Apparatus and method for entire journey autotrophy denitrification of digested sludge dewatered liquid biomembrane

Abstract

The invention relates to a biofilm full-rang autotrophic nitrogen removal device of digested sludge dehydrolysis liquid and a method thereof; wherein, the device is provided with a digested sludge dehydrolysis liquid pool, a pre-hypoxia denitrification pool, a short-range biofilm nitrification pool, a sedimentation pool, an intermediate pool and a biofilm anaerobic ammonia oxidation pool; the method consists of the following steps: 1. the pre-hypoxia denitrification pool and the short-range biofilm nitrification pool are started to operate; 2. the biofilm anaerobic ammonia oxidation pool is started; 3. the biofilm full-rang autotrophic nitrogen removal system of the digested sludge dehydrolysis liquid is operated in series. The device is suitable for biological nitrogen removal of wastewater containing high ammonia nitrogen, such as the digested sludge dehydrolysis liquid, late landfill percolate, coking wastewater, monosodium glutamate wastewater, etc. The device realizes efficient biological nitrogen removal of wastewater with high NH4<+>-N and low ratio of C / N, greatly decreases the construction and operation cost of nitrogen removal of wastewater, reduces alkalinity demand of the nitrification, runs stably, operates easily and has stronger shock resistance loading capability; meanwhile, the device is strongly adaptable to temperature fluctuation and toxic substances, which is easy to recover after being restrained.

Description

technical field [0001] The invention belongs to the technical field of biological denitrification of high-concentration ammonia-nitrogen wastewater, specifically a short-range nitrification reaction of digested sludge dehydration liquid rich in ammonia nitrogen in urban sewage plants through dynamic control in a biofilm short-range nitrification tank, and then without organic carbon sources. Under the conditions of existence, in the biofilm anaerobic ammonium oxidation tank, the nitrogen in the dehydration liquid of digested sludge is removed by anaerobic ammonium oxidation reaction (ANAMMOX, AnaerobicAmmonia Oxidation) to complete the whole process of autotrophic biological denitrification, which is suitable for dehydration of digested sludge Biological denitrification of high ammonia nitrogen wastewater such as liquid, late landfill leachate, coking wastewater, and monosodium glutamate wastewater. Background technique [0002] my country's water pollution continues to inte...

AI Technical Summary

Problems solved by technology

The existing biochemical treatment process treats the reflux of the digested sludge dehydration liquid together with the raw water, which greatly increases the nitrogen load of sewage treatment, making it difficult to improve the nitrogen removal efficiency

The metabolic characteristics of anaerobic digestion of sludge and the traditional process of returning the dewatered liquid of digested sludge directly to the sewage system is a major but often overlooked crux of the low nitrogen removal efficiency of many sewage treatment plants

For the dehydration liquid of digested sludge with low C / N, the serious lack of organic carbon source is the barrier that the denitrification efficiency cannot be improved, and the addition of organic carbon source will greatly increase the cost of sewage denitrification

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