吹脱法预处理皮革废水的实验研究  

Experimental study on pretreatment of tannery wastewater by air stripping

作　　者：姜维[1] 王小佳[1] 贾仁勇[1] 夏四清[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境工程学报》2010年第4期789-794,共6页Chinese Journal of Environmental Engineering

基　　金：污染控制与资源化研究国家重点实验室项目(同济大学)(PCRRK08005);国家水体污染控制与治理科技重大专项(2009ZX07317-008-5)

摘　　要：对某皮革厂综合废水进行吹脱预处理实验，综合考察了影响氨氮去除的各个因素（pH值、汽液比、吹脱温度、氨氮初始浓度），同时对该预处理工艺去除铬、SS（悬浮固体浓度）、COD和硫化物的条件进行了优化，并进行了能耗及运行成本估算。结果表明：该厂皮革废水的最佳吹脱工况为pH=11，气液比=1800，温度25—35℃，在此条件下，当进水p（NH3-N）=304．7mg／L、p（Cr）=65．0mg／L、p（ss）=1700mg／L、p（C0D）=2700mg／L、P（s2-）：112．3mg／L时，相应的去除率可达78．1％～83．5％、96．4％、88．2％、45．6％和85．0％，且吹脱法对氨氮具有较高的抗冲击负荷能力，吨水处理成本约为3．61元，可作为皮革废水的预处理工艺。Air stripping was used to pre-treat combined tannery wastewater. In order to get the highest re- moval efficiency of ammonia nitrogen, the influence of the pH value of wastewater, the ratios of air to liquid, the temperature and the initial concentration of ammonia nitrogen were investigated respectively. And the conditions for the removal of Cr, SS, COD and sulfide were also optimized. The result showed that all the main contaminants could be removed effectively when the pH value was 11, and the ratio of air to liquid was above 1 800 at 25 - 35 ℃. Under the recommended conditions, 78.1% - 83.5% of NH3-N, 96.4% of chromium, 88.2% of SS, 45.6% of COD, 85.0% of sulfide were removed respectively as the concentration of contaminants in the influent wastewater was p（NH3-N）=304.7mg/L、p（Cr）=65.0mg/L、p（ss）=1700mg/L、p（C0D）=2700mg/L、P（s2-）：112.3mg/L . And that, in a wide range of initial concentrations, NH3-N could also be eliminated effectively. So it is feasible to use air stripping as the pretreatment process for tannery wastewater.

关 键 词：吹脱 皮革废水 氨氮 铬 硫化物 

分 类 号：X703.1[环境科学与工程—环境工程]