摘要
针对分散式餐饮废水纳管超标现状,将厌氧折流板反应器(ABR)用于某西式快餐店餐饮废水常温下的预处理。结果表明,通过厌氧、好氧混合污泥接种及初始条件控制(HRT为24 h、COD容积负荷1.7 kg/(m^3·d)),ABR启动平顺并连续运行243 d。温度和HRT共同影响ABR除碳功能,COD去除负荷、产气量、甲烷的质量分数在HRT为12 h、25℃时达到最大的3.9 kg/(m^3·d)、219 mL/g和37%,同时出水COD、BOD5和SS、动植物油含量等均满足标准CJ 343-2010纳管要求。秋冬季低温或水力冲击会抑制COD的转化与去除,引起隔室中产酸相后移及出水pH下行,丙酸、丁酸、戊酸等挥发性脂肪酸(VFA)出现累积,COD去除率及产气量、效率和甲烷比例均相应降低,这给常温ABR的应用带来不利影响。
Based on the present situation of excessive discharge of decentralized restaurant wastewater,the anaerobic baffle reactor(ABR)was used for washing wastewater pretreatment from a western fast food restaurant under normal temperature.The results showed that,by inoculation of anaerobic/aerobic mixed sludge and controlling of the initial conditions(i.e.,HRT of 24 h,volumetric load of 1.7 kg/(m^3·d)),ABR started smoothly and run for 243 d continuously,HRT and temperature had a synergic effects on COD degradation,and the removal loading rate,gas production and methane mass fraction reached their respective maximum of 3.9 kg/(m^3·d),219 mL/g and 37%at HRT of 12 h and 25℃.The effluent COD,BOD5,SS,animal and vegetable oils could also meet the discharge standards of CJ 343-2010.Low temperature or hydraulic shock in autumn/winter inhibited the conversion and removal of COD,and thereby made acidogenic phase in compartments to move backward with an increasing effluent pH and simultaneous accumulation of propionic acid,butyric acid and valeric acid.It further resulted in the deterioration of operational performances,in terms of COD removal,gas production,CH4 generating efficiency and its volume ratio,and which would adversely affect the application of ABR at normal temperature.
作者
蒋轶锋
李强
任千里
JIANG Yifeng;LI Qiang;REN Qianli(College of Environmen,Zhejiang Unirersily of Teehnolog,Hangshou 310014,China;Golden Arch(China)Co.Ltd.,Shanghai 200233,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2020年第5期111-114,120,共5页
Technology of Water Treatment
关键词
餐饮废水
厌氧折流板反应器
常温
预处理
restaurant wastewater
anaerobic baffle reactor(ABR)
normal temperature
pretreatment
