I. Stabilization pond
Stabilization pond is a kind of artificial impervious layer and embankment, which uses the metabolic activity of microorganisms in water to make a series of physical and chemical reactions of pollutants, such as fungi, bacteria, algae and protozoa, so as to effectively remove and degrade pollutants. The outstanding advantages of this treatment technology are no sludge treatment, less investment and low operating cost; Its disadvantages are that it is greatly influenced by climate, occupies a large area, has low load and the treatment effect is not stable enough.
Second, biofilm domestic sewage treatment
The integrated fluidized bed biofilm domestic sewage treatment device has more advantages than the traditional AAO process in treatment effect, automation degree and impact load resistance. The equipment integrated with MBR has mutual advantages, but the cost is relatively low. It is a process and equipment with certain advantages and strong applicability to meet the needs of the future market. Widely used in urban and rural residential areas, communities, hotels, restaurants, resorts, schools, office buildings and other daily sewage treatment and reuse. It is also suitable for the treatment of black and odorous water bodies and the upgrading of various domestic water treatment facilities. Efficiently remove pollutants such as COD, SS, ammonia nitrogen, total nitrogen, BOD and total phosphorus. At present, the equipment has been applied in Shuangfeng, Loudi, and a series of patents have been granted.
Third, modular anaerobic+constructed wetland
Qingzhiyuan adopts a unique "anaerobic-constructed wetland" ecological combination system to treat rural domestic sewage and rainwater. By sampling and analyzing the water quality of each process, the treatment effect is evaluated. The comprehensive results show that the average removal rates of COD, NH+4-N [O], TN and TP are 63.2%, 46.65%, 53.0% and 44% respectively. The results show that the combined system has good removal effect on various pollution indexes, low project investment, convenient management and good ecological landscape benefits, and is suitable for popularization and application in rural families.