【作者】 赵敏娟；

【导师】 冯贵颖；

【作者基本信息】 西北农林科技大学 ， 环境工程， 2011， 硕士

【摘要】 造纸工业投资大、能耗高,并且对环境污染严重。与国际同行业相比,我国造纸行业用水消耗量大,水资源利用率低,节水水平低。由于造纸业自身的特点给生态环境造成了巨大压力,在水资源日益匮乏、水污染严重的情况下,国家强制要求造纸企业采取措施,因地制宜,减少水资源的消耗,提高水资源利用率,降低废水污染排放,因此造纸行业工业废水回用工艺在造纸行业中的应用显得尤为重要。本论文通过对国内外废水循环回用的比较,结合陕西某造纸企业的实际情况分析,设计了工业废水回用及厂区生活污水回用的技术路线,并对此技术路线进行可行性分析和评价。本文的主要内容包括:(1)探讨了造纸行业对于水资源的污染情况,从废纸再生造纸废水的来源、特点和生产工艺方面分析了再生造纸废水的污染的特殊性,并结合国内外的研究分析了造纸行业对于水资源的综合利用,同时着重分析了废纸再生造纸废水循环回用的研究进展,最终对于废纸造纸废水的处理及回用进行了可行性的探讨,同时结合在线环境自动监测系统的研究进展分析了如何实现企业和环保部门的有效监控和信息化管理。(2)对陕西某造纸企业的概况做了概述,并分析了废水处理现状,在查阅大量相关资料的基础上,采用造纸废水厂内处理回用系统,提出符合陕西某造纸企业实际情况的工业废水处理和回用工程技术体系,废纸再生造纸企业废水处理后厂内回用最有可能实现废水封闭回用和零排放,对实现全部废水的零排放具有重要的意义。(3)结合陕西某造纸企业实际情况,提出了废纸造纸废水处理和回用工艺采用混凝+CASS+电渗析的设计方案,并进行了安装调试,通过对废水处理回用生产工艺设备的调试进行了废水处理效果的检验,结果显示该处理工艺能够对废水起到很好的处理效果,达到了废水循环回用的要求,证明该方案是可行的,具有工程推广价值。(4)通过对陕西某造纸企业职工生活用水情况的分析,提出了主体流程为生化+消毒工艺为主的生活污水回用工程体系,收集的生活污水通过格栅进入调节池均化水质水量。均质后的污水进入缺氧池后,污水经过缺氧处理后在后续好氧单元组合后,实现生物反硝化脱氧。通过好氧微生物新陈代谢作用去除水中绝大部分的需氧污染物,并在此处通过膜的截留作用实现泥水分离。生化反应单元产生的剩余污泥在污泥浓缩池处通过重力浓缩作用脱水,降低污泥含水率,减少污泥体积,为污泥进一步机械脱水做准备。最后进入回用水池,设置ClO2发生器,用于消毒。同时采用PLC自动控制。本工程以生活污水对象,处理后的出水符合回用标准。(5)通过查阅大量资料,为陕西某造纸企业提出适合其自身发展需要的在线环境自动监测系统。该在线自动监测系统主要由多路数据处理平台、污水流量在线监测监控系统、水质在线监测监控系统、废污水处理设施监测监控系统组成。(6)分析陕西某造纸企业废水处理和生活污水处理回用及在线监测系统,详细阐述了该水资源优化配给方法所带来的经济效益、环境效益和社会效益,对于整个造纸行业具有重要的借鉴意义。更多还原

【Abstract】 Paper-making industry is one of industries that need large investment make higher energy consumption and have environmental pollution. Compare to other our countries, the amount of water in papermaking industry in China is higher, while the level of saving water is lower. Considered increasingly tense water resources and serious water pollution problems, the country demands a large and medium-sized enterprises to take measures to reduce paper consumption and reducing waste water discharge. Therefore the study on recycling technology of papermaking effluent and life sewage is very important.The papers compared recycling technology of papermaking effluent in China and abroad, analysised the water reusing situation in a papermaking enterprises of Shaanxi. Also the processes of papermaking effluent recycle and life sewage were designed, and the consequence was inspected and evaluated. The central content involves:(1) We studied water pollution of papermaking industry, analysised the pollution of Wastepaper Recycling from the source, features and the production process. By comparing the water use of papermaking enterprises in and abroad, we studied the present development of treatment system for wastepaper recycling and life sewage, and combined the online monitoring system for water pollution.(2) Analysis and assessment were made for current wastewater treatment condition in a paper making group in Shaanxi. New methods to make use of wastewater accord to the reality in Yuhua group are raised. After the treatment of waste paper water, it is possible to achieve zero-discharge in waste papermaking wastewater of transformation, which is important for the whole industry.(3) By analysising the current condition of in a recycled paper mill in Shaanxi, a treatment system was studied to treat their waste water by using anaerobic-aerobic sludge system, satisfactory results indicated that the discharge effluent is in compliance with the regulation of GB3544—2008.(4) Analysis were made for water use of life by the workers in a paper making group, the information on the basis of the biological processes for the life in the back of the system is available. In the project, life sewage was used for water reuse, and the treated water was mainly used to flush the flowers, wash toilets and cars. The distillation process was sublimation and disinfection.In this papermaking enterprises, the practice of industrial waste water level back to life in the engineering was inspected and educated.(5) By reviewing a number of information for papermaking enterprises proposed for its own development needs of the online environment monitoring system. to the online the monitoring system of the data processing platforms, the traffic in the monitoring system, water quality in monitoring system, the sewage treatment facilities of monitoring system.(6) Economic benefit, environmental benefit and social benefit after the operation of water resource optimized allocation are summarized.更多还原