电活性铝凝剂EAF对炼油废水的絮凝作用

采用电化学方法制取电活性铝凝剂ＥＡＦ．对照测定了３种传统的含铝絮凝剂和ＥＡＦ对模拟和实际含油废水的絮凝净化作用．结果表明，６０℃温度下，ｐＨ＝６～７，ＥＡＦ的用量为１０～３０ｍｇ／Ｌ时，油与ＣＯＤｃｒ去除率分别在９０％和８０％以上．简单讨论了ＥＡＦ的絮凝作用机理．     

浅谈炼油企业的水资源利用

水资源短缺和水资源不能得到有效利用的问题严重制约我国经济的可持续发展，并将引起生态环境退化、人居环境恶化、争水矛盾日益突出等社会和环境问题。针对炼油企业水资源利用的现状和存在的问题进行了分析，结合当前企业的实际情况，在节水和废水资源再利用等方面做了初步的探讨。     

城市污水污泥堆肥化技术的研究进展

本文介绍了堆肥化技术发展的历史，以及国内外污泥堆肥化技术的研究进展，并介绍了国内的生产实例，可供大家初步了解污泥堆肥化技术。     

秦皇岛市开发区生活污水利用可行性分析

本文通过对秦皇岛经济技术开发区居民小区生活污水进行处理并回用的可行性分析,得出城市生活污水经过适当处理后,完全可以再利用,从而达到节约水资源的目的,实现经济效益与环境效益的统一。     

Environmental assessment of supercritical water oxidation of sewage sludge

Environmental aspects of using supercritical water oxidation (SCWO) to treat sewage sludge were studied using a life cycle assessment (LCA) methodology. The system studied is the first commercial scale SCWO plant for sewage sludge in the world, treating sludge from the municipal wastewater treatment facility in Harlingen, TX, USA. The environmental impacts were evaluated using three specific environmental attributes: global warming potential (GWP), photo-oxidant creation potential (POCP) and resource depletion; as well as two single point indicators: EPS2000 and EcoIndicator99. The LCA results show that for the described process, gas-fired preheating of the sludge is the major contributor to environmental impacts, and emissions from generating electricity for pumping and for oxygen production are also important. Overall, SCWO processing of undigested sewage sludge is an environmentally attractive technology, particularly when heat is recovered from the process. Energy-conserving measures and recovery of excess oxygen from the SCWO process should be considered for improving the sustainability potential.     

BMP tests of source selected OFMSW to evaluate anaerobic codigestion with sewage sludge

The aim of this study is to characterize different types of source selected organic fraction of municipal solid waste (SS-OFMSW) in order to optimize the upgrade of a sewage sludge anaerobic digestion unit by codigestion. Various SS-OFMSW samples were collected from canteens, supermarkets, restaurants, households, fruit–vegetable markets and bakery shops. The substrates characterization was carried out getting traditional chemical–physical parameters, performing elemental analysis and measuring fundamental anaerobic digestion macromolecular compounds such as carbohydrates, proteins, lipids and volatile fatty acids. Biochemical methane potential (BMP) tests were conducted at mesophilic temperature both on single substrates and in codigestion regime with different substrates mixing ratios. The maximum methane yield was observed for restaurant (675 NmlCH₄/gVS) and canteens organic wastes (571 and 645 NmlCH₄/gVS). The best codigestion BMP test has highlighted an increase of 47% in methane production respect sewage sludge digestion.     

美国市政污水处理排放标准制定对中国的启示

在概述美国市政污水处理排放标准制度体系的基础上,介绍了其制定基于技术的排放限值和基于水质的排放限值的方法,阐述了其制定的科学性,并指出了中国市政污水处理排放标准中存在的相应问题。最后,根据美国制定排放标准限值的经验,对我国污水处理排放标准进行了思考,并提出了科学制定排放标准的方法和建议。     

Phosphorus recovery from municipal and fertilizer wastewater: China's potential and perspective

Phosphorus (P) is a limited resource, which can neither be synthesized nor substituted in its essential functions as nutrient. Currently explored and economically feasible global reserves may be depleted within generations. China is the largest phosphate fertilizer producing and consuming country in the world. China''s municipal wastewater contains up to 293,163 Mg year of phosphorus, which equals approximately 5.5% of the chemical fertilizer phosphorus consumed in China. Phosphorus in wastewater can be seen not only as a source of pollution to be reduced, but also as a limited resource to be recovered. Based upon existing phosphorus-recovery technologies and the current wastewater infrastructure in China, three options for phosphorus recovery from sewage sludge, sludge ash and the fertilizer industry were analyzed according to the specific conditions in China.     

小型城市污水排放量预测模型研究——以楚雄市为例

针对小城市污水排放量历史数据较少,城市发展变化较大的特点,以楚雄市为例,提出了基于污水排放来源以及生成机理的预测方法。根据历史人口增长趋势以及城镇化率进行城区人口综合预测,运用定额法根据不同行业用水特点预测城市用水量,结合城市污水排放特点对楚雄市近期以及远期城市污水排放量进行科学合理的预测,并对预测结果进行了分析,可为城市发展规划提供决策参考。     

城市新区污水收集系统的建设和管理

城市新区开发的过程中,污水收集系统往往是容易被忽视的部分,因此会带来新的水体污染问题。本文针对城市新区开发中污水收集系统容易出现的问题,从规划、建设和管理三方面进行了研究和分析,并对城市新区污水收集系统建设和管理提出了建议。