Sewage water and sludge co-processing emission-reducing process and system

Abstract

The invention discloses an emission reduction process and an emission reduction system for co-processing sewage and sludge. The system mainly comprises an anaerobic reactor, an anoxic reactor and an aerobic membrane bioreactor; the auxiliary equipment comprises an anoxic zone stirrer, a sludge reflux pump, a membrane bioreactor water outlet pump and an automatic control device; a reaction tank body is made of concrete, PVC or glass steel; the process is characterized in that the sludge mixed liquor in the aerobic membrane bioreactor can be flown back to backwater ports of the anaerobic reactor and the anoxic reactor through the sludge reflux pump, so that the sewage and the sludge are subjected to three processes of hydrolytic acidification, acid production and methane production; and denitrification is performed in the anoxic reactor, thereby realizing reduction and reclamation of the sludge and achieving the aims of removing the sewage and the sludge and reducing emission. The process and the system are suitable for processing of the sewage and the sludge from treatment plants in different scales.

Description

technical field [0001] The present invention relates to the treatment of water, waste water or sludge, in particular to the biological treatment of water, waste water or sewage. Background technique [0002] Regarding sludge treatment and disposal, most sewage treatment plants use biological treatment processes, including anaerobic and aerobic processes. This type of process, especially the aerobic process, produces a large amount of residual sludge, which needs to be discharged and treated regularly. The amount of sludge (dry weight) discharged by my country's sewage treatment plants is about 1.4 million tons per year, and it is increasing at a rate of more than 10% per year. The problem of environmental pollution caused by sludge has become increasingly prominent. Sludge contains a large amount of toxic and harmful substances such as heavy metals and pathogenic bacteria, which has caused great safety hazards, environmental pressure and economic burden. [0003] Domestic ...

AI Technical Summary

Problems solved by technology

[0008] The degree of sludge stabilization treatment is relatively low. An important reason is that for medium and small-scale sewage plants, the cost of building a sludge digestion treatment system alone is high, the benefits are not significant, and operation and management are inconvenient.

Images