A system for mixing and mixing processes and structures are disclosed. In addition a nozzle used for mixing is disclosed.

The present disclosure provides a water treatment module, a bioreactor comprising one or more of such modules and a receptive water treatment system. Also provided herein is a method making use of the above module, bioreactor and system. The water treatment module comprises (i) at least one elongated gas enclosure comprising a gas inlet and two vertical walls, at least one vertical wall comprising a water-impermeable and gas-permeable membrane having a water-facing side and a gas-facing side, the two vertical walls separating between water external to the enclosure and gas within the enclosure, the gas enclosure being in a rolled or folded configuration to thereby define a convoluted horizontal path and one or more water-treatment spaces formed between opposite water facing sides of the enclosure; and (ii) a diffuser arrangement comprising gas diffusers configured for introducing a stream of gas into the one or more water treatment spaces.

A method of treating waste activated sludge. More specifically, the disclosure concerns treating waste activated sludge by a membrane aerated sludge digester to reduce of volatile soluble solids (VSS) concentration in the sludge to obtain aerobically treated sludge.

A water treatment method treats raw water (water to be treated) containing organic wastewater. The method includes (i) an aeration process performs an initial absorption treatment by aerating the water to be treated, (ii) a filtration process for filtering the water to be treated which has been treated by the initial absorption treatment in the aeration process, (iii) a digestion treatment process for digesting solids captured by the filtration process, (iv) a biological treatment process for denitrifying, with activated sludge, filtered water obtained through the filtration process, (v) a sludge transfer process for sending the activated sludge from the biological treatment process to the aeration process, and (vi) an adjustment process for adjusting an amount of the activated sludge sent to the aeration process via the sludge transfer process based on a nitrogen concentration of treated water which has been biologically treated by the biological treatment process.

A bio-enhanced deodorization equipment includes a main body and a filler container in the main body. The filler container includes a wall and at least three perforated separator plates vertically arranged in the filler container. A plurality of spaces are formed by the at least three perforated separator plates, and a microbial filler and a carrier filler are accommodated in the spaces in an alternate manner.

A bio-enhanced deodorization equipment includes a main body and a filler container in the main body. The filler container includes a wall and at least three perforated separator plates vertically arranged in the filler container. A plurality of spaces are formed by the at least three perforated separator plates, and a microbial filler and a carrier filler are accommodated in the spaces in an alternate manner.

A system to treat effluent in a septic tank includes filter sections having kerfs. A strainer removes solid debris from the filter for removal without allowing the solid debris to pass. An aerator includes an eight to twelve inch diameter pipe 4 to 6 feet tall matching tank invert height. The aerator has bottom inlet holes, each with an elbow on the outside with a vertical standpipe taking effluent from the clear zone, sending it through the aerator. Air inlet piping is attached to a “T” shaped air diffuser producing bubbles traveling upward through plastic media. Aerator height is field adjusted to approximately 2 inches below static water level. Holes in the upper sidewalls just below the top let air bubbles out sideways. At its top, the aerator has a slotted, sliding, anti-turbulation collar adjusted to be one to two inches above the static water level.

The present invention concerns a biological reactor used in the field of sanitation for the treatment of sewage and industrial wastewater. The solution proposed in this invention is the coupling of two different treatment processes (anaerobic and aerobic) in the same fixed bed reactor. The invention aims to allow for the construction of plants for the treatment of sewage or very compact industrial effluents, where it is possible to achieve high treatment efficiencies with a small implantation area. In addition, due to the combination of the anaerobic and aerobic processes in fixed beds in the same reactor, the system consumes less energy for aeration and generates a smaller amount of sludge, considerably reducing the operating costs of the treatment plant.

The present invention concerns a biological reactor used in the field of sanitation for the treatment of sewage and industrial wastewater. The solution proposed in this invention is the coupling of two different treatment processes (anaerobic and aerobic) in the same fixed bed reactor. The invention aims to allow for the construction of plants for the treatment of sewage or very compact industrial effluents, where it is possible to achieve high treatment efficiencies with a small implantation area. In addition, due to the combination of the anaerobic and aerobic processes in fixed beds in the same reactor, the system consumes less energy for aeration and generates a smaller amount of sludge, considerably reducing the operating costs of the treatment plant.

The invention in one form is directed to an airlift pump that is optimized to transfer large volumes of water using very low pumping head. Specifically, the airlift pump is comprised of a pump inlet and outlet which are both located below pond's surface. The pumping force driving the water flow is supplied by the weight of the volume of water displaced by pressurized air into a vertical pipe, and this energy is dissipated by the friction of the rising bubbles pipe entrance head, plus the frictional effects of the inner pipe wall and the energy contained in the water's exit velocity.