Domestic sewage treatment equipment is equipment used to treat domestic sewage. The small-scale domestic sewage purification biogas digester uses room temperature anaerobic fermentation technology and establishes a new device of class Ⅰ anaerobic fermentation-class Ⅱ facultative digestion and filtration in accordance with the principle of "multi-level arterial flow and progressive degradation". It consists of processes such as anaerobic fermentation, facultative digestion and filtration, sewage reflux and filler.
Working principle of domestic sewage treatment equipment:
The removal of organic pollutants and ammonia nitrogen by a series of sewage treatment equipment mainly depends on the AO biological treatment process in the equipment. The working principle is at level A. Due to the high concentration of organic matter in the sewage and the microorganisms are in anoxic state, the microorganisms are facultative microorganisms. Therefore, the level A pool not only has a certain organic matter removal function, and reduces the organic load of subsequent aerobic ponds. Organic matter concentration decreased, but a certain amount of organic matter and higher NH3-N were still present. In order to achieve further oxidative decomposition of organic matter, and at the same time nitrification can proceed smoothly under carbonization, an aerobic biological contact oxidation pond with a lower organic load is set at the O level. There are mainly aerobic microorganisms and auto-aerobic bacteria (nitrifying bacteria) in the O-level pool. Among them, aerobic microorganisms decompose organic matter into CO2 and H2O; autotrophic bacteria (nitrifying bacteria) use inorganic carbon produced by organic matter decomposition or CO2 in air as a nutrient source to convert NH3-N in sewage into NO-2-N Part of the effluent of NO-3-N, O-level pool returns to the A-level pool, which provides the electron acceptor for the A-level pool and eliminates nitrogen pollution through denitrification.