Disclosed is a facility for treating waste water of municipal or industrial origin, in particular a facility for primary treatment of the water, including a biological contact tank equipped with biological rotating discs, which is connected upstream of a ballasted-floc physiochemical decanter, the decanter being at least made up of a coagulation zone, a flocculation zone, a lamellar decanting zone and a thickening zone and an external circuit allowing the recirculation of the sludge thickened in the thickening zone to the flocculation zone and the biological contact tank.

A development improves values such as energy consumption, noise, etc., besides, increasing the efficiency of a purification module used during a purification of waste water. A patterned disc enables biological activity to be carried out in a larger area by way of a high surface area. Besides this, three guiding channels located on the disc, which pass through the centre and which are used to realize a renewal of a biofilm layer when the live biofilm layer needs to be renewed, are improved. Components that can prevent interruptions in tie rods that might occur, and breakages and a folding of a main return shaft, are developed.

A heat transfer wastewater treatment system utilizes the heat available in raw wastewater flowing into an outdoor treatment pond or other vessel of a wastewater treatment plant to increase the temperature of effluent that is drawn from the pond or other vessel and is provided to a nitrification vessel after warming, thereby improving ammonia reduction provided by the treatment plant, especially during the winter season. The system utilizes the environmentally sustainable green energy available in the raw influent to provide passive heat transfer for improved wastewater treatment.

A heat transfer wastewater treatment system utilizes the heat available in raw wastewater flowing into an outdoor treatment pond or other vessel of a wastewater treatment plant to increase the temperature of effluent that is drawn from the pond or other vessel and is provided to a nitrification vessel after warming, thereby improving ammonia reduction provided by the treatment plant, especially during the winter season. The system utilizes the environmentally sustainable green energy available in the raw influent to provide passive heat transfer for improved wastewater treatment.

The present invention relates preferably to ways of biologically treating liquids, and devices applicable in this respect. Processes and devices according to the present invention preferably relates to a system for biological treatment of liquid such as water, the system typically comprising a container having first and second gas supplies for creating a first and second circulating flow of liquid and bio-film carriers and preferably also for aerating the liquid. Preferred embodiments of a container according to the invention comprises an outflow channel extending along, and preferably throughout, a perimeter of an upper part of the container, the flow channel having a fluid penetrable wall section facing inwardly so that fluid may flow from the interior of the container, through the fluid penetrable wall section and into the outflow channel, and an outlet for leading fluid out from the outflow channel.

A system and method of treating wastewater. In one embodiment, the system comprises a biological reactor fluidly connected to a source of wastewater and having a treated wastewater outlet, a fixed film biological reactor connected to the source of wastewater and having a fixed film effluent outlet, and a ballasted system fluidly connected to the fixed film effluent outlet. The ballasted system may comprise a ballast reactor tank configured to provide a ballasted effluent, and a source of ballast material fluidly connected to an inlet of the ballast reactor tank. The system may further comprise a bypass line having an inlet fluidly connected to the source of wastewater, a first outlet fluidly connected to the ballasted system, and a second outlet fluidly connected to the fixed film biological reactor, the bypass line configured to bypass the fixed film biological reactor.

A biopellet reactor for marine aquariums. The invention is functionally dependent upon a unique fluidizing plate located between the water inlet port at the base and the media reaction chamber above. This fluidizing plate converts the upward momentum of the incoming water stream into a cyclonic flow in the reaction chamber. This cyclonic flow completely suspends and fluidizes the biopellets within the reaction chamber

A biological nitrogen removal method based on multistage feeding and anoxic/aerobic chambers for adopting a constant flow operation mode, enabling wastewater subjected to primary treatment to enter a first-stage and a second-stage A/O reaction units from two position points; lifting and refluxing an effluent to an influent end of the first-stage units; lifting and refluxing an effluent to an influent end of the second-stage units; and clarifying, separating and discharging an effluent from an outlet end of a third-stage A/O reaction unit. The wastewater treatment mode combines a process based on two-stage wastewater feeding and three-stage anoxic/aerobic chambers with biofilms in different reaction zones, =optimizing and controlling a reflux ratio of each segment according to an amount of organic matters available for denitrification in influent, reducing the impact of hydraulic loading at the cross section in the reactors while removing organic matters and nitrogen-containing pollutants at a low temperature.

A biofilm process is disclosed for treating wastewater containing readily biodegradable dissolved organic matter GP (measured as chemical oxygen demand or COD) and producing surplus biomass from the biofilm process that includes an enhanced polyhydroxyalkanoate (PHA) content. The process comprises directing a wastewater influent containing the readily biodegradable COD (RBCOD) into a biofilm unit process. The PHA content of surplus biomass is enhanced by controlling for a decreased biofilm process specific organic loading rate in combination with controlling phosphorus loading rates relative to the process RBCOD loading rates: (1) controlling the wastewater influent phosphorus loading rate to the biofilm unit process includes maintaining an average RBCOD/P ratio of the influent that is between 200 and 800 g/g; (2) decreasing the process specific organic loading rate includes producing a biofilm unit process effluent having readily separable mixed liquor volatile suspended solids (RS-MLVSS); and (3) separating a portion of the RS-MLVSS from the biofilm unit process effluent and recycling at least a portion of the separated RS-MLVSS back to the biofilm unit process. The combination of the RBCOD/P control and specific loading rate control maintains, on average, the surplus biomass with a PHA content that is greater than 30% gPHA/g VSS.

Systems and methods for treating multi-component waste streams. In general, systems and methods described herein employ a first chamber and a second chamber separated by a barrier and a filtration component that is fluidically connected to the first and second chambers. A waste stream to be treated will flow into the first chamber for treatment of the carbon-containing waste, then into the filtration component for the separation of the stream into a solid waste fraction and a liquid waste fraction.