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城市污水处理工艺及其发展 总被引:10,自引:1,他引:10
介绍国内外目前运用较多和正在开发、研究的城市污水一级、二级、三级处理工艺流程 ,讨论了这些工艺的发展状况和发展趋势 ,介绍了一些适用于我国城市污水处理的新工艺。指出 ,在我国 ,一级污水处理工艺以混凝沉淀强化法的应用较多。二级污水处理中 ,鼓风曝气的完全混合式活性污泥法和氧化沟工艺适用于日处理能力大于 2 0万t的城市污水处理厂 ,日处理能力在 5万~ 2 0万t的污水处理厂可以采用鼓风曝气的完全混合式活性污泥法、氧化沟工艺及SBR工艺 ,日处理能力在 1万~ 5万t的污水处理厂总体上以活性污泥法为主。常规处理工艺比较适用于三级污水处理工艺。 相似文献
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污水处理厂的安全自控系统 总被引:2,自引:1,他引:1
随着污水处理行业的快速发展,污水处理厂安全越来越成为工艺稳定运行的关键.针对控制系统本身的安全性及对相应控制设备和工艺的安全性,提出了污水处理厂的安全自控系统原则.并以实际自控系统为例,说明安全自控系统的组成及实现. 相似文献
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脱墨废水处理工程实例 总被引:2,自引:0,他引:2
介绍絮凝气浮-UASB-接触氧化工艺在处理脱墨废水中的应用。运行结果表明,进水CODCr=5000mg/L,BOD5=2000mg/L,SS=2500mg/L时,出水达到《污水综合排放标准》(GB8978-1996)的一级排放标准。 相似文献
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采油污水处理工艺探讨 总被引:3,自引:0,他引:3
针对采油污水的水质特点,以及其中有机污染物的组成,结合现有处理工艺,确定了以生化法降解有机污染物为核心的处理工艺,实现了达标排放,并对处理工艺适用性进行了分析。 相似文献
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BAF工艺处理焦化废水研究 总被引:5,自引:0,他引:5
采用单级BAF工艺进行焦化废水处理试验,以水力负荷为控制参数,在正常pH、温度、营养比等条件下,考察BAF对焦化废水的处理效果。结果表明,当水力负荷小于0.2m3/(m2·h)时,BAF能有效地去除焦化废水中的CODCr、酚、氰,去除率均大于90%,其中出水CODCr达到GB13456-92国家二级排放标准,酚、氰低于国家一级排放标准。但其对NH3-N去除效果较差,甚至出水浓度高于进水浓度。此外单级BAF也不能脱去焦化废水的色度,处理后的废水仍为浅酱油色。要使出水达标排放,需采用两段BAF:其中一段为脱碳滤池(除COD),另一段为硝化滤池(脱氮)。 相似文献
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The Fukashiba Treatment Plant Kashima Rinkai Specified Sewage Works has received wastewater from the petrochemical complex (90%) and public sewage of Kamisu and Hasaki town (10%). For this reason, the plant is facing many difficulties in producing good quality effluent. In order to solve these difficulties, we are reviewing the treatment performance and making efforts for its improvement with nitrification inhibition, control of bio-persistent substances and the PRTR approach. 相似文献
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通过对净水厂生产排泥水的产生和水质特性进行分析,确定沉淀池排泥水和滤池反冲洗废水为净水厂排泥水的主要组成,结合设计干泥量的计算确定排泥水处理规模,在分析排泥水处理系统工艺流程布置特点的基础上对排泥水收集、调节、浓缩和脱水工艺进行分析,并对其中排水池、排泥池、浓缩池、平衡池、脱水工艺和场地布置的设计要点进行总结。 相似文献
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Faulwetter JL Burr MD Cunningham AB Stewart FM Camper AK Stein OR 《Water science and technology》2011,64(10):2089-2095
Floating islands are a form of treatment wetland characterized by a mat of synthetic matrix at the water surface into which macrophytes can be planted and through which water passes. We evaluated two matrix materials for treating domestic wastewater, recycled plastic and recycled carpet fibers, for chemical oxygen demand (COD) and nitrogen removal. These materials were compared to pea gravel or open water (control). Experiments were conducted in laboratory scale columns fed with synthetic wastewater containing COD, organic and inorganic nitrogen, and mineral salts. Columns were unplanted, naturally inoculated, and operated in batch mode with continuous recirculation and aeration. COD was efficiently removed in all systems examined (>90% removal). Ammonia was efficiently removed by nitrification. Removal of total dissolved N was ~50% by day 28, by which time most remaining nitrogen was present as NO(3)-N. Complete removal of NO(3)-N by denitrification was accomplished by dosing columns with molasses. Microbial communities of interest were visualized with denaturing gradient gel electrophoresis (DGGE) by targeting specific functional genes. Shifts in the denitrifying community were observed post-molasses addition, when nitrate levels decreased. The conditioning time for reliable nitrification was determined to be approximately three months. These results suggest that floating treatment wetlands are a viable alternative for domestic wastewater treatment. 相似文献
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位于昆明市下游的滇池,因受市区排放的生活污水、工业废水以及当地污水的影响,水污染问题十分突出,急需治理。污水灌溉与污水处理相结合的土地系统是一种可供选择的技术措施。本文阐述了将该系统用于公厕污水处理的工程构造型式与运行管理方式,建立了示范应用工程,开展了污染物去除效果研究和效益分析。结果表明,采用污水灌溉与污水土地处理系统处理公厕污水,处理后回用于厕所冲洗,可获得良好的污水处理效果,并可节约宝贵的淡水资源。该技术在实际应用中具有经济可行性。 相似文献