Process introduction
At present, urban waste treatment is mostly used in the form of sanitary landfill and waste incineration. However, the water in the landfill leachate of the urban waste incineration plant and the waste water generated by waste degradation are much lower than the landfill seepage from most of the natural precipitation. The filtrate has higher indicators of organic matter, salts, heavy metals and other pollutants, making it more difficult to process.
At present, the technologies used to treat landfill leachate from incineration plants mainly include: biological treatment technology, physical and chemical treatment technology, etc. The biological treatment technology is easy to operate and the operating cost is low, but because the leachate contains some toxic substances and anti-biodegradable substances, the biological treatment effect is poor. The physical and chemical methods for landfill leachate mainly include membrane filtration, chemical precipitation, adsorption, etc., but the biggest problem of membrane treatment is membrane fouling, which will block the membrane pores and have a great impact on the treatment efficiency; chemical precipitation is susceptible to Restrictions such as pH value; the adsorption method only transfers pollutants from the water phase to the solid phase, which is likely to cause secondary pollution.
According to its characteristics, the company has developed a set of targeted combined treatment process, and applied for a patent. The patent name is "a combined treatment device for leachate in a waste incineration site", and the patent number is 201220202670.8. The advantages of this process: treatment Large capacity, strong impact resistance, high pollution discharge of landfill leachate in incineration sites, large fluctuations in water quality and water volume, good treatment capacity, good treatment effect, high degree of automation, convenient operation and management, and reasonable operating costs. Due to the use of a combined treatment device and no secondary settling tank, not only the effects of each treatment process section can be fully exerted, but also the complementary and synergistic effect is good. Each process cooperates with each other to ensure the treatment effect and make the effluent water quality meet the "Pollution Control Standard for Domestic Garbage Landfill Sites" "The emission requirements stipulated.

Typical process flow
Landfill leachate→adjusting balance tank→neutralization reaction sedimentation tank→UASB reaction tank→denitrification tank→nitrification tank→ultrafiltration membrane→nanofiltration system→reverse osmosis system→clear water discharge up to standard