Cephalo-type waste water processing apparatus and method thereof

Abstract

The invention discloses a cephalo-type waste water processing apparatus, which comprises a primary sedimentation tank, a facultative pool, an aerobic tank and a secondary sedimentation tank; the facultative pool is provided with a diving stirrer or a microscale aeration apparatus; the aerobic tank is provided with a micropore aeration apparatus; a nitrification liquid return pipe is set from the end of the aerobic tank to the head of the facultative pool; and a sludge return pipe is set from the secondary sedimentation tank to the head of the facultative pool. The size proportion of the facultative pool and the aerobic tank is 1:2. A return pipe in the aerobic tank is set from the end to the head inside the aerobic tank. The technical effects of the present invention are that by increasing the capacity of the facultative pool, the stay time of a mixed liquor of sewage and microbe in the facultative pool is longer, therefore the organic nitrogenous is completely ammonificated into ammonia nitrogen; in addition, by setting the return pipe in the aerobic bank, the organic matter flowed into the facultative pool can be dispersed more rapidly towards the back part of the aerobic tank, and the pressure of over-high concentration of the organic matter at the head of the aerobic tank can be relieved.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a treatment device and method for cephalosporin wastewater. Background technique [0002] Pharmaceutical wastewater is one of the most difficult industrial wastewater to treat. Because of different types of drugs and different production processes, the composition of wastewater is quite different. It is characterized by complex components, high pollutant content, high COD concentration, and high concentration of suspended solids. There are many degradable substances. [0003] At present, the A / O process is a relatively simple and common sewage treatment process, such as figure 1 As shown, the entire technological process is divided into primary sedimentation tank, facultative tank (the microorganisms in the tank are in the state of hypoxia or even anoxic, and the dissolved oxygen is generally less than 0.5mg / L), and aerobic tank (the microorganisms in the tank are in the stat...

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Problems solved by technology

[0006] 1. The concentration of organic matter and ammonia nitrogen in cephalosporin sewage is relatively high. After directly entering the system, the front end of the aerobic pool often consumes a large amount of dissolved oxygen due to the high concentration of organic matter and microbial decomposition, resulting in too low dissolved oxygen at the front end of the aerobic pool. (often less than 1mg / L);

[0007] 2. The organic matter in cephalosporin sewage is relatively difficult to degrade, and there are more organic nitrogen. In the case of a small aerobic pool, the conversion of organic matter from large molecules to small molecules may be incomplete, and the release of organic nitrogen may not be complete. , resulting in slow decomposition of organic matter in the aerobic pool, low removal rate of effluent, and ammoniation in the aerobic pool is still going on, consuming part of the dissolved oxygen and affecting the normal amount of dissolved oxygen in the aerobic pool;

[0008] 3. Cephalosporin sewage is antibiotic sewage, which has a certain killing and strong inhibitory effect on microorganisms, so that the sludge properties will not be good, and it is easy to induce the growth of filamentous bacteria. Due to the small size of the facultative pool , then in the case of a short residence time, the mitigation of the impact on the sludge properties and the inhibition of filamentous bacteria are somewhat insufficient.

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