餐厨垃圾好氧发酵臭气处理工艺设计

Process design of odor treatment for aerobic fermentation of kitchen waste

餐厨垃圾预处理及好氧发酵过程中产生的含有硫化氢、甲硫醇、甲硫醚、氨及其他挥发性有机物(VOCs)等物质的恶臭气体,会对厂区及周边环境产生不良影响。采用“碱吸收塔+化学氧化吸收塔+水吸收塔”工艺处理了该有组织排放臭气,探究了好氧发酵废气的组成、臭气浓度、处理工艺和工艺参数等。工程实践表明,该工艺整体除臭效率>80%,尾气排放满足《恶臭污染物排放标准》(GB14554-93)相应限值,具有适应性强、运行稳定及投资运行费用较低的特点。

The malodorous gases produced during the pretreatment and aerobic fermentation of kitchen waste,including hydrogen sulfide,methyl mercaptan,methyl sulfide,ammonia and other volatile organic compounds(VOCs),will have adverse effects on the plant and surrounding environment.The process of"alkali absorption tower+chemical oxidation absorption tower+water absorption tower"was used to treat the organized emission of odor,and the composition,odor concentration,treatment process and process parameters of aerobic fermentation of kitchen waste gas were investigated.Engineering practice shows that the overall deodorization efficiency of this process is over 80%,and the tail gas emission meets the corresponding limits of the Emission Standard for Malodorous Pollutants(GB14554-93),which had the characteristics of strong adaptability,stable operation and low investment and operation cost.