1, sewage pre-treatment: the sewage from methadone clinic will be preliminarily solid-liquid separation to remove large particulate matter and suspended matter, which can be pre-treated by using equipment such as sedimentation tanks or grids.
2, sewage biological treatment: the pre-treated sewage will be sent to the biological treatment system, such as activated sludge method, anaerobic pool - aerobic pool (CC-ASP) method, biological contact oxidation method. These methods utilize microbial metabolism to decompose organic matter into harmless substances.
3, deep treatment: further processes can be used, such as membrane bioreactor (MBR), reverse osmosis (RO) and so on. These technologies can effectively remove finer particles, microorganisms and dissolved substances.
4, disinfection treatment: disinfection of treated sewage to kill bacteria, viruses and other pathogens. Commonly used disinfection methods include ultraviolet radiation, chlorine disinfection and so on.