member extending away from the secondary chamber. The septic system further includes an anaerobic bacterial treatment that processes excretory material disposed in the primary chamber into effluent which is transferred out of the primary chamber via the fluid communication member and into the secondary chamber before it is transferred out of the secondary chamber via an outlet member that extends towards either a leach field or a third chamber.

Abstract: A device and system for monitoring the sludge level in a septic system tank, wherein a plurality of monitoring devices are positioned within a septic tank being monitored. Each monitoring device preferably includes a base unit, and a probe arm extending down from the base unit into the septic tank, wherein each probe arm includes a light emitting diode arm and a dark sensor photocell arm.

Abstract: Treatment of wastewater containing contaminants is provided. More specifically, treating wastewater through capture and recirculation of percolated fluid effluent through and from one or more infiltration field systems is provided.

Abstract: A pump for pumping water from a bowl of a washing machine is provided. The pump includes a housing coupled to the bowl and a cover with an aperture. The housing and the cover define an interior in fluid communication with the bowl interior via the aperture. A filter filters water entering the interior via the aperture. The filter has a profiled wall defining a volute around the aperture, and a hood disposed above the wall. The profile of the hood perimeter substantially corresponding to the profiled wall to define a profiled space between the perimeter and the profiled wall. The profiled space allows water to enter the volute but substantially prevents elongated objects entering the volute.

Abstract: The point of the invention is to evenly distribute water or effluent over an irrigation area or a drain field. Typically the fluid comes from a reservoir or a septic tank and is fed, by gravity, into a number of discharge pipes that would be located underground. The device related to this invention is characterized by a container with an inlet at the top and a number of outlets at the bottom. Inside the container the fluid is directed to the center of a flow splitter surface underneath, via a specifically configured spout. To make the fluid spread radian and uniformly towards the surface's perimeter this surface has hydrophilic properties and is convex shaped. The fluid eventually flows uniformly over the surface's edge and is evenly distributed over the outlets at the bottom.

Abstract: A grit removal system for tanks with a need to remove settled solids (e.g., anaerobic digester tank) is described. The system is especially suitable for a large tank, preferably having a flat floor, and it works well while submerged under a liquid. Specifically, a periphery-driven rack & pinion mechanism drives a shaft to rotate about a center pivot, and scrapes settled solids towards tank periphery, where the solids fall into a pit on the tank floor. A drainage opening inside the pit, when opened by a valve, is used to flush out the solids through a standpipe into a settlement tank for final dewatering and solid disposal. The system is compatible for continuous tank operation, and is useful for stirring tanks requiring periodic sediment removal.

Abstract: The present invention is a wastewater treatment system utilizing a recirculating filter system comprising sand, gravel, or synthetic media. Septic effluent is continuously, or approximately continuously, dosed under pressure to the treatment media through pressure compensating drip irrigation emitters. The system comprises a commonly known septic tank and recirculation tank. Septic tank effluent is collected in the recirculation tank, from which it is continually dosed by means of a pump to the top of the treatment media of the recirculating filter through pressure compensating drip emitters. Continuous dosing of diluted residential septic tank effluent through drip irrigation emitters provides a slow consistent application of liquid rich in organic material and pathogens over the treatment media. The treated effluent is then recirculated if water is low or went to final disposal.

Abstract: The wastewater treatment system includes a hollow, elongate, horizontally disposed, cylindrical body made from plastic is adapted for water storage and treatment. The cylindrical body includes reinforcement ribs formed by a helically wound steel band embedded in the plastic and extending between opposite open ends of the elongate cylindrical body. A voltage source selectively energizes the steel band. A pair of bulkhead members respectively extends across and covers opposite ends of the cylindrical body. A fluid-tight wall is mounted in the cylindrical body, the first bulkhead member, the fluid-tight wall and the cylindrical body forming a fluid-tight tank defining a liquid storage chamber. The second bulkhead member and the fluid-tight wall define a dry liquid treatment equipment chamber. An inlet pipe extends into the tank for admitting the pretreatment liquid into the tank. An outlet pipe extends from the tank and discharges the treated liquid from the tank.

Abstract: Devices, processes, systems, and articles of manufacture adapted to treat contaminated fluid, such as organic wastewater, are described. These are described to include lifting contaminated fluids, treating contaminated fluids, or both, through gas application. In certain designs, gas, such as pressurized air, may be used to lift contaminated fluids, such as organic wastewater (i.e., water having contaminating organics of some kind, e.g. residential septic wastewater). In certain designs, gas, such as pressurized air, may also be used to treat fluids interfacing with the gas.

Abstract: A method to purify water includes the steps of providing a septic tank to hold unpurified water and having an outlet to provide a water stream for processing, and processing the water in an electrocoagulation and flocculation reactor that uses electrical energy to convert dissolved solid material in the water stream into suspended particulate form that can be subsequently filtered and separated out. The method continues with introducing air into the water stream to promote aerobic processing of contaminants and to assist in agglomeration and flocculation of suspended solid material, filtering the water stream to separate suspended solid material from the stream and to adsorb some of its dissolved contaminants, and processing the water stream with a reverse osmosis processor that provides a reject stream that provides water back to the septic tank and a recycle stream that provides unpurified water back to the water stream exiting the septic tank.

Abstract: A plastic septic tank has a body made by rotational molding or blow molding and at least one access opening in the top. A ring flange is structurally attached to the top of the body so the bore of the flange fits the access opening. A plastic ring flange has a flexural modulus which is greater than 100,000 psi and at least twice the flexural modulus of the plastic material of the tank body. An exemplary flange is made of a plastic material which includes 5-30 weight percent glass fibers, a significant portion of which are aligned with the plane of the flange upper surface.

Abstract: In a sewage disposal system, a de-nitrification station is configured as a heap of foam cubes located in an airtight enclosure from which oxygen is excluded. Carbon is added to the incoming nitrified water. The heap of foam cubes is arranged as a free-draining trickle filter, but here under asphyxiant conditions in the enclosure. Anaerobic microbiological reactions reduce the nitrate to nitrogen gas. Effluent from the de-nitrifier is polished by feeding back a fraction of the effluent through the aeration station from which the nitrate water is derived, or a separate polishing station can be provided.

Abstract: A Water and Wastewater Treatment Aerated Mini-Dosing air-lift pump System and filter housing, that replaces the conventional dosing pump, controls and additional Tank. It is adaptable to all access ports and uniquely smaller than a 3? inspection port and is integrally positioned in an existing or new raw water pretreatment or pump tank. It aerates the source pool thereby mitigating: H2SO4 gases, odors and source pool BOD5. The system communicates with an above ground aerator and optional controls and in it's plurality supplies dissolved and free oxygen to the pump, housing, effluent and the source pool, with surge protection and scum mitigation. Mini-metering and, low pressure, extended cycle durations increase the average microbial production balance and microbial Ratio to nutrients BOD. The raw sewage tank no longer requires gas removal prior to inspection due to oxic and anoxic microbial processes that mitigates H2SO4 gases.

Abstract: In a kind of modular integrated water purifying device, including reaction tank, sedimentation tank and filter pool, a pump is connected to the top side of the reaction tank through pipes and valves. There are variable grid hole mixing paddles in the reaction tank, forced outlet pipe at the bottom of sedimentation tank and the same-flow ramp board in the middle. The sedimentation water collector is set up below the board, with the purified water outlet tube connected. The traveling sludge sucker sits on the top of filter tank and move back and forth. Blanket-shape filters is vertically fixed in the filteration tank, the mud-suction pump below to the raveling mud-suction machine connects to the mud-suction pipe another side to the blanket-like wedge filters. At the bottom of the filteration tanker lie the water-collecting main pipe and clean water outlet, the effluent weir is fixed inside of the filteration tank.

Abstract: The present invention is directed to a method for filtering fluid, preferably effluent fluid in a septic system, by providing a staged, filtering array in an effluent flow path, the stages positioned in an orientation designed to maximize filtering capability in conjunction with predetermined apertures.

Abstract: The present invention is directed to a method for filtering fluid, preferably effluent fluid in a septic system, by providing a staged, filtering array in an effluent flow path, the stages positioned in an orientation designed to maximize filtering capability in conjunction with predetermined apertures.

Abstract: The wastewater treatment system includes a tank having first and second partition walls dividing the tank into first, second and third chambers. An inlet port is formed through the first chamber and an outlet port is formed through the third chamber. A first port is formed through the first partition wall for controlling fluid flow from the first chamber to the second chamber, and a second port is formed through the second partition wall for controlling fluid flow from the second chamber to the third chamber. Oils and sludge are removed from the wastewater in the first chamber. Anaerobic bacteria within the second chamber then removes organic material from the water. The water is stored in the third chamber is irradiated by germicidal ultraviolet light before discharge from the third chamber.

Abstract: Biological treatment with the small-bubble aeration (air artificial supply) for oxidizing waste water components in a unit for integrated waste water biological treatment includes a reservoir with a waste water receiving chamber, an aerotank chamber, a secondary settling tank and an activated sludge stabilizer. The receiving chamber is communicated through an air-lift to the aerotank chamber and includes a primary filter and a device for blowing off the filter, float-type level guages and an air-lift for transferring waste water, an air-lift for transferring a grease film into the aerotank chamber. The receiving chamber, the aerotank chamber and the activated sludge sterilizer are provided with aerators. The aerotank chamber and the secondary settling tank is supplied from at least two compressors, the chamber of the activated sludge stabilizer is provided with an intermediate partition forming an additional chamber for stabilizing sludge.

Abstract: A gas baffle for a waste water treatment plant filter housing that includes a first and second deflecting plate. The gas baffle has at least one flow-through opening defined by the first and second deflecting plates. The combination of the first and second deflecting plates deflects rising gas bubbles and any solid particulates so that the bubbles and particulates do not enter the filter housing. The gas baffle may include exterior apertures to dissipate the rising gas bubbles that travel on the bottom surface of each deflecting plate. The gas baffle may be integrally formed with the filter housing or created separately and subsequently connected.

Abstract: A septic tank or storage tank has a corrugated thermoplastic wall which has a composite layered structure. A tank wall comprises an inner layer of solid plastic for containing liquid; an outer layer made of solid plastic, for resisting external mechanical forces, and a middle layer of closed cell foam plastic for both resisting liquid flow which penetrates the inner or outer layer and for heat retention which encourages biological processes. In an embodiment, the middle layer has less than about 55 percent of the density of the inner and outer layers, and the inner layer is substantially thinner than the outer layer. The three layers are integrally attached at the time of formation of the tank by rotational molding. The tank has good resistance to mechanical forces and provides insulation.

Abstract: A molded modular wastewater treatment system including a tank with molded double thick baffle walls made of UV stabilized ?? thick polyethylene. The system is designed with three separately molded and interconnected chambers, a pretreatment chamber connected to a first side of an aeration chamber and a second side of the aeration chamber connected to a clarification chamber. The pretreatment chamber initially receives the wastewater and uses anaerobic bacterial action and gravity to precondition the wastewater and then passes the preconditioned water to an aeration chamber. The aeration chamber receives the pretreated wastewater from the pretreatment chamber and uses aerobic bacteria to biologically convert the waste in the wastewater into stable substances and then pass it to the clarification chamber. The clarification chamber receives the flow from the aeration chamber and settles out any biologically active material in the flow and returns it to the aeration chamber for additional processing.

Abstract: A wastewater filtering system is provided for the passage of the wastewater from the home to the septic tanks prior to passage to the drain fields. The system comprises a separate septic tank assembly and a grease trap assembly operatively adapted to receive the wastewater from the home prior to the passage of the wastewater into the drain fields. Septic tank assembly and grease trap assembly are specifically configured to separate the filtering of waste water from the kitchen from the sewage from the bathrooms to prevent the clogging of the entire filtering system.

Abstract: A wastewater treatment system for processing borne wastewater. The treatment system having a tank with an inlet and an outlet and an access assembly residing at the top of the treatment tank. The treatment tank having an aeration chamber where oxygen is added to the wastewater to encourage bacterial breakdown of the solid waste. The treatment tank also having a clarifying chamber separated by a frusto-conical wall. The treatment tank also containing an ultraviolet disinfection system which exposes the wastewater to ultraviolet light prior to the wastewater exiting the treatment tank such that bacteria in the wastewater is neutralized prior to discharge.

Abstract: A septic tank float mounting system includes a septic tank having a pump therein. A discharge conduit is in fluid communication with the pump. A pump actuating assembly is removably positioned in the septic tank. The pump actuating assembly includes a tube having a first end and a second end. A plurality of clamps is attached to the tube and releasably engages the discharge conduit. A control is positioned outside of the septic tank. An electrical conduit extends through the tube and is in electrical communication with the control and the pump. A float apparatus is releasably engaged to the tube and in communication with the electrical conduit. The float apparatus signals the control to turn on the pump when the float apparatus detects a preselected height of fluid in the septic tank.

Abstract: A self-cleaning discharge system used with a wastewater treatment system. The wastewater treatment system includes a tank for collecting wastewater while the wastewater typically includes solid particles. The discharge system comprises a housing, a filter positioned in the housing, an effluent discharge apparatus positioned inside the filter, and a venturi effect flushing system positioned proximate to the bottom of the housing. The housing includes a perimeter and at least one intake aperture positioned in the perimeter to accept the wastewater. The filter is shaped to substantially restrict flow of particles into the filter and to the discharge apparatus. The discharge apparatus is in fluid communication with the wastewater in the tank and includes a discharge path to position to transport filtered wastewater outside of the tank. The venturi effect system is in fluid communication with the housing and the tank to return the particles restricted by the filter to the tank.

Abstract: Treating wastewater by receiving wastewater having a reduced concentration of waste solids into a secondary containment space and allowing the waste solids to distribute into a lower horizontal sludge layer, an upper horizontal scum layer, and a relatively clear horizontal layer of liquid therebetween; flowing the liquid from the relatively clear layer through at least one filter element enclosed in a housing the top of which is submerged below the wastewater level of the secondary containment space; and thereafter flowing the filtered effluent out of the housing. In some embodiments, the filtered effluent may be discharged from the secondary containment space using an effluent pump configured with a conventional flow inducer or, alternatively, using an effluent pump sealably configured with a shortened flow inducer thereby allowing discharge of the filtered effluent to a wastewater level below that of the pump's intake.

Abstract: Methods, systems and compositions for a green sorption media for bioretention soil amendments in drainfields for on-site waste water systems filled with the green sorption media to foster an anaerobic or anoxic environment saturated. The green sorption media includes one or more recycled materials, including tire crumb, sawdust, orange peel, coconut husks, leaf compost, oyster shell, soy bean hulls and one or more naturally occurring materials including peat, sands, zeolites, and clay. The wastewater filtration system for a passive drainfield includes the green sorption material mixture, a cell including baffled compartments and a riser, the cell filled with green sorption material mixture to provide an alternating cycle of aerobic and anoxic environments, an influent distribution system to distribute the influent over the cell, and a piping system arranged for dosing the cell to sustain the functionality of the green sorption material mixture to remove nutrient content in wastewater.

Abstract: The system comprises one or more of the following: primary treatment units, flexible pipes, and optionally, one or more pumps. The system is designed and installed in a manner that enables the flow of liquid to be predominantly due to gravity, although one or more pumps may optionally be included at key positions. The system can be sealed and pressure tested in order for optimal performance to be achieved during operation.

Abstract: A self-cleaning discharge system used with a wastewater treatment system. The wastewater treatment system includes a tank for collecting wastewater while the wastewater typically includes solid particles. The discharge system comprises a housing, a filter positioned in the housing, an effluent discharge apparatus positioned inside the filter, and a venturi effect flushing system positioned proximate to the bottom of the housing. The housing includes a perimeter and at least one intake aperture positioned in the perimeter to accept the wastewater. The filter is shaped to substantially restrict flow of particles into the filter and to the discharge apparatus. The discharge apparatus is in fluid communication with the wastewater in the tank and includes a discharge path to position to transport filtered wastewater outside of the tank. The venturi effect system is in fluid communication with the housing and the tank to return the particles restricted by the filter to the tank.

Abstract: Disclosed is a wastewater treatment apparatus utilizing time tested techniques for recirculating media treatment with proprietary advancements to produce a system capable of nitrifying and denitrifying wastewater through the use of passive calcium carbonate and organic carbon feed systems. By creating aerobic and anaerobic zones and the ability to monitor and adjust these zones by physical and mechanical means with minimal operator involvement, wastewater is recycled through these zones thereby creating an enhanced biological filtering process. The treated wastewater is then discharged to standard leaching facilities, various irrigation uses and/or introduced to further treatment for water recycling and reuse.

Abstract: This invention is directed to a wastewater treatment system having a fluidizable media carrying anoxic bacteria in a first treatment zone and a filter membrane positioned in a second treatment zone. A wastewater is contacted with the fluidizable media and further contacted with air and a filter membrane.

Abstract: The present invention is directed to a method for filtering fluid, preferably effluent fluid in a septic system, by providing a staged, filtering array in an effluent flow path, the stages positioned in an orientation designed to maximize filtering capability in conjunction with predetermined aperture positions and dimensions.

Abstract: A settling and retention basin includes an interior chamber having a peripheral wall preferably provided with two diametrically opposite openings in each of which is received a flow port member having a flow equalization port therein. Depending upon wastewater levels and surges, the flow port members can be removed and replaced by other flow port members of an identical construction, except for different sizes of design flow equalization ports thereof.

Abstract: A chlorinator for wastewater treatment systems having a circulation pump, circulation tank, and return flow line, which includes a reservoir of disinfectant fluid and a dosage container communicating with the reservoir and the circulation tank to dispense a determined quantity of disinfectant during operation of the circulation pump. The dosage container is vented to atmosphere to prevent vacuum lock in operation and communicates with the reservoir at a flow rate substantially smaller than it communicates with the circulation tank. Operation of the circulation pump causes flow through the return line, inducing distribution of the quantity of disinfectant fluid into the circulation tank. As the dosage container outgoing flow rate far exceeds the dosage container incoming flow rate, once the disinfectant level drops below the point of communication between the dosage container and the circulation tank, no her disinfectant is drawn into the circulation tank.

Abstract: A simple and improved septic tank wastewater treatment system is needed to improve effluent quality and reduce conventional onsite system failures such as hydraulic overloading and formation of a clogging biomat in the soil treatment area. One illustrative embodiment of the septic tank system (10, 100, 122) disclosed includes a septic tank system having a primary treatment compartment (28, 116) for settling solids and floating fats, oils and grease, and a second treatment compartment (34, 141) adapted to provide an upflow anaerobic sludge blanket (UASB) process for providing additional treatment of the wastewater prior to discharge to soil treatment areas. Another illustrative embodiment of the septic tank system includes separate primary (100) and UASB tanks (122) coupled in series.

Abstract: A flow control device for the drain lines of a septic system interrupts the flow in the event the proximate water table rises to a level of over-saturation resulting in the effluent flow being directed to the remaining drain lines. Each drain line is provided with a control box having a float controlled inlet valve having an open position allowing flow to the drain line. When the drain line cannot handle the required flow rate or when the proximate water table rises, the float shifts the valve toward a closed position, thereby redirecting the flow to the remaining lines.

Abstract: The application device for liquid containing micro-nano bubbles generates micro-nano bubbles in a wide size distribution with use of a submerged pump-type micro-nano bubble generator and a spiral flow-type micro-nano bubble generator. A micro-nano bubble generating aid metering pump is controlled by a bubble level meter and a level controller, so that the supply amount of a micro-nano bubble generating aid is controlled in response to the level of bubbles from a fluid level. The supply amount of a micro-nano bubble generating aid is also controlled by a turbidimeter and a controller in response to the turbidity of the liquid in a micro-nano bubble generation tank, while the amount of air supplied to the submerged pump-type micro-nano bubble generator is controlled in response to the turbidity of the liquid. Therefore, the device can produce a large amount of various micro-nano bubbles in a wide size distribution more economically.

Abstract: In one aspect of the invention, a sewer system has a waste material flow path which has an entrance and a downstream digester assembly. At least one in-line agitator is disposed upstream to the digester assembly. The at least one in-line agitator adapted to break down the waste material.

Abstract: A modular wastewater clarification device that may be positioned external to a septic tank or, alternatively, installed internally within a septic tank chamber to produce sufficiently clean water for lawn and agricultural uses. The modular clarification device includes a filter having a smaller size than the pre-filter bridging between the primary and secondary chambers of a septic tank. In one embodiment, the modular filtration unit resides outside the two-chambered septic tank and receives pre-filtered septic tank effluent fluids stored in the secondary chamber that has accumulated pre-filtered effluent. In another embodiment, the modular wastewater clarification device resides inside the secondary chamber and filters the accumulated pre-filtered effluent.

Abstract: In a tank B for water treatment, consisting of at least two plastic material tank parts 1, 2 produced by injection moulding or by injection moulding and embossing a separately produced separation wall T is mounted with the edge at the walls of the tank parts such that the mounting regions at least partly are watertight. The separation wall T extends in the tank B crosswise to the joining plane E. The tank parts have opening edge structures R which fit on each other and which are joined in the joining plane E in watertight fashion.

Abstract: Heating systems and methods of preventing freeze-ups of underground tank systems. In septic underground tank systems, bacteria activity is enhanced by raising the temperature within the bacteria's environment. The preferred heater system includes a thermostatic control unit with a temperature sensor which may be selectively located to sense the temperature within a portion of the underground tank system. The heating systems and methods are particularly useful in mound or drainfield septic systems as well as underground water tanks.