Four rural sewage treatment systems
There are four main types of rural sewage treatment systems, namely artificial wetland treatment system, underground soil percolation purification system, aerobic biological treatment system, and anaerobic biological treatment system.
1、Constructed wetland system
The constructed wetland treatment system generally controls the sewage to be applied to the soil where the soil is often saturated and has swamp plants, using the absorption of plant roots and the action of microorganisms, and multi-layer filtration to achieve degradation. The purpose of pollution and purification of water.
The sewage wetland treatment system is divided into natural and constructed wetland treatment systems. Natural wetlands are natural wetlands. Constructed wetland sewage treatment technology is a new technology based on natural ecological principles to make sewage treatment engineering and practical. This is a composite process that combines natural and manual treatment of wastewater purification.
The wetland treatment system has simple process equipment, convenient operation and maintenance management, low energy consumption, low engineering infrastructure, low operating cost, strong adaptability to the influent load, and can withstand the impact load. The purified effluent water quality is good and stable. However, this kind of process covers a large area, and the smell of surface runoff sewage will be more significant.
2、Soil infiltration treatment system
The soil infiltration treatment system is an artificially enhanced sewage ecological engineering treatment technology. It fully utilizes the physical and chemical properties of soil animals, soil microorganisms, plant roots and soils inhabiting the soil below the surface to purify the sewage. Small sewage land treatment system. Applicable to small sewage treatment projects in villages and towns.
In recent years, the research on underground systems at home and abroad mainly focuses on filling medium, pollutant purification mechanism, operation regulation, etc., but the key factors such as system structure, pollutant migration and transformation, microbial characteristics, and pathogen removal are still lacking. A unified understanding still has problems such as single structure, poor nitrogen removal effect, unstable operation, and easy clogging of soil pores.
3、Aerobic biological treatment system
Aerobic biological treatment system is a commonly used treatment technology in new rural sewage treatment. The method is to supply oxygen to the sewage through a device such as a fan, cultivate biological bacteria and microorganisms, and use the bacteria and microorganisms to decompose most of the organic matter in the sewage into non-polluting substances, so that the sewage can be purified and discharged. In the sewage treatment project, the aerobic biological treatment method has two major categories: activated sludge method and biofilm method.
Compared with the natural treatment system, the biological treatment method has a small footprint, strong ability to resist external influences such as climate, large selection of construction sites, stable treatment and high processing efficiency, but the capital investment and operating costs are relatively high.
4、Anaerobic biological treatment system
The micro-powered buried domestic sewage treatment device uses anaerobic biofilm technology, which generally has low energy consumption and has significant advantages in decentralized sewage treatment projects. Such as Kinglv environmentally friendly buried sewage treatment equipment, has been widely used in 100 tons of rural sewage treatment.
YouTube Video on How Does a Package Wastewater Treatment Plant Work: https://www.youtube.com/watch?v=lxvs26C7m4o