With the rapid development of China's livestock and poultry industry, the amount of wastewater is also increasing year by year, and the pollution is increasing. The primary treatment technology of aquaculture wastewater is particularly important. Wastewater from farms generally constitutes pollution of groundwater, environment, soil, etc. If it is directly discharged without treatment, sewage treatment equipment will constitute water pollution and make the water black and stinky. Today we take a look at the technical scheme of the wastewater treatment equipment of the farm.
It is well known that if the wastewater of the farm is assumed to be discharged directly to the ground without treatment, it will infiltrate the surface below the surface, which will briefly damage the environmental balance, cause deterioration of water quality, and pollution of the surrounding environment, and it can severely reduce the sudden quality. The following is a brief introduction by Liu Sili of Jinshuanglian on four treatment methods for wastewater treatment in farms:
The first: natural treatment method, which uses the principle of self-purification of sewage by large nature (natural water bodies, soils, etc.) to play a role. Including land treatment systems and aquatic plant treatment systems. Common biological ponds, soil treatment methods, artificial wetland treatment methods and so on.
The second: artificial anaerobic treatment, anaerobic treatment or biogas project has developed a variety of treatment technologies since the 1950s, mainly based on improving sludge concentration and improving the mixing effect of wastewater and sludge. Development of a series of high-load reactors to treat wastewater. At present, domestic pig farm wastewater treatment mainly adopts upflow anaerobic sludge bed and upflow solid reactor technology. Sewage after anaerobic treatment can be returned to the field as a liquid organic fertilizer if there is land available for use, but often the discharge is relatively large, and transportation and application are not convenient. Generally, it must undergo multi-stage aerobic treatment Post-qualified emissions are appropriate.
The third is the artificial aerobic treatment method. The basic principle of aerobic treatment is to use microorganisms to differentiate organic matter under aerobic conditions to form their own cells (activated sludge). Inorganic matter. Including activated sludge, contact oxidation and biological turntable.
The fourth: anaerobic-aerobic treatment method, pig farm wastewater is more difficult to treat organic wastewater because of its large displacement, low temperature, solid and liquid turbidity in wastewater, high organic content, rich nitrogen and phosphorus content, and it is not easy Removal, it is difficult to achieve the emission requirements simply by physical, chemical or biological methods.
As a systematic project, the treatment of aquaculture wastewater needs to comply with ecological principles and combine a variety of treatment methods to form a scientific comprehensive application. After the treatment is qualified, the water on the pig farm is recycled, which effectively improves the breeding environment and reduces the control of the surrounding environment.