Chemical depth treatment method applied to antibiotic wastewater treatment

Abstract

The invention discloses a chemical depth treatment method applied to antibiotic wastewater treatment. The method comprises the following steps: (1) enabling effluent subjected to biologic treatment to enter a four-phase catalysis oxidation device with an alloy catalyst, feeding a catalyst and an oxidant, generating hydroxyl radical OH, and performing blowing and aerating; (2) enabling the effluent subjected to reaction to enter an oxidation reaction tank, and continuously carrying out oxidation reaction through micro-pore aeration so as to form a great deal of tawny floccule; (3) feeding 30% of an alkali liquid into a mixture liquid, regulating the pH value of the mixture solution to be neutral, further feeding a coagulant PAC (Poly Aluminum Chloride) and a macromolecule coagulant aid PAM (Polyacrylamide), baffling and collecting the floccule, and enabling the sludge to enter a concentration tank treatment system. The method is simple to operate, low in operation cost and good in elimination effect, thorough elimination of nondegradable COD (Chemical Oxygen Demand), chromaticity and impurities which cannot be degraded through high-efficiency microbiological treatment can be ensured through biologic treatment, and final up-to-standard emission of high-difficulty wastewater of antibiotics can be achieved.

Description

technical field [0001] The invention relates to the field of industrial waste water treatment, and more specifically relates to a high-efficiency advanced treatment method for antibiotic-based waste water with high ammonia nitrogen and high organic content. Background technique [0002] Antibiotic wastewater has high pollution concentration and strong biodegradability. After treatment by microbial treatment technology (anaerobic + aerobic process), antibiotic pharmaceutical wastewater is pretreated + anaerobic and aerobic high-efficiency biological treatment. The effluent concentration is CODcr=200-300mg / l, ammonia nitrogen is 10-20mg / l, which meets the national secondary discharge standard and can enter urban sewage treatment plants, but cannot be discharged directly. [0003] Antibiotic wastewater is refractory wastewater, because its biodegradability ≧ 0.3, that is, high B / C ratio, strong biodegradability, the most energy-saving and effective treatment method is to use bi...

AI Technical Summary

Problems solved by technology

[0003] Antibiotic wastewater is refractory wastewater, because its biodegradability ≧ 0.3, that is, high B / C ratio, strong biodegradability, the most energy-saving and effective treatment method is to use biological treatment technology, that is, anaerobic + aerobic biological treatment method , but due to the limitations of biological treatment, that is, there are quite a few pollution indicators such as COD that cannot be degraded by microorganisms, which still cannot meet the requirements of (GB21903-2008), and further in-depth treatment of pollutants is required, that is, using chemical methods. Non-degradable COD and other pollutants are forced to be completely oxidized and decomposed to ensure that the sewage can be discharged in accordance with national, provincial and municipal environmental protection requirements.

[0004] Conventional single-stage or multi-stage flocculation treatment with aluminum salt or (and) iron salt is easy to operate, but the removal rate is low, the investment is large, and the operating cost is high

Moreover, the amount of sludge produced is large, the sludge is finely divided, it is not easy to dehydrate, and the ability to remove soluble organic matter is poor.

Since the sludge contains aluminum salts, it is easy to cause secondary pollution

In addition, membrane filtration, electrodialysis, reverse osmosis and other oxidation devices are not often used because of their high cost, easy clogging, and difficulty in maintenance and management.

[0005] Antibiotic pharmaceutical wastewater has complex components, high ammonia nitrogen, high salt and high residual toxic substances restrict the operation effect of biological treatment

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