共查询到19条相似文献,搜索用时 156 毫秒
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近年来,随着我国现代化建设的不断发展、国家对环境保护的日趋关注以及环保资金的大量注入,全国各地陆续兴建了一大批污水处理厂。据中国水网统计,截至2008年5月底,全国建成并运营的污水处理厂有1408座。这些污水处理厂的建成运营,为降低污染、提高城市环境质量、改善当地生态环境,发挥了重要作用。 相似文献
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武汉市南太子湖污水处理厂为了实现污水处理后达标排放,同时提高污水处理厂的现代化管理水平,大幅度降低污水处理厂工作人员的劳动强度,达到科学、安全、可靠生产运行的目的,采用了计算机自动控制系统.根据南太子湖污水处理厂的实际情况,讨论了该自动控制系统的设计思路,尤其对该系统主要工艺部分自动控制策略的设计原理及实现方法进行详细的分析,并通过现场实地调试及系统目前良好的运行状态,证明了所设计方法的正确性及可靠性. 相似文献
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近年来 ,随着我国现代化建设的不断发展 ,全国各地陆续兴建了一批城市污水处理厂。据中国市政协会统计 ,到1998年底 ,已建成的污水处理厂近190家 ,全国城市污水处理率也达到29 9%。这些污水处理厂的建成运行 ,为改善各地生态环境 ,提高城市环境质量 ,减少污染发挥了重要作用。但是 ,城市污水处理厂在运行过程中 ,也不时发生人身伤亡事故。例如 ,1994年北京某污水处理厂 ,1999年天津某污水处理厂 ,均因硫化氢中毒造成了重大人员伤亡 ,给国家财产和人民生命造成了巨大损失。实践证明 ,不论污水处理厂规模大小 ,现代化程度如… 相似文献
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城市污水处理厂工艺方案选择技术经济分析 总被引:1,自引:0,他引:1
城市污水处理厂需要较大的投资和运营费用.在我国目前经济条件比较落后,怎样用最少的钱达到最佳的处理效果非常关键.污水处理厂建设中最重要的就是污水处理工艺的选择.通过工程预算得到不同工艺不同规模的处理方案的总费用,通过曲线拟和得到不同工艺的费用和规模的函数关系式.根据技术经济学原理,将污水治理项目的费用和削减污染物的数量相联系,对项目的费用流和削减污染物负荷流进行贴现计算. 相似文献
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陈建周谐李萍黄伟龚玲 《环境影响评价》2017,(6):79-86
目前,城市污水处理厂设计方式还是依据设计手册选取参数,难以准确预测不同进水负荷和污染物组分条件对出水产生的影响。利用污水处理模型软件对污水处理厂设计文件进行模拟可以快速地验算不同条件对处理效果的影响。利用BioWin模型对重庆市某镇级污水处理厂设计方案进行模拟,结果表明:在设计进水水质及运行条件下,该厂各出水水质均能达到一级B标准,满足设计要求;通过进水特征变化模拟,按照设计文件的变化系数增大进水水量后或降低进水COD浓度时,均会导致出水超标;通过运行特征变化模拟,降低内回流比,在原有设计基础上可减少1台曝气机,既能节能降耗又能保证出水水质达标;对原有设计方案进行优化,在原方案基础上优化方案为减少1台曝气机曝气量,调整内回流比为50%,调整污泥回流比为75%。优化方案模拟结果表明,不论是在平均运行温度还是在不利运行温度下,该优化方案均能使出水各项指标达到一级A标准。 相似文献
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Kathleen B. Aviso Raymond R. Tan Alvin B. Culaba Jose B. Cruz 《Process Safety and Environmental Protection》2010,88(1):31-40
In order to minimize the consumption of resources and the generation of waste, eco-industrial parks (EIPs) have been designed to encourage the establishment of waste exchange networks between the plants contained within them. Considering that the participating plants have their individual fuzzy cost goals and that the park authority has the objective of minimizing total freshwater consumption in the EIP, this problem may be formulated as a bi-level optimization problem, with the park authority as the upper-level decision-maker. A bi-level fuzzy optimization model is developed to explore the effect of charging fees for the purchase of freshwater and the treatment of wastewater in optimizing the water exchange network of plants in an EIP. The effect of subsidizing exchange of streams between plants is also included in the model. Results show that it is not necessary to impose exorbitant fees, nor to completely subsidize costs associated with recycling, in order to induce significant reduction of the consumption of freshwater in the EIP. 相似文献
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印染废水集中处理的污染源分析 总被引:5,自引:0,他引:5
简要介绍了各类印染企业的生产工艺,重点分析了废水的来源及其水质特征,指出印染废水集中处理厂在生产过程中应重视污染源的调查、分析,为其正常生产提供帮助。 相似文献
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提高垃圾焚烧电厂热能利用效率的几个途径 总被引:2,自引:0,他引:2
采用能量分析的方法,从几个侧面对垃圾焚烧发电厂热能利用效率低下的原因进行分析,提出了解决垃圾焚烧发电厂热能利用效率的途径:选择合适的炉型,降低散热损失以提高锅炉效率;对进厂垃圾进行堆酵以沥出其中水分,提高入炉垃圾低位热值;提高锅炉出口蒸汽参数,采用回热循环等措施增加蒸汽的可用能,提高系统发电效率。 相似文献
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Thermal conversion is fundamental in an integrated waste management system due to the capability of reducing mass and volume of waste and recovering energy content from unrecyclable materials. Indeed, power generation from industrial solid wastes (ISW) is a topic of great interest for its appeal in the field of renewable energy production as well as for an increasing public concern related to its emissions. This paper is based on the process engineering and optimization analysis, commissioned to the University Campus-Biomedico of Rome by the MIDA Tecnologie Ambientali S.r.l. enterprise, ended up in the construction of an ISW thermo-conversion plant in Crotone (Southern Italy), where it is nowadays operating. The scientific approach to the process analysis is founded on a novel cascade numerical simulation of each plant section and it has been used initially in the process design step and after to simulate the performances of the industrial plant. In this paper, the plant process scheme is described together with the values of main operating parameters monitored during the experimental test runs. The thermodynamic and kinetic basics of the mathematical model for the simulation of the energy recovery and flue gas treatment sections are presented. Moreover, the simulation results, together with the implemented parameters, are given and compared to the experimental data for 10 specific plant test runs. It was found that the model is capable to predict the process performances in the energy production as well as in the gas treatment sections with high accuracy by knowing a set of measurable input variables. In the paper fundamental plant variables have been considered such as steam temperature, steam flow rate, power generated as well as temperature, flow rate and composition of the resulting flue gas; therefore, the mathematical model can be simply implemented as a reliable and efficient tool for management optimization of this kind of plants. 相似文献
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采用混凝斜管沉淀工艺,处理磨床使用后的冷却水,使之达到循环回用的指标,避免了水资源的浪费,减少了对环境的污染。运行实践说明,该系统的运行费用与节约的水及原料的费用大至相等,维护简单,有利于环境保护。 相似文献