摘要
餐厨垃圾经过厌氧发酵后脱水产生的沼液,成分复杂,水质波动大,有机物和氨氮浓度高,含杂含油量大,处理难度大。以国内某餐厨垃圾综合处理厂餐厨沼液处理为例,详细分析餐厨沼液水质特性,对多种污染物去除遵循"分步解决,先易后难"的原则,采用预处理(隔油沉淀+气浮+膜细格栅)+两级A/O+超滤(UF)+芬顿(Fenton)高级氧化+曝气生物滤池(BAF)组合工艺处理餐厨沼液,确保出水COD、BOD_(5)、氨氮、TN、TP、SS和动植物油等指标满足当地污水处理厂接管标准。该组合工艺具有出水水质稳定、投资少、占地省等优点,并且没有传统膜法产生的浓缩液问题,可为同类项目的建设提供参考。
The biogas slurry produced by dehydration of food waste after anaerobic fermentation has complex pollutant composition,great fluctuations in water quality,high concentration of organic matter and ammonia nitrogen,large amount of impurities and oil content,which is difficult to treat.Taking the biogas slurry treatment of a domestic food waste comprehensive treatment plant as an example,the water quality characteristics of food waste biogas slurry is elaborated.Following the principle of"stepby-step solution,easy first and then hard"to remove multiple pollutants,the combined process of pretreatment(oil separation sedimentation,air floatation,and fine membrane screen),two-stage A/O,UF,Fenton advanced oxidation,and BAF is adopted to treat the food waste biogas slurry,thus ensuring the indexes of COD,BOD_(5),ammonia nitrogen,TN,TP,SS and animal and vegetable oils meet the discharged standards of local sewage treatment plant.The combined process has the advantages of stable effluent water quality,less investment,less land occupation,and no concentrated liquid problem generated by the traditional membrane method,which could provide reference for the construction of similar projects.
作者
宋欣欣
闵海华
丁西明
SONG Xin-xin;MIN Hai-hua;DING Xi-ming(Tianjin Municipal Engineering Design&Research Institute Co.Ltd.,Tianjin 300392,China;North China Municipal Engineering Design&Research Institute Co.Ltd.,Tianjin 300074,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2021年第8期143-148,共6页
China Water & Wastewater
基金
天津市科技计划项目(19ZXSZSN00080)。
作者简介
宋欣欣(1983-),女,河北石家庄人,硕士,高级工程师,主要从事污水处理研究和工程设计工作。E-mail:songxx_0728@163.com。
