【作者】 刘旭；

【导师】 崔康平；

【作者基本信息】 合肥工业大学 ， 环境工程， 2015， 硕士

【摘要】 以江苏省某工业园区污水处理厂出水为研究对象,针对工业园区废水成分复杂、冲击负荷大、可生化性差等特点造成出水难达到一级A标准的问题,依托北京市自然科学基金与北京市科学技术研究院联合资助项目(L140011),国家水体污染控制与治理科技重大专项(2012ZX07205-002),设计开发了复合式高级氧化设备,采用复合式高级氧化设备—曝气生物滤池联用对其进行深度处理。为解决工业园区综合污水厂出水难达标问题提供技术支持。对臭氧氧化(03)、臭氧紫外高级氧化(03/UV)、臭氧双氧水高级氧化(03/H202)等不同臭氧高级氧化工艺采用相同小试设备进行了对比筛选,评价了对污染物去除规律、可生化性提高程度等指标。实验结果表明在去除污染物和可生化性提高方面,氧化效果排序为O3/UV>O3/H2O2>O3。使用03/UV复合工艺处理水质为CODCr90mg/L、色度60倍的园区废水,在臭氧投加量为20mg/L、接触时间为4mm、紫外灯40W的条件下,出水水质和可生化性有明显改善,UV254、色度和CODCr的去除率分别为39.8%、33.3%和12.2%。研究了复合式高级氧化设备(Co-AOP)的设计要点,设计制造了复合式高级氧化设备中试设备。臭氧发生单元采用放电式臭氧发生器,臭氧投加单元选用静态混合器,臭氧反应单元选用横向管式反应器、沿程补充臭氧、内置紫外灯灯管,最后设置汽水分离器和臭氧破坏器,采用316L不锈钢制造。中试设备由3个DN 100×1600mm反应单体串联,处理量12.96t/d；示范工程设备由6个DN260×1750mm反应单体串联,处理量300t/d。在该工业园区污水厂建立中试基地,研究了复合式高级氧化设备—曝气生物滤池(BAF)联用处理实际废水的效果。长期中试设备运行结果表明,进水CODCr平均浓度为82mg/L时,单独高级氧化单元去除率为18.3%,两反应器联用时,复合式高级氧化设备的处理提高了废水的可生化性,联合处理总去除率为47.6%,出水CODCr浓度43mg/L,出水水质符合一级A标准。在中试试验的基础上,在该污水厂搭建并长期运行了复合式高级氧化设备—曝气生物滤池示范工程。通过长期检测结果及经济技术分析,复合式高级氧化设备示范工程运行费用为0.47元／吨,证明复合式高级氧化设备不仅在技术上可行,经济上也符合实际需求。更多还原

【Abstract】 Secondary effluent of wastewater from industrial park in Jiangsu was taken as treatment objective. The wastewater of industrial park is difficult to be treated to meet the emission standards due to its characteristics of large shock load, complex water components, and poor biodegradability. A new combined advanced oxidation process reactor (Co-AOP) was designed, and the Co-AOP and Biological Aerated Filter was established for the advanced wastewater treatment of industrial park for aiming at water reuse, which provide the technical support to solve the problem.Different AOPs were compared, including ozonation (O3), ozone and ultraviolet combined AOPs (O3/UV),ozone and hydrogen peroxide coupling AOPs (O3/H2O2) by a bench-scale device, in mineralization degree of effluents and improvement of biodegradability. The results showed that the order of three AOPs was 03/UV> O3/H2O2>O3. When O3/UV was employed in advanced wastewater treatment of industrial park, the analysis results indicated that the removals of UV254, Color and CODCrwere 39.8%,33.3% and 12.2%.Principles of reactor design were researched, and the Co-AOP for the pilot test and one for demonstration engineering was designed and manufactured. The Co-AOP consists of 4 parts:Ozone generator unit, ozone aeration unit, ozone reactor unit and ozone destruct unit, which were manufactured with a 100g/h discharging ozone generator and air oxygen generator, a static mixer for aeration and 316L steel. The pilot reactor consists of three series same units, which is DN100×1600mm, and the disposal throughput is 12.96t/d; the reactor for demonstration engineering consists of six units, which is DN260x 1750mm, and the disposal throughput is 300t/d.Pilot test of Co-AOP&BAF was conducted in the industrial park in Jiangsu. Long-term running data showed that the CODCr removal of AOPs unit is 18.3%. With O3/UV pretreatment, which improved the biodegradability of wastewater. Though the Co-AOP&BAF treatment, CODCr is reduced from 82mg/L to 43mg/L and the CODCr removal increased to 47.6%, which met the A grade of first level in the national discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002).Demonstrate project of Co-AOP&BAF was conducted in the industrial park Though long-term running data and economic technical analysis, the treatment cost for Co-AOP was 0.47 yuan/t, proving the reactor is not only technically feasible, but also economically with actual demand.更多还原