水解酸化-生物接触氧化工艺在抗生素废水处理中的应用

介绍了抗生素废水的难降解、硫酸盐和总氮含量高的特点及其治理的必要性.针对这些特点,水解酸化-生物接触氧化工艺在处理中具有优势.从机理上阐述了该工艺解决上述问题的可行性及实际应用,并进一步指出了需要完善之处.

APPLICATION OF HYDROLYTIC ACIDIFICATION - A BIO-CONTACT OXIDIZING PROCESS FOR LIQUID-WASTE DISPOSAL

The present article introduces an antibiotic liquid waste processing method characterized by using a hard processed, high density sulfate and the total nitrogen. As is known, hydrolytic acidification is a biological contact oxidizing process with a lot of advantages over other currently used methods in disposing liquid waste. First of all, it is beneficial for degrading the large molecules hard to be processed in the liquid waste into easily processed small ones through hydrolytic acidification so as to raise the biodegradability (BOD/COD). Besides, some organic compounds can be used as electron supplier (such as hydrogen and even NH 4 +) as well as electron receiver (such as SO 4 2 ) by the sulfate reducing bacteria (SRB) to breed or remove high strength sulfate in the liquid waste. Secondly, the biological contact oxidation is favorable for microbes to gather and stick to the carriers and in turn the solid retention time (SRT) can be prolonged. Thus, the nitrobacteria with a relatively long SRT can be bred in large numbers to promote the nitrification. As a result, simultaneous nitrification and denitrification in biofilter can be realized to facilitate the removing of nitrogen. Last of all, many large scaled researches both at home and abroad have already shown the feasibility of the hydrolytic acidification in disposing the liquid waste.