What is the difference between the small integrated purification tank and the rural septic tank?

　　Purification tank is a small domestic sewage treatment device, mainly used for the treatment of domestic sewage or similar sewage.

　　The purification tank originated in Japan in the mid-1950s, and is a device to purify the domestic sewage discharged from the family. In China, purification tanks that can only treat toilet sewage are called septic tanks, and purification tanks that can treat mixed sewage are called small integrated sewage treatment devices.

　　Small integrated purification tank is mainly used for the treatment of decentralized domestic sewage or similar domestic sewage, which can achieve local treatment and local discharge standards, and reduce the integrated device of pipe network laying.

　　Purification tank and septic tank are not exactly the same, there are some differences in terms of function, structure, price and other aspects.

　　So what are the differences between the purification tank and the rural septic tank?

　　First look at the function: septic tank is mainly used to collect toilet sewage device; purification tank is sewage collection + purification treatment device, can collect toilet, kitchen, shower and other domestic sewage.

　　Its process principle: septic tank mainly uses the principles of airtight anaerobic fermentation, liquefaction, ammonification, biological antagonism to remove and kill parasitic eggs and bacteria, control mosquito and fly breeding, so as to achieve the effect of harmless feces. The main principle of purification tank is hydrolysis and contact oxidation, and remove solid particles or floating through precipitation separation tank and anaerobic filter tank.

　　The guaranteed effluent quality: the effluent quality of septic tank is generally below the level B standard in Pollutant Discharge Standard of Urban Sewage Treatment Plant (GB18918-2002); the rural domestic sewage treated after purification tank can meet the level B standard in Pollutant Discharge Standard of Urban Sewage Treatment Plant (GB18918-2002), and even some purification tanks can reach the level A standard.

　　Purification tank and septic tank can be organically combined, the septic tank and sewage treatment organically combined, using aerobic biochemical technology and intelligent control equipment for harmless treatment of domestic sewage. The domestic sewage of the villagers flows into the septic tank cavity through the small pipe network for decomposition and acidification. After preliminary decomposition and treatment, it enters the biochemical cavity with biological bacteria and automatic aeration facilities for aerobic treatment, and the standard water will be discharged automatically after treatment. The purification tank does not need manual operation, complete automatic control, automatic aeration and automatic water outlet, the degraded water quality can reach the class II water standard, and can be fully recycled from the vegetable greenhouses in the backyard of irrigation farmers.