Abstract: An apparatus and method for denitrification of treated wastewater from an aerobic wastewater treatment system in which oxygen levels in the aeration chamber of an aerobic digestion vessel are cycled between an anoxic environment, i.e., when the treated wastewater in the aeration vessel contains from just above 0 to just less than 1 ppm dissolved oxygen to an aerobic environment wherein the treated wastewater in the aeration vessel has a dissolved oxygen content of about 1 ppm or higher.

Abstract: A system for introducing a liquid disinfectant into treated wastewater comprising a source of liquid disinfectant, a sensor to detect flow or level of treated wastewater from a wastewater treatment system, a selectively operable valve to allow the liquid disinfectant to flow via gravity into the treated wastewater and a controller operatively connected to the sensor to open the valve in response to sensed, increased flow or level of the treated wastewater in a receiver for said wastewater above a sensed, predetermined point.

Abstract: A system for introducing a liquid disinfectant into treated wastewater comprising a source of liquid disinfectant, a sensor to detect one of flow or level of treated wastewater in a receiver from or in a wastewater treatment system, a selectively operable pump to transfer the liquid disinfectant from the source into the treated wastewater and a controller operatively connected to the pump to selectively activate the pump in response to sensed, increased flow or level of the treated wastewater in the receiver for said wastewater above a sensed, predetermined point.

Abstract: A sparse data system is provided for verifying operational compliance of a plurality of wastewater treatment systems. To reduce operational costs to a minimum, the quantity of data transmitted is minimized and the data is only transmitted at certain times. If systems are compliant, then information is preferably not sent. If systems are non-compliant, then notices are sent to parties of interest at effectively the same time as the noncompliance occurs. Subsequent alarm detection level may also be set to provide notice for severe noncompliance.

Abstract: A sparse data system is provided for verifying operational compliance of a plurality of environmental systems. To reduce operational costs to a minimum, the quantity of data transmitted is minimized and the data is only transmitted at certain times. If systems are compliant, then information is preferably not sent. If systems are non-compliant, then notices are sent to parties of interest at effectively the same time as the noncompliance occurs. Subsequent alarm detection level may also be sent after detection of an operational threshold to provide notice for continued ongoing or severe noncompliance.

Abstract: An apparatus and method for denitrifying wastewater wherein treated wastewater having a high DO and being highly nitrified is exchanged with wastewater which is anoxic to provide an environment for the denitrification of the highly nitrified wastewater, the method and apparatus including a system for controlling DO in the anoxic wastewater.

Abstract: A vessel assembly for use in a wastewater treatment system having a first vessel, a second vessel, a first gusset assembly attached to and connecting the first and second vessels and a second gusset assembly attached to and connecting the vessels, at least one of the gusset assemblies provides an upwardly facing surface or pocket for holding fill materials such as dirt or gravel to counter buoyancy acting on the vessel assembly.

Abstract: An aerator assembly for use in the aeration vessel of a wastewater treatment system comprising a rigid tubular member having an upper end and a lower end, and a diffuser assembly, the diffuser assembly comprising a flexible connector and a diffuser head, the flexible connector connecting the diffuser head to the lower end of the rigid tubular member and providing a fluid flow path between the tubular member and the diffuser head, the upper end of the rigid tubular member being adapted to be connected to a source of an oxygen-containing gas such as air.

Abstract: An apparatus for treating wastewater with a liquid disinfectant comprising a vessel for wastewater, a pump in the vessel, a discharge conduit connected to the outlet of the pump for discharging water from the vessel, a first valve in the discharge conduit to control flow through the discharge conduit, a recirculation conduit connected to the pump discharge for recycling at least a portion of the wastewater discharged from the pump back into the vessel, a container for liquid disinfectant, a feedline connected to the container to feed disinfectant into the vessel, a second valve in the feedline to control the flow of disinfectant through the feedline and a control system connected to the pump and the first and second valves to selectively cause opening and closing of the first and second valves at desired intervals for predetermined periods of time and selectively activate the pump at desired times for predetermined periods of time.

Abstract: The present invention provides a service personnel detection system for detecting and reporting the presence of service personnel at a plurality of environmental equipment systems. The service personnel detecting systems utilize various wireless means for sensing or recording a presence of service personnel adjacent the plurality of environmental equipment systems. The service personnel detection information may be sent to one or more storage units via numerous different communication channels depending on the system architecture.

Abstract: A system is provided for verifying operation of a plurality of alarm systems in a plurality of environmental equipment systems that comprises a plurality of first communication nodes and a plurality of second communication nodes. Each second communication node is typically mounted within a yard to about six hundred yards from respective first communication nodes. The first communication nodes send a first verification signal, e.g., a heartbeat signal to verify the alarm systems to the second communication nodes at first predetermined intervals. The plurality of second communication nodes detect when the first verification signal is not received at the first predetermined intervals. The second communication nodes then determine whether to send a malfunction notification to a server base on predetermined criteria. The second communication nodes may send a second heartbeat signal to the server at other predetermined intervals.

Abstract: An aerobic wastewater treatment plant having a peripheral wall, at least three compartments being formed within the peripheral wall in conjunction with bottom wall, the peripheral wall having first and second end walls which are radiused and having at least portions thereof which have the same radius and the first and second side wall, the side wall and end walls being shaped and adjoined to each other so as to form a smooth contour on the outer surface of the peripheral wall, the peripheral wall preferably having an oval-like configuration when viewed in top plan view.

Abstract: A system for introducing a liquid disinfectant into treated wastewater comprising a source of liquid disinfectant, a sensor to detect flow of treated wastewater from a wastewater treatment system, a pump to introduce the liquid disinfectant into the treated wastewater and a controller operatively connected to the sensor to activate the pump in response to increased flow of treated wastewater above a sensed, predetermined flow rate.

Abstract: A system for the chemical treatment of wastewater may be discharged in a night spray system, an on demand system or a dosing system. Tank 12 receives wastewater, and a discharge pump 16 pumps wastewater from the tank in the night spray system. A sensor 24 deactivates the discharge pump when the wastewater level reaches a predetermined low level, and in some applications activates the discharge pump when the wastewater level reaches a predetermined high level. A liquid disinfectant pump 38 pumps liquid disinfectant to the tank, and a controller 30 activates a liquid disinfectant pump for a selected time interval as a function of the discharge system.

Abstract: The present invention provides an electronic system and method that permits a responsible parties to determine whether services such as maintenance and repairs have been timely made on environmental equipment installations, such as homeowner wastewater treatment plants, to comply with regulatory requirements. The environmental equipment installations may be installed at different locations, operating on different inspection schedules, with different service companies, different owners, of different types, and be of different processing capacity. A personnel detector is preferably utilized to verify the actual physical presence of service personnel. In a preferred embodiment, the system provides a scheduler for service companies whereby information regarding service schedules and required repairs is available online. The scheduler is operable for generating service routes based on present requirements and/or for providing maps to locations for service personnel.

Abstract: A defined current and aeration system for the aeration chamber of an aerobic wastewater treatment plant is disclosed. It includes the release of oxygenation gas or air into the aeration chamber through a diffuser or the like at a position such that the air injected into the tank provides the necessary amount of oxygen for aerobic bacterial digestion of the waste while creating a current or circulation pattern in the chamber that forces every portion of the fluid within the aeration chamber into circulation thus preventing the accumulation of solids as sludge in the wastewater treatment plant.

Abstract: Apparatus for and a method of reducing solids and controlling surges in the flow of effluent from the clarifier chamber of an aerobic wastewater treatment plant. The apparatus is mounted inside the clarifier chamber of the wastewater treatment plant and connected to an outlet pipe of the plant. The apparatus includes a cylindrical tubular weir positioned in a cylindrical housing connected to the outlet pipe of the clarifier. The surge control weir assembly restricts the flow of the effluent from the clarifier resulting in an accumulation of effluent in the surge control weir assembly from which it flows at a rate proportioned to the volume retained in the assembly and resulting in a settling of minute suspended solids in the clarifier chamber. The surge control weir provides a final screening of the effluent through aerobic bacteria which grow in the slots of the assembly to digest the last solid particles from the water as the water slowly passes through the assembly.

Abstract: A defined current and aeration system for the aeration chamber of an aerobic wastewater treatment plant is disclosed. It includes the release of oxygenation gas or air into the aeration chamber through a diffuser or the like at a position such that the air injected into the tank provides the necessary amount of oxygen for aerobic bacterial digestion of the waste while creating a current or circulation pattern in the chamber that forces every portion of the fluid within the aeration chamber into circulation thus preventing the accumulation of solids as sludge in the wastewater treatment plant.