High-concentration colored sewage treatment system and method

Abstract

The invention discloses a high-concentration colored sewage treatment system and method. The system comprises a hydrolytic acidification device, an anaerobic reactor, a sludge treatment device, an activated sludge reactor, a biological aerated filter and a photocatalytic oxidation reactor; a second overflowing weir is communicated with a hydrolytic acidification pool through a reflux pipe, and a water inlet pipe is provided with a jet hole and an adjusting valve. The treatment method comprises the step that hydrolytic acidification, anaerobic fermentation, sludge treatment, aeration treatment and photocatalytic oxidation treatment are sequentially conducted on sewage. According to the high-concentration colored sewage treatment system and method, by arranging the jet hole on the sludge treatment device to adjust the dissolved oxygen content of the reaction liquid level, it is guaranteed that nitrite is generated through reacting, generated nitrite flows back into the hydrolytic acidification pool, and therefore the phenomenon that the acidity of the acidized sewage is overhigh is avoided; in addition, the reacted sludge is treated through the activated sludge reactor, the reacted sludge and sewage are treated through the activated sludge reactor, the biological aerated filter and the photocatalytic oxidation reactor separately, and therefore the sewage treatment efficiency and degradation efficiency are improved.

Description

technical field [0001] The invention relates to sewage treatment technology, in particular to a high-concentration colored sewage treatment system and method. Background technique [0002] Conventional anaerobic sludge reactors include UASB, EGSB, IC, etc. The principle of wastewater treatment is basically that the sewage to be treated is introduced into the reactor as uniformly as possible, and the sewage entering the reactor is mixed with granular or flocculent sludge The contact reaction occurs, and part of the biogas (mainly methane and carbon dioxide) produced by the reaction adheres to the sludge, moves upward with the biogas, and hits the three-phase separator to realize the three-phase separation of solid, liquid and gas. The mixture of sewage and sludge treated in the anaerobic sludge reactor is generally treated with ammonia nitrogen through the SBR reactor. [0003] However, in the actual treatment process of high-concentration colored sewage, on the one hand, th...

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Problems solved by technology

[0003] However, in the actual treatment process of high-concentration colored sewage, on the one hand, the anaerobic sludge reactor needs to be treated by hydrolysis and acidification before, and the hydrolysis and acidification treatment will easily lead to high acidity of the sewage, thereby inhibiting the anaerobic sludge reactor. growth, which is not conducive to the improvement of the sewage treatment efficiency in the anaerobic sludge reactor, which in turn leads to a decrease in the overall treatment efficiency. Although it can be solved by adjusting the pH value during the hydrolytic acidification process to reduce the acidity, it will easily lead to an increase in production costs. , which is not conducive to the reduction of sewage treatment costs; on the other hand, the sewage treated by the SBR reactor still has the problem of incomplete treatment of organic matter

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