土霉素结晶母液酸化水解过程的研究

Anaerobic Hydrolysis of Terramycin Crystallizing Mother Solution

土霉素结晶母液是一类含高浓度有机物和氮的废水 ,反硝化电子供体相对不足 ,且含有多种生物抑制性物质 .为了提高废水的可生化性、增加可利用反硝化电子供体的数量 ,利用厌氧污泥床对土霉素结晶母液进行了水解处理 ,并对反应的 pH、COD、NH+4 、和SO2 - 4浓度等进行了考察 .水解过程对COD的去除功能不强 ,在HRT1 5h～ 6 0h的条件下 ,COD去除率也仅从 1 0 %提高到 1 6% .由于有机氮氨化和硫酸盐还原作用 ,酸化后废水的 pH值增加 .当HRT超过 2h以后 ,SO2 - 4基本上都被还原成S2 - .采用经过水解的废水进行批量实验 ,结果证明硝化速率和反硝化速率分别比未水解时提高 90 9%和 4 5 2 % .

The terramycin crystallizing mother solution contained high organics and high nitrogen. There were many kinds of bioinhibition in it but not enough electronic donor. Anaerobic hydrolysis of terramycin crystallizing mother solution was completed with up anarobic sludge bed in order to improve the biodegradability of wastewater and electronic donor in it. The variations of pH, COD, NH + 4, and SO 2- 4 were monitored. The COD removal was in a narrow range between 10 % and 16.4 % even when the HRT of the reactor was changed from 1 5 h to 6 h. pH increased because of formation of NH 3 and reduction of SO 2- 4. Most of SO 2- 4 was reduced to S 2- when the HRT was longer than 2 h. Batch experiments on hydrolyzed wastewater demonstrated that reaction rates of nitrification and denitrification increased by 90 9 % and 45 2 %, respectively.