A bioprocess comprises regulating pH of trade effluent wastewater, adding and mixing a first bio-additive, adding and mixing a flocculant/coagulant, filtering through a filter device, adding, mixing of a second bio-additive with aeration, and adding and mixing of a third bio-additive with aeration. Treatment can be discontinued or continued by adding and mixing of hydrogen peroxide with aeration, and optionally exposing treated effluent to UV disinfectant. The treated effluent can be recycled or disposed. Compositions of bio-additives 1, 2 and 3 comprise a group of highly selective and effective microorganisms and enzymes that are immobilized on carrier support matrices from a group of alginate, chitosan, polyacrylamides, k-carrageenan and agarose.

A cover system for a storage pond formed using a liner is disclosed. A cover flap, a liner flap and an anchor flap are preassembled either off-site at a factory or on-site. The anchor flap is disposed in an anchor trench and the anchor trench is backfilled. The liner is deployed and the perimeter is welded to the liner flap. The cover is deployed and the perimeter is welded to the cover flap. The above welding is preferably fusion welding and could take place in any order.

An eFuels plant and process for producing synthetic hydrocarbons using renewable energy are disclosed. The eFuels plant comprises a hydrocarbon synthesis (HS) system and a renewable feed and carbon/energy recovery (RFCER) system. A process for treating wastewater in the eFuels production system comprises adding wastewater streams from the HS system to an anaerobic buffer tank to produce an inventory of untreated wastewater. The relative amounts of the HS system wastewater streams are controlled such that the inventory of untreated wastewater has a target chemical oxygen demand (COD) and/or a target biochemical oxygen demand (BOD). A first amount of the inventory of untreated water is added to an anaerobic biodigester to produce a first treated water stream and a biogas stream, and a second amount of the inventory of untreated water and the first treated water stream are added to an aerobic buffer tank to produce an inventory of aerobic feed water. The relative amounts of the first treated water and the untreated water added to the aerobic buffer tank such that the inventory of aerobic feed water are controlled such that the inventory of aerobic feed water has a target COD and/or a target BOD. A portion of the inventory of aerobic feed and an amount of air to an aerobic biodigester to produce a second treated water stream and a first sludge.

An aerobic treatment system is disclosed herein in which an aerobic holding treatment tank, having an inlet adapted to receive wastewater and an outlet adapted to discharge treated wastewater therefrom, is in communication with an aeration pump having an inlet nozzle in communication with the aerobic holding treatment tank for providing a source of air to the contents of the aerobic holding treatment tank. The aerobic treatment system may further include a generation pump disposed below ground level and in fluid communication with the aerobic holding treatment tank. The generation pump is provided in fluid communication with a high pressure pump in fluid access with an evaporator fan and misting nozzle. The system may further include electronics to connect to grid power, backup electronics for connection to auxiliary power sources, and at least one solar collector for providing a source of electricity.

Moving bed media serving as a growth surface for bacteria that remove soluble carbonaceous BOD, soluble inorganic ammonia nitrogen, phosphorous, nitrate nitrogen or nitrite nitrogen from wastewater are contained in a variable liquid depth, variable volume, hydraulic flow equalization basin. The equalization basin can be divided into different treatment sections by installing separator screens. Fat accumulation on the moving media, which could cause the media to float or in some other way cause the media to be ineffective, can be prevented by a fat, oil, and grease removal process in a dissolved air flotation cell upstream of the flow equalization basin containing the moving bed media. The moving bed media are retained in the basin by a suitable media screen as the liquid level and volume increases or decreases in the basin depending upon the effluent pumping rate vs. the influent flow rate.

A high-load organic wastewater dark fermentation biohydrogen production device and a hydrogen production method are provided. An exhaust port of the production device is communicated with a gas collection region through a gas pipe; a return inlet is arranged at a bottom; a baffle plate is arranged in a two-phase separation device; the baffle plate has a helical shape that makes influent water form a helical centripetal water flow path; one end of an inert gas communicating pipe is connected with an air hole at a bottom of the gas collection region; the other end of the inert gas communicating pipe is communicated with an air intake disc; the inert gas communicating pipe is provided with a connecting hole and an air pump; and the gas collection region is connected with a gas buffer tank and a hydrogen storage tank in sequence. A two-phase separation unit is also provided.

Embodiments described herein are directed to methods and systems for treating wastewater or storm water using vermifiltration. The wastewater can come from various sources, such as agricultural sources, municipal and industrial sources, wineries, the dairy industry, and many others. The systems can include vermicomposting beds that are capable of removing high amounts of contaminants, pollutants, and/or toxic substances from wastewater. The wastewater may be applied to vermicomposting beds, for example, by an irrigation system. The irrigation system may provide, for example, improved bed coverage and more even saturation. The vermicomposting beds can remove various harmful substances from the wastewater, such as petroleum products; industrial chemicals; heavy metals (e.g., lead, mercury, cadmium, arsenic); pesticides (e.g., atrazine, chlorpyrifos); and organic compounds (e.g., phenols, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs)).

A high-load organic wastewater dark fermentation biohydrogen production device and a hydrogen production method are provided. An exhaust port of the production device is communicated with a gas collection region through a gas pipe; a return inlet is arranged at a bottom; a baffle plate is arranged in a two-phase separation device; the baffle plate has a helical shape that makes influent water form a helical centripetal water flow path; one end of an inert gas communicating pipe is connected with an air hole at a bottom of the gas collection region; the other end of the inert gas communicating pipe is communicated with an air intake disc; the inert gas communicating pipe is provided with a connecting hole and an air pump; and the gas collection region is connected with a gas buffer tank and a hydrogen storage tank in sequence. A two-phase separation unit is also provided.

The present disclosure provides a multi stage activated sludge system for biological wastewater treatment, having improved sludge settling properties, the multi stage activated sludge system comprising: an MABR tank comprising an MABR module, an MABR tank aeration unit configured for periodically aerating mixed liquor within the MABR tank, and an outlet from the MABR tank configured for selectively discharging partially settled sludge from the MABR tank, thus selecting for faster settling sludge.

Provided herein are systems and methods for treating a wastewater stream. In one embodiment, a wastewater stream is treated using a settling tank, a membrane feed tank, and at least one filtration unit.