Small integrated wastewater treatment equipment commonly used processes: A/O process, SBR process, CASS process, MBR process. Integrated wastewater treatment equipment is mostly used in the improved AO method and MBR method, the core of both are based on biological treatment, only the MBR process in the end of sewage treatment to add a set of membrane treatment system, so that the effluent quality of wastewater is better and more stable.
China's community per person per day the amount of domestic sewage discharged 150-400L, the amount of living standards are closely related. Domestic sewage contains a large number of organic matter, such as cellulose, starch, sugar and fat protein, etc.; also often contain pathogenic bacteria, viruses and parasite eggs; inorganic salts of chloride, sulfate, phosphate, bicarbonate and sodium, potassium, calcium, magnesium, etc.. The general characteristics are nitrogen, sulfur and phosphorus, high in anaerobic bacteria, easy to produce malodorous substances. Urban sewage water quality is generally CODcr350~500mg/L, BOD 5 150~250mg/L, SS200~300mg/L, TN20~85mg/L, TP4~15mg/L. In view of the current environmental problems are becoming more and more prominent, the state of the sewage treatment requirements are more stringent, according to the local requirements of the domestic sewage discharge standards are generally implemented as follows Standard: urban sewage treatment plant pollutant concentration emission standards GB18918-2002