Blogs
Decentralized rural domestic sewage treatment technology
Distributed rural domestic sewage mainly comes from domestic water, namely toilet water, domestic washing water and kitchen water. Due to the living habits and production mode of rural residents, the water quality and quantity of distributed rural domestic sewage have obvious regional characteristics compared with urban sewage, and the amount of water and the composition of substances in the water are unstable. The water quantity varies greatly day and night, sometimes in a discontinuous state, and the variation coefficient is much higher than the urban variation value. The organic concentration of rural sewage is high, and domestic sewage contains COD, nitrogen, phosphorus and other pollutants, which is highly biodegradable, and the average maximum concentration of COD can reach 500mg/L.
The decentralized rural domestic sewage has the characteristics of large discharge fluctuation, scattered discharge and difficult collection. The conventional centralized sewage treatment technology has the problems of poor discharge effect, unstable operation and high energy consumption. Considering the economic conditions, geographical location and management difficulty of rural and remote areas, it is the development trend of decentralized rural domestic sewage treatment to adopt decentralized rural domestic sewage treatment technology and develop small integrated sewage treatment equipment for treatment according to local conditions.
The treatment technology of distributed rural domestic sewage can be divided into three categories from the process principle: First, physical and chemical treatment technology, mainly through physical and chemical treatment methods to purify the sewage, including coagulation, air flotation, adsorption, ion exchange, electrodialysis, reverse osmosis and ultrafiltration. The second is the ecological treatment system, also known as natural treatment system, which uses soil filtration, plant absorption and microbial decomposition to purify sewage, commonly used are: stabilization pond, constructed wetland treatment system, underground percolation treatment system; The third is the biological treatment system, mainly through the decomposition of microorganisms, the organic matter in the water into inorganic matter, which is divided into aerobic method and anaerobic method. Including activated sludge process, oxidation ditch process, A/O (anaerobic aerobic process), SBR (sequencing batch activated sludge process), A2/O (anaerobic - anoxic - aerobic process) and MBR (membrane bioreactor method), DMBR (dynamic biofilm) and so on.
WET Sewage Treatment Plant Tank
MBF Packaged Wastewater Treatment Reactor
Integrated sewage treatment equipment is based on biochemical reaction, the pre-treatment, biochemical, precipitation, disinfection, sludge reflux and other different functions of the unit organically combined in one equipment, with low capital investment, less space occupation, high treatment efficiency, convenient management and many other advantages, in rural areas has broad prospects for development and irreplaceable advantages. Combined with the current mainstream sewage treatment technology, our company has developed a number of integrated sewage treatment equipment to provide a variety of solutions to solve the problem of decentralized rural sewage treatment. Such as DW Containerized Water Purification Machine, Intelligent Packaged Sewage Treatment Plant (PWT-R, PWT-A), MBF Packaged Wastewater Treatment Reactor, MBF Packaged Wastewater Treatment Reactor, “Swift” Solar-Powered Sewage Treatment Bioreactor. The treatment scale is 3-300 t/d, according to the treatment water quality and installation requirements, Non-standard equipment can be designed to meet more needs.
PWT-A Packaged Sewage Treatment Plant
“Swift” Solar -Powered Sewage Treatment Bioreactor