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Anaerobic lagoons should retain and treat wastewater from 20 to 150 days. [8] Lagoons should be followed by aerobic or facultative lagoons to provide further required treatment. [ 11 ] The liquid layer is periodically drained and used for fertilizer.
Facultative stabilization ponds may also be used for treatment following other types of treatment processes such as upflow anaerobic sludge blanket (UASB) reactors, oxidation ditches or aerated lagoons. Compared with anaerobic ponds, facultative ponds are shallower (1.5 to 2.5 m deep) and have much larger surface areas.
Aerated lagoon; Aerobic granular reactor; Aerobic granular sludge technology; Aerobic granulation; Aerobic treatment system; Anaerobic clarigester; Anaerobic digester types; Anaerobic digestion; Anaerobic filter; Anaerobic lagoon; Anammox; API oil–water separator; Belt filter; Bioconversion of biomass to mixed alcohol fuels; Biofilters ...
A treatment pond is intended to provide wastewater treatment to achieve a certain effluent quality. Ponds are depressions holding water confined by earthen structures. Kinds of treatment pond include: Aerated lagoons rely upon mechanical aerators providing oxygen to reduce the organic content measured as biochemical oxygen demand (BOD).
Facultative lagoon (polishing pond) providing tertiary treatment after a constructed wetland in Hamburg-Allermöhe, Germany. Overflow from the facultative lagoon may be routed through one or more polishing ponds supporting lower populations of anaerobic micro-organisms and a higher proportion of aerobic organisms adapted to survival in lower concentrations of organic material.
Agricultural wastewater treatment is a farm management agenda for controlling pollution from confined animal operations and from surface runoff that may be contaminated by chemicals in fertilizer, pesticides, animal slurry, crop residues or irrigation water. Agricultural wastewater treatment is required for continuous confined animal operations ...
Polishing is also an example. The main by-product from wastewater treatment plants is a type of sludge that is usually treated in the same or another wastewater treatment plant. [2]: Ch.14 Biogas can be another by-product if the process uses anaerobic treatment. Treated wastewater can be reused as reclaimed water. [3]
Comparison of common AD digester technology types. The following is a partial list of types of anaerobic digesters.These processes and systems harness anaerobic digestion for purposes such as treatment of biowaste, animal manure, sewage and biogas generation. [1]
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