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介绍了SBR式流化床船用生活污水处理设备的组成结构,对该设备进行了启动试验和污水处理效果试验,结果表明该设备具有启动方便、反应时间短的特点。当处理周期为2h时,处理设备的出水水质完全满足《船用生活污水处理系统技术条件》(GB10833-89)的要求。 相似文献
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介绍了一种改进型埋地式生活污水的净化装置,分析了其优点、工作原理及其基本结构。运行情况表明,出水水质良好,满足排放标准,特别适用于城市污水集中处理设施不完善的小区和公共建筑的生活污水处理中的使用。 相似文献
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造纸中段废水与生活污水合并深度处理工艺 总被引:2,自引:0,他引:2
采用水解酸化+CAST+混凝+复合滤池与水解酸化+接触氧化+混凝+复合滤池2种组合工艺对造纸中段废水与生活污水进行合并处理对照试验.结果表明,两种工艺都是切实可行的,二级出水均可达到《污水综合排放标准》(GB8978-1996)二级标准,深度处理出水可达中水水质要求.其中以水解酸化+CAST+混凝+复合滤池组合工艺效果最好. 相似文献
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两段接触氧化法处理生活污水的实验研究 总被引:2,自引:0,他引:2
刘忠伟 《环境污染治理技术与设备》2006,7(8):107-110
接触氧化法具有处理效率高,耐冲击负荷,活污水的模拟实验基础上,探讨了水力停留时间、供气量力停留时间均为1h时,COD、BOD,和SS的平均去除率氧化法对氨氮有较好的去除效果。工程实例运行情况表镇生活小区的生活污水处理。水水质好,占地面积小等特点。本文在两段接触氧化法处理生处理效果的影响。实验结果表明:在总气水比为5:1,两段的水别达到94.5%、93.2%和91.7%。与活性污泥法相比,两段接触,出水水质符合国家污水排放标准,该法也适用于厂矿企业及城镇生活小区的生活污水处理。 相似文献
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采用水解酸化 CAST 混凝 复合滤池与水解酸化 接触氧化 混凝 复合滤池2种组合工艺对造纸中段废水与生活污水进行合并处理对照试验.结果表明,两种工艺都是切实可行的,二级出水均可达到<污水综合排放标准>(GB8978-1996)二级标准,深度处理出水可达中水水质要求.其中以水解酸化 CAST 混凝 复合滤池组合工艺效果最好. 相似文献
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介绍了农村小城镇分散型的生活污水处理经验,即采用隔油沉淀、水解酸化、接触氧化法的处理工艺;污水处理设施采用埋地式土壤覆盖型;最终废水出水的各项水质指标均达到《城镇污水处理厂污染物排放标准》(GB18918—2002)中的一级B类标准。 相似文献
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试验研究了EM对生活污水的净化效果,分析了不同EM投放量以及EM对不同性质的生活污水净化效率及选择性,并对其经济效益进行了估算. 相似文献
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Felix L. Yerzley Ph.D. P.E. 《Journal of the Air & Waste Management Association (1995)》2013,63(1):19-23
A first-order differential equation describes the dynamic response of many continuous air sampling instruments: Ct = Ci + p(dCi/dt), where Ct is true concentration, Ci is indicated concentration, p is the time constant, and t is time. The time constant, lag time, delay time, and response time are all functions of the volume and flow through the sensor reservoir. All of them can be expressed by the same general equation: t = k3V/Q, where t is the selected time variable, k3 is a constant appropriate to the particular system and selected time variable, V is sensor reservoir volume, and Q is the flow rate through the reservoir. The time constant is the time a sampler takes to indicate 63.2 percent of its final response. Select time constants equal to about half of the shortest desired averaging time. Solve the second equation for the reagent flow to give the desired time constant. Selection of such a time constant eliminates spurious “noise” produced by a fast-responding system. It also provides values within 5 percent of true for atmospheres that change markedly between successive intervals. If a slow-responding system must be used, use the first equation to increase apparent response time. A digital computer can be programmed to automatically correct all measured values. Similarly, analog circuitry can be installed in an air sampling instrument to increase or decrease response time. The analog circuitry to increase response time will continuously solve and plot the first equation. 相似文献
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K. Ootsuka N. Arashi Y. Hishinuma S. Matsuda F. Nakajima M. Mukai 《Journal of the Air & Waste Management Association (1995)》2013,63(10):1053-1056
The body of information presented in this paper is directed to those individuals concerned with the catalytic NOx removal reactor for a dirty (containing dust) flue gas. In the case of treating a dirty flue gas, the concentration of dust is the most important factor. While the dirty gas passes through the catalytic reactor, dust particles deposit and plug up the catalyst causing the reactor pressure loss to rise. As a result, the NOx reduction efficiency decreases more and more, and continuous operation becomes impossible. A new type of NOx removal reactor for dirty flue gas, the intermittent moving bed reactor, has been developed. The following characteristics have been evaluated: (1) method of calculating reactor pressure loss caused by dust particles, (2) static pressure distribution across the catalyst bed in the reactor, (3) method of evaluating uniform movement of catalyst and (4) reentrainment pattern of dust by catalyst movement. After carrying out various successful pilot plant tests, the information needed for construction and operation of a commercial plant has been developed. 相似文献
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C. F. Rogers J. G. Watson Jr. C. V. Mathai 《Journal of the Air & Waste Management Association (1995)》2013,63(12):1569-1576
Two versions of a size-classifying isokinetic sequential aerosol sampler (SCISAS) have been designed, built, tested, and deployed in a field program in the southwestern United States. The SCISAS units can operate at unattended sites, exposing four or more filter types simultaneously, in two size ranges, for six sampling time Intervals. Design considerations included theoretical estimates of aerosol particle losses in the 0-15 μm size range. SCISAS prototypes have been tested to evaluate their sampling efficiency as a function of flow rate, the sensitivity of the sampling efficiency to isokinetic matching within the SCISAS sampling stack, the equivalency of their sampling ports, and their passive deposition characteristics. The prototypes were also compared to several other types of aerosol filtration samplers already in common use. These tests show that particle loss mechanisms within the SCISAS usually cause no more than 5 percent losses, and that the SCISAS units agree, within one to two measurement uncertainty intervals, with other types of aerosol samplers. 相似文献
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城市污水生物脱磷除氮工艺的新进展 总被引:3,自引:0,他引:3
阐述了生物除磷和反硝化脱氮的机理,由此引出脱氮除磷在基质竞争和泥龄方面的矛盾,提出了解决该矛盾的两种可行方案:针对方案,着重介绍了目前脱氮除磷工艺的新进展。 相似文献
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对以工业废水处理为主的工业污水处理厂和接管企业的环保管理提出了建议,有利于工业污水处理厂的健康发展,促进环境保护。 相似文献
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Sequential UV-biological degradation of chlorophenols 总被引:2,自引:0,他引:2
The sequential UV-biological degradation of a mixture of 4-chlorophenol (CP), 2,4-dichlorophenol (DCP), 2,4,6-trichlorophenol (TCP), and pentachlorophenol (PCP) was first tested with each pollutant supplied at an initial concentration of 50 mg l(-1). Under these conditions, the chlorophenols were photodegraded in the following order of removal rate: PCP>TCP>DCP>CP with only CP and DCP remaining after 40 h of irradiation. The remaining CP (41 mg l(-1)) and DCP (13 mg l(-1)) were then completely removed by biological treatment with an activated sludge mixed culture. Biodegradation did not occur in similar tests conducted with a non-irradiated mixture due to the high microbial toxicity of the solution. UV treatment lead to a significant reduction of the phytotoxicity to Lipedium sativum but no further reduction of phytotoxicity was observed after biological treatment. Evidence was found that the pollutants were partially photodegraded into toxic and non-biodegradable products. When the pollutants were tested individually (initial concentration of 50 mg l(-1)), PCP, TCP, DCP, 4-CP were photodegraded according to first order kinetic model (r2>99) with half-lives of 2.2, 3.3, 5.7, and 54 h, respectively. The photoproducts were subsequently biodegraded. This study illustrates the potential of UV as pre-treatment for biological treatment in order to remove toxicity and enhance the biodegradability of organic contaminants. However, it also shows that UV treatment must be carefully optimized to avoid the formation of toxic and/or recalcitrant photoproducts and results from studies conducted on single contaminants cannot be extrapolated to mixtures. 相似文献
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UV/TiO2/H2O2, UV/TiO2 and UV/H2O2 were compared as pre-treatment processes for the detoxification of mixtures of 4-chlorophenol (4CP), 2,4-dichlorophenol (DCP), 2,4,6-trichlorophenol (TCP) and pentachlorophenol (PCP) prior to their biological treatment. When each chlorophenol was initially supplied at 50 mg l−1, UV/TiO2/H2O2 treatment supported the highest pollutant removal, COD removal, and dechlorination efficiencies followed by UV/TiO2 and UV/H2O2. The remaining toxicity to Lipedium sativum was similar after all pre-treatments. Chlorophenol photodegradation was always well described by a first order model kinetic (r2 > 0.94) and the shortest 4CP, DCP, TCP and PCP half-lives of 8.7, 7.1, 4.5 and 3.3 h, respectively, were achieved during UV/TiO2/H2O2 treatment. No pollutant removal was observed in the controls conducted with H2O2 or TiO2 only. Inoculation of all the photochemically pre-treated mixtures with activated sludge microflora was followed by complete removal of the remaining pollutants. Combined UV/TiO2/H2O2-biological supported the highest detoxification, dechlorination (99%) and COD removal (88%) efficiencies. Similar results were achieved when each chlorophenol was supplied at 100 mg l−1. COD and Cl mass balances indicated UV, UV/H2O2, and UV/TiO2 treatments lead to the formation of recalcitrant photoproducts, some of which were chlorinated. 相似文献
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由于实际进水水质与设计值有偏差,造成采用改良氧化沟工艺的邯郸市西污水处理厂的运行管理困难且费用较高。针对该厂的实际运行情况,探讨了曝气系统的DO、MLSS、泥龄等运行参数的控制问题,并对各参数进行分析、优化调整,最终使该工艺具有较好的脱氮除磷效果。 相似文献
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通过分析我国污水回用的潜力、回用的途径、以及经济和环境效益,介绍了污水回用的一些新技术。根据我国目前污水回用的实际情况,阐述了实现污水回用存在和需要解决的问题。 相似文献