典型厨余垃圾组分水热炭化处理的转化特性研究  

Research on Transformation Characteristics of Several Typical Components of Kitchen Waste by Hydrothermal Carbonization Treatment

作　　者：王林林 辛少菲 赵临轩 金宜英[4] 马伟芳[1] 徐康宁[1] WANG Linlin;XIN Shaofei;ZHAO Linxuan;JIN Yiying;MA Weifang;XU Kangning(School of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083;State Grid Dongying Electric Power Company,Dongying Shandong 257091;School of Environmental Science and Engineering,Renmin University of China,Beijing 100872;School of Environment,Tsinghua University,Beijing 100084)

机构地区：[1]北京林业大学环境科学与工程学院,北京100083 [2]国家电网东营供电公司,山东东营257091 [3]中国人民大学环境学院,北京100872 [4]清华大学环境学院,北京100084

出　　处：《环境卫生工程》2022年第5期31-39,共9页Environmental Sanitation Engineering

基　　金：北京市科技计划课题(Z201100008220013)。

摘　　要：随着我国垃圾分类工作的推进,城市厨余垃圾分出量急剧增加,亟需研发适宜性的处理技术。水热炭化是一种有机固废高值化处理技术,但是在厨余垃圾处理中的适用性仍然有待研究。对淀粉类(馒头)、纤维素类(长白菜)和蛋白质类(瘦猪肉) 3种典型厨余垃圾组分以及真实混合厨余垃圾的水热炭化特性进行研究,并分析了3种原料在不同炭化温度、恒温时间和含水率条件下的水热炭产率及产物性质。结果表明,炭化温度和恒温时间是水热炭产率和炭化程度的关键影响因素,而含水率的影响较小。3种厨余原料的水热炭化产物性质有显著差异。淀粉类原料的水热炭产率(41.7%~52.4%)高于纤维素类原料(27.3%~47.5%),两种水热炭都是微球形貌且炭化程度较高;而蛋白质类原料不易产生水热炭(产率仅6.2%~24.0%),无固定形态,且炭化程度较低。真实混合厨余垃圾水热炭产率可达49%,炭化程度较高。淀粉类和纤维素类原料的炭化液为酸性(pH为3.1~4.7),而蛋白质类原料的炭化液为中性或碱性(pH为6.2~9.2),蛋白质类原料是炭化液总有机碳和腐植酸的主要贡献者;真实厨余垃圾水热炭化液为酸性,含有一定的氮磷营养元素和腐植酸等有机物质,为进一步资源化利用提供了可能。With the implementation of MSW classification in China,the amount of kitchen waste had increased greatly. Therefore,it was urgent to develop feasible treatment technology. Hydrothermal carbonization(HTC)is a valueadded treatment of organic waste. However,the feasibility of HTC technology to kitchen waste treatment is still unclear. The Characteristics of HTC of three typical kitchen waste components including starch(steamed bread),cellulose(long cabbage),protein(lean pork)and the real mixed kitchen waste were investigate. The hydrochar yield and the product properties were studied under different carbonization temperatures,constant temperature time and moisture contents. The besults showed that the HTC temperature and the constant temperature time were the key factors determining the hydrochar yield and the carbonization degree,while the effect of the moisture content had little influence. There were significant differences in the properties of hydrothermal carbonization products of the three kinds of kitchen waste materials. The hydrochar yield from the starch raw material(41.7%~52.4%)was higher than that from the cellulose raw material(27.3%~47.5%). The two kinds of hydrochar both had a microsphere morphology and presented a high carbonization degree.However,the protein raw materials were not easy to produce hydrothermal carbon(yield only 6.2%~24.0%),with no fixed form and low carbonization degree. The hydrochar yield of real mixed kitchen waste was 49%,with a high carbonization degree. Thecarbonization fluid from starch and cellulose raw materials was acidic(pH was 3.1~4.7),while that from the protein raw material wasneutral or alkaline(pH was 6.2~9.2). The protein raw material was the main contributor to the total organic carbon and the humic acid of the carbonization fluid. The hydrothermal carbonization fluid obtained from real kitchen waste was acidic and contained certain organic substances such as nitrogen,phosphorus nutrients and humic acid,which provided the possibility for further resource utilization

关 键 词：厨余垃圾 水热炭化 水热炭 炭化液 

分 类 号：X799.3[环境科学与工程—环境工程]