共查询到20条相似文献,搜索用时 140 毫秒
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《再生资源与循环经济》2019,(8)
PCB生产过程中的蚀刻液在使用后会产生大量的铜废水,若直接排放不仅会造成严重的资源浪费,还会带来严重的环境污染。因此,对蚀刻液进行循环再生及铜回收是一项节约成本、降低污染的措施。传统的蚀刻液循环再生及铜回收工艺一般采用双液型酸性蚀刻液,且工艺回收利用效果不足,资源浪费严重。本工艺设计采用单液型酸性蚀刻液作为生产线蚀刻液,利用隔膜电解技术对废蚀刻液进行循环再生及铜回收,通过对生产线中ORP值(氧化还原电位)和铜含量比重进行监控,对不同ORP值废蚀刻液进行电解处理和调配,可直接循环再生回到生产线形成再生液。该项工艺设计中设定蚀刻液的工作ORP值为480~600 mv,铜含量比重为1.25~1.35。通过实验检测提铜处理前的蚀刻液铜含量为55 050 mg/kg,提铜处理后的蚀刻液铜含量为7 551 mg/kg,铜回收率达到86.28%。该工艺不仅有效提高了工作效率和废液循环再生利用,降低环境污染,而且具有重要的理论与应用价值。 相似文献
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磷酸生产废水经絮凝-旋流分离工艺处理后,再回用于生产过程,实现了磷酸生产废水的闭路循环,不仅回收了废水中的磷酸,还了大量工业用水。 相似文献
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小氮肥生产污染与综合防治 总被引:1,自引:0,他引:1
本文根据小氮肥生产的特点,分析了生产过程排放污染物对环境的污染及目前国内氮肥生产污染治理水平,提出了改造供水系统,实行串级循环用水、精选原料、开展综合利用等防治措施,并指出从改造工艺入手是治理氮肥厂污染的有效途径。 相似文献
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住宅小区雨水资源化利用与中水回用是建设节水型城市,实现水资源可持续利用的重要组成部分.住宅小区的雨水资源化利用技术将雨水收集、雨水分散处理、雨水集中利用、雨水渗透等技术进行集成优化,具有处理效果好、雨水利用率高、管理方便的优点。住宅小区中水回用属于封闭式污水再生回用系统,采用膜生物反应器(MBR)技术作为小区中水回用技术,具有占地面积少、工艺流程短、处理效率高等优点。 相似文献
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我国农药工业三废治理方法 总被引:9,自引:0,他引:9
详细介绍了我国农药生产中排放的废水、废气、废渣的常用治理技术,通过改进生产工艺和回收利用减少三废的实例,以及主要品系农药生产废水治理方法选择的思路。 相似文献
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de Faria Busch Pmela Marvila Markssuel T. Girondi Delaqua Geovana Carla Vieira Carlos Maurcio F. 《Journal of Material Cycles and Waste Management》2022,24(2):763-774
Journal of Material Cycles and Waste Management - Glass waste from an industrial wastewater treatment plant (WTP) was studied to recycle the material in ceramic materials. A white kaolinitic clay... 相似文献
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Jiro Kohda Yasuhisa Nakano Akimitsu Kugimiya Yu Takano Takuo Yano 《Journal of Material Cycles and Waste Management》2017,19(3):999-1007
Wastewater is discharged during washing processes in the production of biodiesel fuel (BDF) using alkaline catalysts. It can be recycled as a liquid fertilizer for hydroponics by adding essential components for plant growth. The effects of the liquid fertilizer on plant growth were investigated. Liquid fertilizer containing a smaller amount of the BDF wastewater had a similar effect on plant growth as the standard nutrient solutions. This result reveals that BDF wastewater can be recycled for use as a liquid fertilizer for hydroponics. However, fertilizer with a larger amount of the BDF wastewater showed poor and varied plant growth due to the growth of microorganisms in the contaminated wastewater. Hence, when BDF wastewater becomes contaminated during storage, sterilization is necessary to recycle it as a liquid fertilizer. Moreover, contamination during storage should be avoided for successful recycling. 相似文献
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Munsol Ju Sung-Jin Bae Jae Young Kim Dong-Hoon Lee 《Journal of Material Cycles and Waste Management》2016,18(3):419-426
Source-separated collection system of household food waste has been implemented national wide in South Korea. Food waste recycling rate that means conversion rate to recycle is over 90 % in present. However, over the value of 90 %, we need to enhance the efficiency of food waste recycling process. We analyzed material flow of 24 food waste recycling facilities and calculated solid recovery rate to key-process. We found that 3–13 % of the solids from food waste outflows with foreign materials and 27–33 % of the solids outflow with wastewater. As a result, solid recovery rates are 65.3, 60.9, and 56.3 % in wet feed facility, dry feed facility, and composting facility, respectively. Alternative ways to recovery solid from wastewater or collection tools to exclude plastic bags, salt, and moisture content are required to make food waste recycling more efficient. 相似文献
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