A method and apparatus for conditioning the settled solids in the bottom of a wastewater filtration tank to reduce the acidification of the sludge and prevent the excessive growth of undesirable biological growth.

A bubble generator including a container having a side wall and a top wall defining a cavity. An insert is located within the cavity defining a gas path with a trap portion. The gas path being in communication with an exit in the container. The cavity including an opening receiving a gas accumulating within the cavity, the gas path allowing the accumulating gas to escape through the exit once the accumulating gas reaches a predetermined level proximate the trap portion.

The present invention relates to a high-precision, high-efficiency recirculation system for preserving multiple-density biomass and attached biofilm in wastewater treatment bioreactors, which is characterized in that it consists of a bioreactor tank in which a central recirculation duct is centrally and vertically disposed, said duct comprising a diffuser cone at the bottom thereof, close to the bottom of a baffle of the bioreactor, and an upper guide cone at the upper end thereof, wherein the central recirculation duct is designed for an inductor/nozzle to be inserted there into up to the limit of the upper wall of the bioreactor baffle, said parts forming together a central assembly containing, in vertical attitude, a drive shaft which comprises, at the upper end thereof, above the inductor/nozzle, sealing means for hermetic sealing at the upper wall of the bioreactor baffle, wherein the upper end of the drive shaft is coupled to a low-revolution motor reducer for rotating the drive shaft, which comprises one or more axial-type impellers, and wherein the lower end of the drive shaft is coupled to a hyperbolic impeller/mixer close to the bottom of the bioreactor baffle.

The present invention relates to a high-precision, high-efficiency recirculation system for preserving multiple-density biomass and attached biofilm in wastewater treatment bioreactors, which is characterized in that it consists of a bioreactor tank in which a central recirculation duct is centrally and vertically disposed, said duct comprising a diffuser cone at the bottom thereof, close to the bottom of a baffle of the bioreactor, and an upper guide cone at the upper end thereof, wherein the central recirculation duct is designed for an inductor/nozzle to be inserted there into up to the limit of the upper wall of the bioreactor baffle, said parts forming together a central assembly containing, in vertical attitude, a drive shaft which comprises, at the upper end thereof, above the inductor/nozzle, sealing means for hermetic sealing at the upper wall of the bioreactor baffle, wherein the upper end of the drive shaft is coupled to a low-revolution motor reducer for rotating the drive shaft, which comprises one or more axial-type impellers, and wherein the lower end of the drive shaft is coupled to a hyperbolic impeller/mixer close to the bottom of the bioreactor baffle.

The disclosure relates to the technical field of energy saving and consumption reduction, and in particular, to a gas-liquid recycling device. A gas-liquid recycling device and a method of using same provided by the disclosure includes a gas-collection hood, a gas delivery pipe and a liquid delivery pipe. A gas inlet port of the gas delivery pipe is connected to the gas collection hood, a gas outlet port of the gas delivery pipe is inserted into a liquid outlet port of the liquid delivery pipe, and a liquid inlet port is located at an end of the liquid delivery pipe opposite to the liquid outlet port.

The disclosure relates to the technical field of energy saving and consumption reduction, and in particular, to a gas-liquid recycling device. A gas-liquid recycling device and a method of using same provided by the disclosure includes a gas-collection hood, a gas delivery pipe and a liquid delivery pipe. A gas inlet port of the gas delivery pipe is connected to the gas collection hood, a gas outlet port of the gas delivery pipe is inserted into a liquid outlet port of the liquid delivery pipe, and a liquid inlet port is located at an end of the liquid delivery pipe opposite to the liquid outlet port.

Transportable wastewater treatment systems and wastewater treatment methods are provided, which employ a clarification unit to treat highly polluted wastewater (e.g., with BODs over 400 mg/l and up to 1500 mg/l) with a small footprint and without elaborate infrastructure or even without grid-based energy sources. The clarification unit comprises an anaerobic digestion unit configured to receive influent and reduce an organic load thereof to yield a first stream, an aerobic anoxic air lift reactor configured to treat the first stream and further reduce the organic load thereof to yield a second stream, and an aerobic unit configured to clarify the second stream and deliver effluent, the aerobic unit comprising a plurality of vertical sheets configured to support growth of algae on biofilm, a sprinkling system configured to sprinkle the second stream onto the vertical sheets, and an organic matter removal unit configured to collect organic mass falling off the vertical sheets.

The disclosure provides a compact and high-rate bioreactor for wastewater treatment comprising a feeding port for introducing a feed of waste material, a reaction zone in liquid communication with the feed port when the bioreactor is in operation and having an aerator to provide an airlift configuration in the reaction zone; a settling zone comprising a separator for separating a liquid effluent from solid particles; a liquid effluent outlet port for withdrawing the liquid effluent; and a solids outlet port for removing solids. Further provided is a spiral separator for use in a bioreactor and a system comprising the bioreactor and a membrane separator to provide hygienic water.

A method and apparatus for conditioning the settled solids in the bottom of a wastewater filtration tank to reduce the acidification of the sludge and prevent the excessive growth of undesirable biological growth.

An apparatus for degrading the organic fraction of sewage by means of active biomass, in particular active sludge particles, comprising: —at least one tank (1) adapted to contain the sewage and said active biomass; —at least one hollow structure (6, 106, 206), adapted to be at least partially immersed in the sewage, provided with at least one first opening (61) for letting in the sewage and with at least one second opening (62) for letting out the sewage, wherein the ratio between the area of the at least one first opening (61) and the area of the at least one second opening (62) is equal to at least 5:1; —air delivery means (7, 70) adapted to introduce air inside said at least one structure (6, 106, 206); wherein said at least one first opening (61) is proximal to said air delivery means (7, 70) and said at least one second opening (62) is distal from said air delivery means (7, 70), so that the air delivery means (7, 70) are adapted to generate a flow of sewage from said at least one first opening (61) to said at least one second opening (62).