Organic wastewater advanced treatment process

Abstract

The invention provides an organic wastewater advanced treatment process which gradually reduces pollutants through various technologies and finally enables discharge and recovery of the wastewater to reach the standards. The process comprises the following steps of a) acid-base adjusting treatment; b) pre-flocculation treatment; c) Photo-Fenton pre-treatment; d) anaerobic hydrolytic acidification treatment; e) treatment in an XLT-PC system; f) after-flocculation treatment; g) Photo-Fenton after-treatment; and h) discharge or recovery of effluent in the step g). Compared with the prior art, the organic wastewater advanced treatment process has the beneficial effects that by reasonably configuring the treatment steps, higher load capacity can be provided at the same cost, the yield of pollutants is greatly reduced, and the treated water bodies have excellent quality; and the process is especially suitable for treating sewage in the industries such as printing and dyeing, food, electronics, biological medicine and the like.

Description

Technical field [0001] The invention relates to a process for the treatment of organic wastewater and sewage, in particular to a multi-stage process for the treatment of organic wastewater and sewage. Background technique [0002] At present, the generally adopted treatment methods for refractory organic wastewater are: [0003] 1) Physical and chemical methods, such as: coagulation sedimentation (air flotation) method, membrane separation method, air stripping method, extraction method, etc. [0004] 2) Biochemical methods, such as: aerobic activated sludge method, PAM-activated sludge method, anaerobic-aerobic process and membrane bioreactor, etc. [0005] 3) Chemical methods, such as: redox method, wet oxidation method, chemical incineration method, etc. [0006] Related organic wastewater treatment methods also include: [0007] 4) Iron-carbon micro-electrolysis method, based on the battery reaction mechanism in electrochemistry, the electrode reaction is as follows: anode (Fe): Fe→...

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Problems solved by technology

[0012] However, in the case of only using one of the above-mentioned wastewater treatment methods, or unreasonably combining the above-mentioned wastewater treatment methods to obtain the wastewater treatment process, it is impossible to obtain ideal results in practical applications. The actual situation of enterprises currently deploying wastewater treatment is difficult so so

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