共查询到19条相似文献,搜索用时 187 毫秒
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煤炭脱硫技术是洁净煤技术研究项目之一,它包括燃前脱硫、燃中脱硫和燃后脱硫,本文阐述了煤中硫元素的存在形态及来源,分析了煤炭脱硫的意义,重点介绍了煤炭燃前脱硫技术,包括物理脱硫、化学脱硫和生物脱硫,讨论了该技术的最新研究状况和发展方向,有利于促进我国洁净煤技术的发展。 相似文献
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根据贵州地区镍钼矿性质,在自然界镍钼矿主要以辉钼矿的形式存在,硫主要是以MoS2的形式存在,所以必须先进行脱硫,使不溶于碱的二硫化钼转化为易溶于碱的三氧化钼。焙烧的主要目的是脱硫,影响焙烧产品的质量主要因素有焙烧温度、料层厚度、炉内压力、物料翻转速度、焙烧时间和炉内空气压力及流速等。文章主要论述了影响镍钼矿焙烧质量的因素。 相似文献
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同步生物脱氮除硫过程是以硫化物为电子供体、硝酸盐为电子受体的生物反应,以此为基础研发的新型生物脱氮除硫工艺,可实现对氮硫两种污染物的同时去除,在环境工程上具有重大应用价值.本文综述了同步生物脱氮除硫工艺的发展概况、原理及其主要影响因素,并展望了该工艺的应用前景. 相似文献
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介绍用预曝气+缺氧/二级生物接触氧化法(A/BCO)处理食品废水工程实例。生物接触氧化池采用城市污水处理厂活性污泥接种,水温20~25℃的条件下,培养驯化一个月左右。COD、SS、BOD5和NH3-N的去除率分别为94%、94%、94%和78%,出水可达一级排放标准,过滤消毒后的出水达到城市杂用水水质标准。 相似文献
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《Electronic Journal of Biotechnology》2014,17(4):174-182
BackgroundTreating latex rubber sheet wastewater often leads to the generation of a rotten-egg odor from toxic H2S. To increase the treatment efficiency and eliminate H2S, purple nonsulfur bacteria (PNSB), prepared by supplementing non-sterile rubber sheet wastewater (RAW) with fermented pineapple extract (FPE), were used to treat this wastewater under microaerobic light conditions. The following 3 independent variables: chemical oxygen demand (COD), initial pH and FPE dose were investigated using the Box–Behnken design to find optimal conditions for stimulating the growth of indigenous PNSB (PNSBsi).ResultsThe addition of 2.0% FPE into RAW, which had a COD of 2000 mg L- 1 and an initial pH of 7.0, significantly decreased oxidation reduction potential (ORP) value and stimulated PNSBsi to reach a maximum of 7.8 log cfu mL- 1 within 2 d. Consequently, these PNSBsi, used as inoculants, were investigated for their ability to treat the wastewater under microaerobic light conditions. A central composite design was used to determine the optimal conditions for the wastewater treatment. These proved to be 7% PNSBsi, 0.8% FPE and 4 d retention time and this combination resulted in a reduction of 91% for COD, 75% for suspended solids, 61% for total sulfide while H2S was not detected. Results of abiotic control and treatment sets indicated that H2S was produced by heterotrophic bacteria and it was then effectively deactivated by PNSBsi.ConclusionsThe stimulation of PNSB growth by FPE under light condition was to lower ORP, and PNSBsi proved to be effective for treating the wastewater. 相似文献
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海南岛河流水体纳污分析 总被引:1,自引:0,他引:1
海南岛有大小河流154条,纳污主要来自四大源头:城镇生活污水排放、工业污染源、畜禽养殖污染源、面源(面排放污染源)。2002年海南岛各河流容纳主要污染物的量分别为COD量75 345t、无机氮10 946t、磷酸盐2 477t;河流(河段)纳污量最大的污染源是城镇生活污水排放,COD、无机氮、磷酸盐分别占全岛河流纳污总量的44.89%、45.04%、46.14%。海南岛河流全年监测值中出现超过Ⅲ类水质标准的河段主要是COD、氮的影响,湖库则主要受COD及氮、磷影响;河口水质受氮的影响较大,城市河段主要受氮、磷的污染;城镇生活污水、生活垃圾以及农业面源污染是影响流域水质的主因。 相似文献
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对近年来出现的一些新型生物流化床处理技术的原理和结构特点作了分析。提出生物流化床应向着降低能耗、适应不同水质的处理需要方向发展,介绍了生物流态化技术在废水处理方面的优势。 相似文献