Infiltration method for treating garbage

Abstract

This invention discloses a method for treating the leachate of garbage. The method comprises: (1) adding flocculant to the leachate of garbage under a basic condition, and performing flocculation and preprecipitation; (2) performing partial denitrification in a circulatory aeration tank and an aeration column; (3) performing anaerobic treatment in an upflow anaerobic sludge bed reactor; (4) performing aerobic treatment by two-step contact oxidation; (5) treating the leachate in a membrane bioreactor; (6) performing nanofiltration. Water after treatment has a COD value not higher than 10 mg / L, and electrical conductivity not higher than 1000 mus cm, and can satisfy the standard for domestic water.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a sewage treatment method for landfill leachate. Background technique [0002] With the development of the economy, the improvement of people's living standards and the need to increase the government's requirements for environmental protection, sanitary landfill, composting and waste incineration of municipal waste are currently widely used waste disposal methods at home and abroad. However, the landfill leachate sewage produced in the process of landfilling, composting and waste incineration for power generation is a kind of high-concentration organic sewage with large changes in water quality and quantity, imbalanced microbial nutrition ratio, high ammonia nitrogen content, and complex components. The most difficult sewage in the world to meet the standards is not only extremely black and smelly, but also its pollution concentration is 10-100 times that of ordinary urban sewage, di...

AI Technical Summary

Problems solved by technology

However, the landfill leachate sewage produced in the process of landfilling, composting and waste incineration for power generation is a kind of high-concentration organic sewage with large changes in water quality and quantity, imbalanced microbial nutrition ratio, high ammonia nitrogen content, and complex components. The world's most difficult sewage to meet the standards is not only extremely black and smelly, but also its pollution concentration is 10-100 times that of ordinary urban sewage, directly causing serious pollution to the surrounding soil and groundwater. Wherever it goes, plants cannot grow

COD in the leachate can reach up to tens of thousands or tens of thousands of mg / l, ammonia nitrogen (NH 3 -N) is as high as several thousand mg / l, and the BOD / COD ratio is very low, the concentration of refractory organic matter and ammonia nitrogen is very high, and the direct biodegradability is poor, so the effect of the usual direct biochemical treatment is not ideal; and the sewage contains Salts, toxic compounds, and heavy metal ions that are harmful to microorganisms will inhibit the activity of microorganisms and affect the direct biochemical effects of microorganisms. They are difficult to treat high-concentration organic wastewater

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