低温下真空紫外氧化联合ABR处理餐饮废水  

Vacuum Ultraviolet Oxidation in Combination with Anaerobic Baffle Reactor for Restaurant Wastewater Treatment at Low Temperature

作　　者：郑建军[1] 蒋轶锋 敖慧 ZHENG Jian-jun;JIANG Yi-feng;AO Hui(Design and Research Institute of Environment Protection,Zhejiang Gongshang University,Hangzhou 310005,China;College of Environment,Zhejiang University of Technology,Hangzhou 310032,China)

机构地区：[1]浙江工商大学环保设计研究院,浙江杭州310005 [2]浙江工业大学环境学院,浙江杭州310032

出　　处：《中国给水排水》2024年第21期102-108,共7页China Water & Wastewater

摘　　要：含油餐饮废水成分复杂且存在水量波动,造成行业常用的隔油器出水普遍存在超标纳管问题。采用真空紫外氧化-厌氧折流板反应器(VUV-ABR)组合新工艺对某实际废水开展秋冬季低温条件下的联合处理。结果表明,在高能VUV辐照及必要的水力搅拌(内循环流量为4.5 L/min)辅助下,油脂可被快速光解,而对洗涤剂和COD的去除效果较差,15和60 min时对三者的去除率分别为83%、17%、19%和84%、28%、28%。水力搅拌能促进近灯区活性物质的扩散及反应,但空气或氮气曝气气泡对VUV的强烈吸收会严重阻碍光氧化反应的发生。不饱和油脂主要通过直接光解去除,洗涤剂和COD还与光激发氧化有关。同时考察了VUV联合ABR在水力负荷渐变下的处理性能,发现在水温为8~15℃、光照为15 min、厌氧HRT为18 h条件下,其对油脂、COD、BOD5的去除率分别比单独ABR提高了约46%、15%和27%,协同系数分别为2.0、1.3和1.6,出水水质达到《污水排入城镇下水道水质标准》(GB/T 31962—2015)。组合工艺中VUV和ABR各尽所长又相互协作,前者占地小、操作方便,还可消除油脂对厌氧代谢的抑制作用;后者则弥补了VUV氧化和矿化效果差的弱点;VUV对油脂和COD去除的贡献率分别为91%和28%。The composition of oily restaurant wastewater is intricate and the wastewater volume fluctuates significantly,thereby causing the phenomenon that the effluent of the oil separator commonly utilized in catering industry frequently exceeds the discharge standard to municipal sewers.The novel combined process of vacuum ultraviolet oxidation and anaerobic baffle reactor(VUV-ABR)was employed to treat actual restaurant wastewater at the low temperature during autumn and winter.With the assistance of high-energy VUV irradiation and requisite hydraulic agitation(internal cycle flow of 4.5 L/min),the fats could be rapidly photolyzed.However,the removal performance of detergent and COD was unsatisfactory.The removal efficiencies of the three were 83%,17%,and 19%at 15 minutes,and 84%,28%,and 28%at 60 minutes, respectively. The hydraulic agitation facilitated the diffusion and reaction of activesubstances in the vicinity of the lamp area. However, aeration with air or nitrogen severely impeded theoccurrence of photooxidation due to the intense absorption of VUV by gas bubbles. Unsaturated fats werepredominantly eliminated through direct photolysis, and detergents as well as COD were also associatedwith photoexcited oxidation. Simultaneously, the treatment performance of VUV in combination with ABRunder the gradient of hydraulic load was explored. It was discovered that the removal efficiencies of fats,COD, and BOD5 of VUV combined with ABR under the circumstances of 8-15 ℃, 15 minutes of lightexposure, and 18 hours of anaerobic HRT were enhanced by 46%, 15%, and 27% respectively comparedto ABR alone. The synergetic coefficients were 2.0, 1.3, and 1.6 respectively, and the effluent quality metthe limits specified in Wastewater Quality Standards for Discharge to Municipal Sewers (GB/T 31962-2015). In the combined process, VUV and ABR collaborated with each other. The former occupied asmall area, was convenient to operate, and could eliminate the inhibition of fats on anaerobic metabolism.The latter compensated for the defici

关 键 词：餐饮废水 真空紫外 厌氧折流板反应器 低温 纳管排放 

分 类 号：TU992[建筑科学—市政工程]