A treatment method for improving the centrifugal dehydration efficiency of anaerobic sludge

Abstract

The invention discloses a treatment method for improving the centrifugal dehydration efficiency of anaerobic sludge. The treatment method comprises the following steps: mixing anaerobic sludge and aerobic sludge to obtain mixed sludge; aerating the obtained mixed sludge , so that the dissolved oxygen concentration in the mixed sludge is stabilized at 1.5mg / L to 2.5mg / L, and the treatment of anaerobic sludge is completed. Compared with conventional methods, the anaerobic sludge treated by the method of the present invention does not need to frequently adjust operating parameters when using centrifugal dehydration equipment for dehydration treatment, and can quickly and effectively realize centrifugal dehydration of anaerobic sludge, centrifugal dehydration The efficiency is significantly improved, which not only helps to reduce the working intensity and workload of technicians, but also helps to improve production efficiency, reduce processing costs, and obtain greater benefits. It has the advantages of simple process, convenient operation, and low cost. value and good application prospects.

Description

technical field [0001] The invention belongs to the technical field of high-concentration leachate treatment, and relates to a treatment method for improving the centrifugal dehydration efficiency of anaerobic sludge. Background technique [0002] The process route of UASB (anaerobic reactor) + external MBR (membrane bioreactor) is the mainstream process for treating high-concentration leachate in waste incineration plants. In order to ensure the removal efficiency of pollutants in each reactor, it is necessary to maintain the reactor The appropriate sludge concentration in the tank can avoid the insufficient dissolved oxygen in the system, the rise of sludge foam, and the pollutant removal rate (COD cr , ammonia nitrogen) and other process indicators are abnormal, so it is necessary to regularly discharge the excess sludge from the anaerobic reactor and membrane bioreactor. [0003] After the anaerobic sludge in the UASB reactor of the incineration plant and the aerobic sl...

AI Technical Summary

Problems solved by technology

Under normal circumstances, the amount of sludge discharged from aerobic sludge is much greater than that of anaerobic sludge, and due to the difference in the mechanism of removing pollutants between anaerobic reactor and membrane bioreactor, the difference between anaerobic sludge and aerobic sludge There is a big difference in the properties of sludge, specifically: anaerobic sludge is black, granular, with high sludge load, odor, and poor flocculation effect; aerobic sludge is golden yellow, flocculent, and earthy , low sludge load, good flocculation effect

Based on the large difference in the amount and properties of the above-mentioned anaerobic sludge and aerobic sludge, when it is necessary to dewater anaerobic sludge, it is usually mixed with anaerobic sludge and aerobic sludge for dehydration treatment At the same time, due to the fluctuations in the amount of sludge and sludge properties of anaerobic sludge and aerobic sludge in the actual treatment process, the adverse effects are: On the one hand, the dehydration process requires technicians to constantly Adjust the operating parameters of the centrifuge (such as sludge feed amount, flocculant dosage, auxiliary machine speed, etc.) to meet actual needs, which will undoubtedly increase the work intensity and workload of technicians; on the other hand, if not timely If the operating parameters of the centrifuge are adjusted, the moisture content of the dewatered sludge will be too high, which will not meet the requirements for final disposal, and there will be a large safety and environmental hazard; at the same time, based on the unstable operation of the centrifuge, there will also be Reduce the processing capacity of the centrifuge. If the sludge cannot be processed in time, there will be a greater risk of secondary pollution

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