Method for achieving partial short-cut nitrification-Anammox/denitrification of sewage by using sludge fermentation materials

Abstract

The invention provides a method for achieving partial short-cut nitrification-Anammox / denitrification of sewage by using sludge fermentation materials, and belongs to the field of treatment of sewagesludge. A device used by the method comprises a raw water tank, an SBR reactor, a sludge fermentation material storage tank and a residual sludge fermentation tank. The method comprises mixing residual sludge fermentation materials with domestic sewage for treating, and achieving the short-cut nitrification by using the sludge fermentation materials, wherein the inhibition of the sludge fermentation materials on nitrite oxidizing bacteria is far greater than the inhibition of the sludge fermentation materials on ammonia oxidizing bacteria. The method is specifically characterized in that in ananaerobic phase, polyphosphate accumulating bacteria are used for releasing phosphorus by using the sludge fermentation materials and carbon sources in raw water, and storing the inner carbon sources, in an aerobic phase, the partial short-cut nitrification is achieved through real-time control on DO and pH, in an anoxic phase, anaerobic ammonia oxidizing bacteria are used for converting ammonianitrogen and nitrite nitrogen into nitrogen and nitric nitrogen, and heterotrophic bacteria are used for reducing residual nitrite nitrogen and the generated nitric nitrogen into nitrogen by using theinner carbon sources. Through the method, the aeration intensity is reduced; meanwhile, the deep denitrification of the domestic sewage with a low C / N ratio and the reduction of exogenous sludge areachieved.

Description

technical field [0001] The invention relates to a method for realizing partial short-range nitrification-Anammox / denitrification of sewage by using sludge fermented matter, belonging to the technical field of sewage biological treatment. The invention is suitable for the deep denitrification of domestic sewage with low C / N ratio, and can realize the reduction of exogenous sludge. Background technique [0002] The main problems faced by my country's sewage treatment plants are insufficient carbon sources in influent water and low C / N ratios in domestic sewage, making it difficult to meet the needs of traditional biological denitrification. External carbon sources are often required, which not only increases the cost of sewage treatment, but also increases the The output of excess sludge is increased, and every 10,000 m 3 Sewage will produce 5-10 tons of sludge, and the cost of sludge treatment and disposal is huge, accounting for 50-60% of the operating cost of the entire sew...

AI Technical Summary

Problems solved by technology

Most of the existing research focuses on the application of this process in artificial water distribution and high ammonia nitrogen wastewater. Its application in urban domestic sewage still has the following difficulties: 1. It is difficult to achieve short-range nitrification in low ammonia nitrogen wastewater, so it is difficult to convert anaerobic ammonia Oxidation reaction provides nitrite nitrogen; 2. Anammox bacteria are sensitive to environmental conditions, such as temperature, dissolved oxygen, etc.; 3. The process of anammox reaction will be accompanied by the production of part of nitrate nitrogen, and it is difficult to achieve deep denitrification

Images