低温下生物增效技术对去除氨氮效果的改善

在冬季水温低的情况下,为改善对氨氮的去除效果而实施了生物增效试验,连续30d向某污水处理厂的曝气池投加硝化菌,研究了投加菌剂后对氨氮的去除效果.投加菌剂10 d后,在水温为12.4 ～ 15.2℃时,二沉池出水氨氮浓度＜15 mg/L,对氨氮的去除率由68.6％提高至84.7％,处理水量由6.2×104 m3/d提升至7.5×104 m3/d.菌剂投加期结束后的30 d内,在维持高处理水量的前提下,出水氨氮＜7 mg/L,去除率＞91％,处理水量超过设计水量约25％.同时,该技术的费用较低,直接菌剂成本仅为0.067元/m3.     

新型组合工艺在农村生活污水处理示范工程中的应用

介绍了新型组合工艺处理农村生活污水的关键技术及相关参数。运行结果表明,新型组合工艺处理农村生活污水运行稳定,效果良好,出水水质可达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。     

城镇污水的综合构成及其分类控制——以福清市城乡污水工程一体化专项规划为例

现行《室外排水设计规范》GB50014-2006(2011年版)中定义"城镇污水"为:综合生活污水、工业废水和入渗地下水,笔者认为应增加"合流制截流的雨水"和"初期雨水"这两部分内容。污水量测算虽为污水工程规划中基础性内容,但污水成分的构成却是制定污水系统方案的决定性因素之一,特别是污水中雨水成分采用何种措施处置,目前规范中并没有提出明确的措施。本文通过福清市城乡污水工程一体化专项规划,结合实际情况,因地制宜的提出了不同区域针对"合流制截流的雨水"和"初期雨水"的相应污染控制方案,为相关研究的进一步深入提供参考和借鉴。     

武汉市老城区污水收集系统改扩建工程设计探讨

通过对武汉市龙王嘴地区污水管网系统全面调查、分析,提出了污水收集系统改扩建的总体设想,进行了项目排水体制的选择,同时还详细介绍了在现状道路下敷设污水管道的设计、施工注意事项,对类似城市的老城区污水收集系统改扩建有一定的借鉴作用。     

论污水处理低碳节能的方向与前景

针对现阶段现污水处理低碳、可持续的方向进行了总结。主要从运行节能、绿色技术和绿色能源三个方面的技术措施进行了阐述,并对国内外发展现状进行了对比分析。结合三个方面的技术措施,对我国污水处理可持续发展提出了建议展望。     

Valuing the environment in developing countries: modelling the impact of distrust in public authorities' ability to deliver public services on the citizens' willingness to pay for improved environmental quality

In this paper, we employ the choice experiment method to estimate citizens' valuation of an intervention that proposes to improve the quality of the wastewater deposited in the Ganges River, India. We interviewed 150 randomly selected citizens of Chandernagore, along the banks of the Ganges River, to elicit their willingness to pay (WTP) for this intervention, measured in terms of higher municipality taxes. The findings reveal that almost all of the citizens value wastewater quality, though majority protested the intervention, and stated that they donot trust the authorities for effective management of funds. These protest responses were controlled for with the nested logit model. The results reveal that the citizens are willing to pay significant amounts for improved wastewater quality. Municipalities could rely to some extent on their citizens' WTP higher taxes but municipalities' performance, trustworthiness, accountability, as well as the citizens' perceptions of these, should be improved.     

城市污水回用深度处理的技术措施与工艺选择

针对目前我国的水资源紧缺状况,分析了城市污水回用的意义以及污水回用后的途径,指出对于常规二级污水处理出水,仍然含有许多污染物,所以要进行深度处理后才能够进行回用,在深度处理时要针对不同需求的用水和含不同污染物的污水采用不同的技术措施进行处理,在处理过程中,处理工艺的选择尤为重要.     

Electrochemical treatment of cotton textile-based dyeing effluent

The electrochemical treatment (ECT) of textile wastewater was carried out in a 1.5 dm³ electrolyte batch reactor using iron electrodes. With the four plate configurations, a current density (CD) of 89.2 A/m² and a pH value of 8.5 were found to be optimal, at which maximum reduction in chemical oxygen demand (COD) and colour achieved were 86% and 79%, respectively. Loss of 0.0666 kg/m³ iron electrode and 18.44 kWh/m³ power consumption was observed during ECT with a maximum COD reduction of 79%. The settling characteristics of electrochemically treated effluents as well as the characteristics of foam and residue were also analysed.     

造气污水净化回用及污泥干化处理工程实例

介绍了某大型合成氨厂造气污水水质特点,采用平流沉降/干化池-一体化净水器及真空抽滤污泥干化工艺对其进行处理。结果表明:净水器单台处理能力大于1 000 m3/h;造气污水进水渠进水SS的质量浓度为164~418 mg/L,p H值为7.41~8.08,温度为38~43℃时,清水池出水浊度为13.26~23.60 mg/L,p H值为7.67~8.44,温度为27~31℃,达到进口温度≤55℃,出口温度≤32℃,浊度合格率100%的要求,出水水质稳定达到循环冷却系统补充水的要求。污泥干化后的含水率达到70%。