A bioreactor for a water treatment system includes an aerator tank configured to receive an influent liquid, and a clarifier positioned in the aerator tank, the clarifier having a generally conical shape and defining a downwardly-facing opening. An interior of the clarifier is in communication with the aerator tank, external to the clarifier, at least via the downwardly-facing opening, and wherein the clarifier is positioned non-concentrically with the aerator tank. The bioreactor further includes a plurality of aeration vents positioned proximal to a bottom of the tank and configured to direct air into the aerator tank, and an effluent outlet positioned in the clarifier. A relatively clean effluent liquid, in comparison to the influent liquid in the aerator tank, exits from the clarifier via the effluent outlet.

A water treatment apparatus includes a flat plate and a remover. The flat plate rotates so as to be partially immersed in raw water and to which microorganisms that purify the raw water are attached. The remover removes part of the microorganisms adhering to the flat plate.

A method for advanced nitrogen and phosphorus removal of domestic sewage based on DEAMOX in AOAO process with sludge double-reflux is disclosed. The method comprises allowing domestic sewage and returned sludge of the secondary sedimentation tank (3) to enter the anaerobic zone (2.1) of the AOAO reactor (2), firstly performing partial denitrification by the denitrifying bacteria, reducing nitrate-nitrogen in the returned sludge to nitrite-nitrogen, then converting ammonia-nitrogen and nitrite-nitrogen into nitrogen by anammox bacteria, and phosphate accumulating bacteria and denitrifying phosphate accumulating organisms performing anaerobic phosphate release and storing internal carbon source; then allowing part of the mixed liquid to enter the intermediate aerobic zone (2.2) of the AOAO bioreactor (2) to carry out phosphate uptake and nitrification reaction, allowing another part of the mixed liquid to enter the anoxic zone (2.3) of the AOAO bioreactor (2), at same time allowing all the mixed liquid of the intermediate aerobic zone (2.2) and part of returned sludge of the secondary sedimentation tank (3) to enter the anoxic zone (2.3), using the internal carbon source stored in the anaerobic compartment and the internal carbon source in the returned sludge to carry out partial denitrification, anammox, denitrifying dephosphatation, and then allowing the mixed liquid to enter the post aerobic zone (2.4) and subsequently enter the secondary sedimentation tank (3) for mud-water separation. An apparatus for advanced nitrogen and phosphorus removal of domestic sewage based on DEAMOX in AOAO process with sludge double-reflux is also disclosed.

A bioreactor for a water treatment system includes a tank configured to receive an influent liquid, a separator structure positioned in the tank, the separator structure having a frustoconical shape and defining a downwardly-facing opening proximal to or at a bottom of the separator structure, an interior of the separator structure being in communication with the tank, external to the separator structure, at least via the opening, an aeration vent positioned proximal to a bottom of the tank and configured to direct air into the tank, but not directly into the interior of the separator structure, and an effluent outlet communicating with the interior of in the separator structure, proximal to a top of the separator structure, a relatively clean effluent liquid, in comparison to the influent liquid in the tank, exiting from the separator structure via the effluent outlet.

An integrated equipment and treatment method for synchronous ecological treatment of domestic sewage and sludge, the equipment includes a one-piece box-shaped main body divided into several tank compartments which includes an anaerobic tank, a sludge reduction and denitrification tank, an aerobic tank, a sedimentation tank, and a disinfection tank, an inlet pipe for sewage and sludge entrance and an outlet pipe for exit of effluent after treatment. The sludge reduction and denitrification tank is equipped with variable microporous aeration pipes, worm fillers and multi-functional water quality online detectors. The aerobic tank is equipped with aeration pipeline components and DO online detectors. The sewage and sludge are guided to passing through the different tank compartments in order for simultaneous sewage treatment and sludge reduction. The removal rate of total nitrogen is as high as 85%, and the simultaneous reduction effect of sludge can reach more than 60%.

The invention relates to a waste water treatment plant including at least a multi-step water treatment reactor arranged for receiving influent waste water, for carrying out at least a biological step and a sedimentation step and for providing effluent pure water, by means of an effluent weir. The wastewater treatment plant further includes means for increasing the sedimentation velocity, and means for hindering floating elements to get into the effluent weir.

A wastewater treatment system for households, individual buildings, hotels, neighborhoods, and wastewater treatment plants is designed to treat wastewater effluent from an initial treatment system such as a septic tank or a primary or secondary treatment system. A self-regenerating bioreactor garden is connected in series with the initial treatment system. The self-regenerating bioreactor garden receives untreated or minimally treated wastewater effluent from the initial treatment system and is designed to dramatically reduce the volume and concentrations of nitrogen, phosphorus, biological oxygen demand, and suspended sediments in the wastewater effluent so that the treated wastewater effluent can be discharged directly into leach field, seepage pit, injection well, or another surrounding environment. The self-regenerating bioreactor garden can meet or exceed the applicable requirements of National Sanitation Foundation, including NSF 245 and NSF 40, and equivalent standards.

The invention relates to an anaerobic waste water purification tower (21) comprising a sludge reactor (22) with a waste water inlet zone (23), an active zone (24), a first set (25) of three phase separating means for separating sludge, gas and water, comprising at least one layer of adjacent gas hoods (26) connected to a gas collector tank (27) positioned above the reactor (22),and a clean water effluent outlet (31), wherein the gas hoods (26) are hooded lamellas for improving the separation of gas, sludge and water.

Disclosed are partial nitritation using a sequencing batch reaction tank with media inputted thereinto, and an apparatus and system for shortcut nitrogen removal using the same. According to one aspect of the present embodiment, a sequencing batch reaction tank operating apparatus and method capable of smoothly performing partial nitritation by adjusting the concentrations of free ammonia and free nitrous acid are provided.

A total nitrogen (TN) removal device for sewage and its operation method. The TN removal device includes a denitrification tank, a supplementary reaction zone filled with aerobic granular sludge and a sedimentation and separation zone. The supplementary reaction zone and the sedimentation and separation zone are arranged inside the denitrification tank, and communicated through a three-phase separator. The sedimentation and separation zone is located above the supplementary reaction zone. A top of the sedimentation and separation zone is greater than its bottom. A membrane aerated biofilm reactor (MABR) assembly is arranged in a space formed by outer walls of the sedimentation and separation zone and supplementary reaction zone and an inner chamber of the denitrification tank. A side wall of the denitrification tank is provided with a chemical oxygen demand (COD) detector and a nitrate nitrogen detector.