摘要
针对麻醉原料制药废水有机物浓度高、可生化性差、毒性大等特点,采用铁炭微电解法作为处理该制药废水的预处理工艺,考察了填料粒度、pH值、铁炭比、气水比和负荷等因素对铁炭微电解系统处理效能的影响。结果表明,在进水pH值为3,Fe/C体积比为1:2,铁屑、活性炭粒径为1 mm,负荷为175.5 kgCOD/(m^3铁炭·d),气水比为10:1,反应时间为2 h时,可使进水COD、色度分别为19 000 mg/L及600的制药废水,出水降至8 490mg/L及20,去除率分别为55.29%和96.67%,同时可使废水可生化性得到增大,BOD_5/COD由进水0.14提高至出水0.56。
The paper is aimed at presenting our study results on the influential factors of iron-carbon mlcro-electrolysls process in treating pharmaceutical sewage. As we know, raw medicines for anesthetics usually contain highly concentrated refractory organics and high toxicity, but their biodegradability is usually poor. Since such high- strength refractory organics can not be used as carbon source, it is usually difficult for such sewage to get effectively treated biologically, though several biochemical methods were used such as sulfur-zeolite fixed bed reactor, catalytic inorganic membrane reactor and nanoscale zero valent iron, all of which proved to be limited either because of being too expensive or because of too complicated in structure to op- erate or manage. In spite of this, iron-carbon micro-electrolysis proves to be the most effective one, which helps to improve the biodegradability of the sewage and remove the refractory organisms and toxicity. Seeing the advantages of iron-carbon micro-electrolysis, we hope to improve the iron-carbon micro-electrolysis system to work out an economic and practical technology for effectively treating such sewage. In proceeding with this study, we have done an investigative iron-carbon micro-electrolysis of a sequential batch reactor in the mode of parallel experiments and the granularity of fillings, influent pH, the iron-carbon ratio, the gas-water ratio and the organic content loading. The results of our study show that it proves to be possible for the iron-carbon micro-electrolysis process to improve its removing rate of the chrominanee of pharmaceutical sewage under the conditions of pH 3 with the iron-carbon ratio being 0.5, the granularity of fillings lmm, the organic volume loading being 175.5 kgCOD/（ms iron-car- bon＇d） , and a gas-water ratio 10 and HRT 2 h. Under the influent COD and chrominance of 19 000 mg/L and 600, it is possible to make the effluent up to 8 490 mg/L and 20, respectively, with the removal rate of 55.29% and 96.67%. In addition, the biodegrad- ability of the pharmaceutical sewage can be improved from 0.14 to 0.56.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2011年第4期72-75,共4页
Journal of Safety and Environment
基金
国家水体污染控制与治理科技重大专项(2009ZX07315005-3)
关键词
环境工程学
制药废水
铁炭微电解
色度
可生化性
environmental engineering
pharmaceutical sewage
iron- carbon micro- electrolysis
chrominance
biodegradability
