摘要
为研究复合式氧化沟对有机废水的处理效能，利用有效容积为120L的模型反应器，研究了复合式氧化沟工艺处理城市污水的特性。结果表明，当HRT从55h逐步变为10h的过程中，复合式氧化沟对生活污水的COD及BOD，去除率分别可以保持在86％和92％以上，对NH4^＋-N的去除率也达到了83％左右。在HRT为20h和25℃左右的室温条件下，即使COD、BOD，和NH4^＋-N的质量浓度分别在125．30～492．00mg／L、56．26～249．44mg／L和20．00-32．91mg／L较大范围内波动，系统对它们的去除率都能保持在90％以上，使出水COD、BOD，和NH4^＋-N质量浓度分别维持在3．74—47．01mg／L、0．93～11．45mg／L和0．28—3．26mg／L的范围，均达到国家要求的一级标准。因此，复合式氧化沟能有效去除污染物，且能较好地适应水质水量的变化，稳定性好，去除效率高，抗冲击负荷能力强。
The present paper is concerned with the authors＇ improved method named oxidation ditch process in treating urban wastewater at room temperature. As is known, the oxidation ditch process is a method to treat urban wastewater more efficiently. However, drawbacks are still exist with the method. In order to investigate its efficiency, a model hybrid oxidation ditch with an available volume of 120 L has been used by the present authors to treat the urban wastewater at room temperature about 25 ℃ . The result of this paper indicates that the hybrid oxidation ditch helps to remove the pollutants efficiently and steadily with its removing rates of COD, BOD5 and NH4^＋ - N within a wide range of organic loading rate. When HRT decreases from 55 hours to 10 hours, the removing rates can be made to reach as high as 86% and 92% for COD and BOD5 respectively, while the removing rate of NH4^＋ - N proves to be about 83 % . When the HRT was kept at 20 hours, both the COD, BOD5 removing rate and the NH4^＋ - N removal rate could be made to reach 90% even if their influent concentration were 125.30 - 492.00 mg/L, 56.26 - 249.44 mg/L and 20.00 - 32.91 mg/L respectively. Thus, the effluent, with a COD, BOD5 and NH4^＋ - N concentration of 3.74 - 47.01 mg/L, 0.93 - 11.45 mg/L and 0.28 - 3.26 mg/L respectively, is up to the state level-1 standard for safe sewage discharge and meet the needs for environment protection.
出处
《安全与环境学报》
CAS
CSCD
2006年第4期23-26,共4页
Journal of Safety and Environment
基金
国家863计划项目(2002AA601310)
河南省科技攻关项目(0424440013)
