废纸造纸厂污水处理技术与研究

发布时间：2018-03-05 20:24

本文选题：废纸造纸　切入点：厌氧处理　出处：《苏州科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：造纸行业是水污染大户。以废纸为原料造纸在造纸原料占的比重为78.3%。处理好废纸造纸废水是社会关注的热点之一。随着废纸造纸行业节水技术的不断进步,废纸造纸废水的浓度不断提高,利用厌氧技术回收废纸造纸废水中的能源变成了可能。本文通过实验室小试及工程应用,研究了废纸造纸废水通过厌氧+好氧处理回用的可行性,同时对处理后的水回用情况、污泥回用和厌氧沼气利用情况进行研究。本文取得了以下研究成果:1、实验室小试研究过程中,采用中温(36～38℃)厌氧条件下,HRT为24h,容积负荷5kg·COD/(m3·d)条件下,COD去除率为75%左右;2、实验室研究过程中,采用SBR反应器,容积负荷0.5kg·COD/(m3·d)条件下,COD去除率为70%左右;3、在实际工程运行中,采用"中温厌氧—好氧"组合工艺,厌氧负荷3～4 kg·COD/(m3·d)条件下,COD 去除率在 80%左右。好氧负荷 0.5kg·COD/(m3 d),COD去除率在80%左右;4、通过废水处理,车间废水回用率达到90%,外排水量2.2t/t纸。好氧剩余污泥全部回收利用。5、厌氧系统产生的沼气用沼气锅炉每天可产蒸汽30t,供车间使用。6、沼气利用和好氧污泥回收造纸,每天可为公司创造效益5000元,扣除直接运行费用每年可以给公司带来66万元利润。该工程为废纸造纸废水处理及能源回收利用提供了切实可行的真实案例,可以作为示范工程推广,也为其他行业废水处理及能源利用提供参考和借鉴。
[Abstract]:The paper industry is a major water polluter. The proportion of paper made up of waste paper as raw material is 78.3%. The treatment of waste paper wastewater is one of the hot spots of the society. With the development of water-saving technology in waste paper industry, With the increasing concentration of waste paper and paper wastewater, it is possible to use anaerobic technology to recover the energy from waste paper and papermaking wastewater. The feasibility of anaerobic aerobic treatment and reuse of waste paper and paper wastewater was studied. Sludge reuse and anaerobic biogas utilization were studied. The removal rate of COD/(m3 under anaerobic condition is 24 h and the volumetric load is 5 kg 路COD/(m3 路d). In laboratory research, the removal rate of SBR is about 70% m3 under the condition of SBR reactor and volume load 0.5 kg 路COD/(m3 路d). Under the condition of anaerobic load of 3 kg 路COD/(m3 路d and aerobic load of 0.5 kg 路COD/(m3 路d, the removal rate of COD/(m3 was about 80% and 80% ~ 4 respectively. The recycling rate of waste water in the workshop reached 90 t / t. Aerobic excess sludge was all recovered and utilized .5.The biogas boiler produced by the anaerobic system can produce 30 tons of steam per day for use in the workshop, and biogas utilization and aerobic sludge recovery and papermaking. It can create 5, 000 yuan per day for the company, deducting the direct operating cost can bring 660,000 yuan of profit to the company every year. This project provides a practical case for the waste paper paper wastewater treatment and energy recycling. It can be used as a demonstration project and can also be used for reference in other industries for wastewater treatment and energy utilization.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X793

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