【作者】 关分派；

【导师】 汪晓军； 翟阳；

【作者基本信息】 华南理工大学 ， 环境工程， 2010， 硕士

【摘要】 2008年6月25日,国家环保部批准了《制浆造纸工业水污染物排放标准》（GB3544-2008）。新标准比原标准更加严格,同时增加了氮、磷、AOX、色度等指标。而对于现有废纸制浆与造纸企业,废水排放的新标准将从2009年5月1号开始实施。其中变化最大的就是COD_Cr,标准从原来的250 mg/L下降到120mg/L。只采用常规的二级处理工艺,很难达到新的排放要求,因此,寻找一种有效的、可行的深度处理工艺,对于造纸行业的许多企业来说,已经刻不容缓。本文结合广州某造纸集团有限公司的污水处理系统技术改造项目,通过对各种制浆造纸废水深度处理工艺进行可行性与经济性对比分析,并通过试验验证,项目建设,以及生产性运行分析,得出了以下结论:1.制浆造纸废水经过二级生化处理后,废水的可生化性比较差,难于继续用生物处理工艺进行进一步的深度处理,只能考虑化学混凝、高级氧化工艺、或者组合工艺。2.选择合适的絮凝剂,并且加药量达到一定浓度时,混凝化学法能够对经生化处理后的制浆造纸废水的难生物降解COD_Cr与色度有进一步的去除效果,对于实验所用的经生化处理后的制浆造纸废水(pH 7.13,TCOD_Cr 176.5mg/L,SCOD_Cr 157.4 mg/L,SS 38.0 mg/L,BOD5 9.5 mg/L,色度50倍),经处理SCOD_Cr的去除率可达45%以上,色度去除率可达84%以上,吨水处理成本可以控制在1.0元以内。3.采用超效浅层气浮工艺对制浆造纸二级生化处理后的废水进行深度处理,处理成本（含电费）大概0.8元/m3左右,脱色率可达85% ,COD_Cr去除率高达50.0%。在生化系统出水COD_Cr<200mg/L的情况下,可以稳定出水在100mg/L以下,满足最新的排放要求。相对其他深度处理工艺,具有运行成本低,脱色、污染物去除效果好,运行稳定,操作简单等优点。在目前的环保技术水平条件下,可以说是一种比较合适的制浆造纸废水深度处理工艺。更多还原

【Abstract】 The state environmental protection agency authorize The Discharge standard of Water Pollutants for Pulp and Paper Industry （GB3544 -2008） On June 25, 2008. The new standard is more strictly than the original one. Also increased Nitrogen, Phosphorus , AOX and Chroma indicators etc. And to the old Waste paper pulp and Papermaking Enterprises, the new Discharge standard will carry out from 2009, May 1. One the biggest change is COD_Cr,the standard will from the original 250mg/L down to 120mg/L. Only with normal level 2 treatment process, it is difficult to reach new emissions requirements. Therefore, in search of an effective and feasible deep treatment for many enterprises of papermaking industry, it is urgent.Combining with the Guangzhou paper co.,LTD’s sewage treatment system technology reconstruction project, through various depth of pulping and papermaking wastewater treatment process for feasibility and efficiency analysis, and test, project construction, and productive operation analysis, obtained the following conclusions:1. The Pulp & Paper Wastewater after secondary biochemical treatment, biochemical sex is poorer, can be difficult to continue using biological treatment technology for further deep treatment, can consider the chemical coagulation, advanced oxidation process, or combinations of process.2. Choose appropriate flocculants and dosing amount reaches a certain chroma, coagulation chemical method can further remove stubborn biodegradable COD_Cr and chroma of The Pulp & Paper Wastewater. For the experiment USES The Pulp & Paper Wastewater treatment after biochemical treatment (pH 7.13,TCOD_Cr 176.5mg/L,SCOD_Cr 157.4 mg/L,SS 38.0 mg/L,BOD5 9.5 mg/L,chroma 50 times), SCOD_Cr removal can reach more than 45%, chroma removal rate can amount to 84 percent or more. Tons of water treatment costs can be controlled in 1.0 RMB.3. Use the shallow air-floatation for pulp &paper wastewater biochemical treatment after in-depth processing, Processing cost （including electricity） about 0.8 yuan/m3. Determined.the decolored rate can reach 85%, COD_Cr removal rate as high as 50.0%. In the case of biochemical system effluent COD_Cr < 200mg/L, Can be a constant flow in 100mg/L below, and Meet the latest emission requirements. Relative to other deep treatment, with lower cost, decoloring, pollutant removal efficiency, stable operation, simple operation etc. In the current environmental technology level condition, can say it is a more appropriate depth of pulping and papermaking wastewater treatment process.更多还原