摘要
采用缺氧/二级生物接触氧化法(A/BCO)处理食品废水,弥补当前工艺的缺陷,实现投资低、效果稳、污泥少、氨氮和CODcr高去除率.通过对废水中两个主要的指标CODcr和氨氮(NH3-N)的去除率进行水力停留时间(HRT)和气水比(GWR)研究.结果表明,随着HRT的延长,CODcr的去除率呈现较快的增长,之后速度放缓,并且开始呈下降的趋势.同时在此过程中,氨氮的去除率呈现不断上升的趋势,而去除率的增长速度呈不断下降的趋势,最终可以得到结论,最佳水力停留时间为10 h;对GWR而言,随着GWR的不断提高,CODcr去除率是先上升后下降,氨氮的去除率是先升高后平稳再略有下降,最终得到结论,GWR选择为15∶1为佳.
An anoxia /Two-stage biological contact oxidation（A/BCO） was employed for the treatment of food wastewater.Through the experimental observation of the two basilic index of CODcr and NH3-Ns＇ removal rate in the wastewater,it is useful to investigate hydraulic retention time and gas water ratio.The experimental research showed that CODcr removal rate grew rapidly in the beginning and later the growth speed was more and more slowly later.Furthermore,the CODcr removal rate tended to decline.At the same time,in this process,CODcr removal rate showed a rising trend continuously,while the growth speed of removal rate showed a declining trend.It reached a conclusion that the best HRT was 10 h.In terms of the GWR,with the continuous ascension of GWR,the removal rates of CODcr firstly increased and then decreased,the removal rates of ammonia nitrogen increased in the begining and then it kept steady and declined slightly later.The final conclusion was that the best GWR was 16∶1.
出处
《湖北民族学院学报（自然科学版）》
CAS
2011年第2期223-226,共4页
Journal of Hubei Minzu University(Natural Science Edition)
关键词
缺氧/二级生物接触氧化法
食品废水
水力停留时间
气水比
anoxia/two-stage biological contact oxidation
food wastewater
hydraulic retention time
gas water ratio
