共查询到19条相似文献,搜索用时 93 毫秒
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造纸行业是高污染行业,目前我国制浆造纸工业污水排放量约占全国污水排放量的10 ̄12%,居第三位;污水中COD(化学耗氧量)约占全国总排放量的40 ̄45%,高居第一位。针对占造纸污染负荷80%的蒸煮黑液,安徽新宇纸业多年来一直致力于研究其有效的处理与转化技术,并利用造纸制浆黑液和中段水污泥等废物生产高效有机复合肥,取得了显著的经济效益和环境效益,走出了发展循环经济的新路子。 相似文献
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在造纸工艺中,纸机排除的污水约占整个造纸工艺排水的40%左右,妥善处理好这部分污水使之封闭循环使用,对于节省能源减少环境污染有重要意义。纸机排除的污水主要含造纸纤维及造纸工艺中的填加剂,如滑石粉、松香胶粒及硫酸铝筹,由于其有机污染程序并不严重,一般称为纸机白水。纸机白水所携带的纤维,其容重与 相似文献
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DS倒伞型表面曝气机 总被引:2,自引:0,他引:2
《中国环保产业》2004,(12):45-45
由安徽国祯环保节能科技股份有限公司开发、安徽省环保产业协会推荐的DS倒伞型表面曝气机适用于石油、化工、制革、造纸、食品、农药、煤气等行业及城市生活污水的处理。主要技术内容一、基本原理倒伞叶轮旋转过程中,水呈水幕状自叶片边缘甩出,形成水幕,裹进大量空气。同时,由于污水上下循环,不断更新液面,污水大面积吸入空气,空气中的氧气迅速溶入污水中,完成对污水充氧、搅拌和推流三大作用。二、技术关键倒伞叶轮直径最大达4m,属国内首创;叶轮与减速机连接采用浮式轴技术,运行更平稳;整机采用升降平台专利技术,调节更方便。三、工艺流程… 相似文献
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浅谈制浆造纸工业水污染处理技术 总被引:2,自引:0,他引:2
造纸行业是我国水污染的主要行业。本文分析了我国造纸工业水污染及其治理现状,论述了造纸工业水污染控制对策,提出了造纸工业中中段水采用物化十生化处理、废纸脱墨废水处理采用PE膜处理或气浮+好氧处理等工艺方法。 相似文献
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通过造纸尾水灌溉海涂苇田的盆栽实验和苇地田间实验,考察了造纸尾水对芦苇生长及生态环境的影响.监测结果表明,用造纸尾水灌溉苇田,不仅可以提高芦苇的产量和质量,还可以改良土壤,此方法对周围生态环境无负面影响. 相似文献
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文章介绍了新疆油田在稠油污水处理和回用方面的关键技术和成熟经验,采用强酸性树脂软化技术和化学清洗技术实现了稠油污水回用注汽锅炉。六九区污水处理站采用高效水质稳定技术,使处理后的污水达到了GB 8978—1996《污水综合排放标准》的二级标准,稠油污水在处理后符合GB 1576—2008《工业锅炉水质》的要求,大幅度降低了注汽锅炉的运行成本;将60℃以上的稠油污水替代清水回注稀油油藏,热水驱油,改善了驱油效果,同时根据污水温度较高的特点,对注水井井口的保温工艺进行改进,实现了稠油污水热能的综合利用,为油田污水治理和回用提供了借鉴。 相似文献
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Decentralized approaches to wastewater treatment and management: applicability in developing countries 总被引:6,自引:0,他引:6
Providing reliable and affordable wastewater treatment in rural areas is a challenge in many parts of the world, particularly in developing countries. The problems and limitations of the centralized approaches for wastewater treatment are progressively surfacing. Centralized wastewater collection and treatment systems are costly to build and operate, especially in areas with low population densities and dispersed households. Developing countries lack both the funding to construct centralized facilities and the technical expertise to manage and operate them. Alternatively, the decentralized approach for wastewater treatment which employs a combination of onsite and/or cluster systems is gaining more attention. Such an approach allows for flexibility in management, and simple as well as complex technologies are available. The decentralized system is not only a long-term solution for small communities but is more reliable and cost effective. This paper presents a review of the various decentralized approaches to wastewater treatment and management. A discussion as to their applicability in developing countries, primarily in rural areas, and challenges faced is emphasized all through the paper. While there are many impediments and challenges towards wastewater management in developing countries, these can be overcome by suitable planning and policy implementation. Understanding the receiving environment is crucial for technology selection and should be accomplished by conducting a comprehensive site evaluation process. Centralized management of the decentralized wastewater treatment systems is essential to ensure they are inspected and maintained regularly. Management strategies should be site specific accounting for social, cultural, environmental and economic conditions in the target area. 相似文献
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Prediction of construction cost of wastewater treatment facilities could be influential for the economic feasibility of various levels of water pollution control programs. However, construction cost estimation is difficult to precisely evaluate in an uncertain environment and measured quantities are always burdened with different types of cost structures. Therefore, an understanding of the previous development of wastewater treatment plants and of the related construction cost structures of those facilities becomes essential for dealing with an effective regional water pollution control program. But deviations between the observed values and the estimated values are supposed to be due to measurement errors only in the conventional regression models. The inherent uncertainties of the underlying cost structure, where the human estimation is influential, are rarely explored. This paper is designed to recast a well-known problem of construction cost estimation for both domestic and industrial wastewater treatment plants via a comparative framework. Comparisons were made for three technologies of regression analyses, including the conventional least squares regression method, the fuzzy linear regression method, and the newly derived fuzzy goal regression method. The case study, incorporating a complete database with 48 domestic wastewater treatment plants and 29 industrial wastewater treatment plants being collected in Taiwan, implements such a cost estimation procedure in an uncertain environment. Given that the fuzzy structure in regression estimation may account for the inherent human complexity in cost estimation, the fuzzy goal regression method does exhibit more robust results in terms of some criteria. Moderate economy of scale exists in constructing both the domestic and industrial wastewater treatment plants. Findings indicate that the optimal size of a domestic wastewater treatment plant is approximately equivalent to 15,000 m3/day (CMD) and higher in Taiwan. Yet the optimal size of an industrial wastewater treatment plant could fall in between 6000 CMD and 20,000 CMD. 相似文献