Hydrolytic acidification-MUCT combined treatment apparatus and method for high-concentration organic waste water

Abstract

The invention discloses a hydrolytic acidification-MUCT combined treatment apparatus and method for high-concentration organic waste water, which belongs to the technical fields of waste water treatment and environmental protection. The hydrolytic acidification-MUCT combined treatment method is an improvement of a traditional MUCT treatment method for waste water, carries out hydrolytic acidification before MUCT treatment and allows sludge in a sedimentation basin to partially return to a hydrolytic acidification tank according to a designed sludge return quantity, thereby improving waste water treatment efficiency, reducing residual sludge amount and effectively saving treatment and disposal cost for residual sludge.

Description

technical field [0001] The invention relates to a wastewater treatment device and method, in particular to a hydrolytic acidification-MUCT combined high-concentration organic wastewater treatment device and method, and belongs to the field of wastewater biological treatment. Background technique [0002] A 2 The / O process is relatively simple. The wastewater flows through the anaerobic tank, the anoxic tank, the aerobic tank and the sedimentation tank in sequence, and the sludge part of the sedimentation tank is returned to the anaerobic tank to achieve the effect of wastewater treatment. The wastewater first enters the anaerobic tank, and the facultative anaerobic bacteria convert the easily degradable organic matter in the wastewater into VFAs (volatile fatty acids), and the phosphorus-accumulating bacteria brought in by the return sludge decompose the accumulated phosphorus stored in the body, and part of the released energy can be The aerobic phosphorus accumulating ba...

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Problems solved by technology

[0004] Wastewater treated by MUCT process has the advantages of synchronous nitrogen and phosphorus removal, strong shock load resistance, low treatment cost, and easy management. However, with the increasingly serious nitrogen and phosphorus pollution and eutrophication of water bodies, the requirements for water treatment processes are also constantly improving. , the effluent nitrogen and phosphorus indicators have also put forward stricter requirements, and the shortcomings of the process have become increasingly prominent.

[0005] MUCT process is in A 2 An anoxic tank is added to the sludge return circuit in the anaerobic zone of the / O process to reduce the nitrate content in the return sludge, but the anoxic zone on the sludge circuit can only use endogenous metabolites as the carbon source for denitrification , the denitrification rate is very slow, and the required volume is large

Moreover, the amount of excess sludge produced by this process is large, the cost of excess sludge treatment and disposal is high, and it is easy to cause secondary pollution and other problems.

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