Method for deep denitrification of metaphase landfill leachate through single-stage SBR (Styrene Butadiene Rubber) post denitrification treatment

Abstract

The invention discloses a method for deep denitrification of metaphase landfill leachate through single-stage SBR (Styrene Butadiene Rubber) post denitrification treatment, which belongs to the technical field of sewage treatment by using biochemical process. Aiming at the characteristics that the landfill leachate is high in organism concentration, high in ammonia concentration, high in C / P ratio (grater than 200), the invention discloses a real-time control method with the combination of 'anaerobic / aerobiotic / anoxic' operation modes, and SBR post denitrification is achieved. Under long-term domestication, glycan bacteria (GAO) can be enriched, volatile organic acids (VFA (Volatile Fatty Acid)) in water are converted into poly-beta-hydroxy-alkanoic acid ester (PHA) through glycogen glycolysis at an anaerobic stage by using GAO, in an aerobiotic stage (the dissolved oxygen is less than 0.8mg / L), when partial nitrification is carried out, most part of PHA is converted into glycogen, and in the anoxic stage, the residual PHA and the glycogen are utilized to perform carbon source denitrification, so that the effluent meets the latest national emission standard. The method has the advantages of simple devices, rapid starting, freedom of external carbon source, good denitrification effect, simplicity in operation, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of biochemical sewage biological treatment, in particular to a start-up and stabilization method for biological denitrification treatment of landfill leachate. Background technique [0002] my country is in the midst of rapid urbanization, which directly leads to a substantial increase in urban solid waste. Landfill is the most important way of urban waste disposal. It is also an effective and low-cost urban waste disposal method suitable for my country's national conditions. During the process of urban waste landfill, due to compaction and microbial decomposition, the pollutants contained in the waste will dissolve with water, and together with rainfall, runoff, etc., form landfill leachate. Landfill leachate is a kind of difficult-to-treat high-concentration organic wastewater, which contains a large amount of refractory organic matter, heavy metal ions, ammonia nitrogen and some other toxic substances. I...

AI Technical Summary

Problems solved by technology

The traditional denitrification process is often to mix the nitrification liquid with the influent water, and use the influent carbon source for denitrification. However, using this method to treat high-ammonia-nitrogen wastewater such as landfill leachate will make the effluent unable to meet the discharge standards; post-reaction Nitrification often uses an external carbon source (methanol, etc.) as a denitrification carbon source in the post-anoxic section. However, this method not only increases the operating cost but also makes the organic matter in the effluent

Images