{"title":"Enhancement of Thermophilic Digestion of Food Waste (FW) via Trace Element Supplementation","authors":"N. Azbar, K. Arslan, T. Keskin, Duygu Karaalp","doi":"10.15377/2409-983x.2019.06.2","DOIUrl":null,"url":null,"abstract":"In this study, the role of trace element (TE) supplementation and performance characteristics of a thermophilic anaerobic digester fed by food wastes (FW) is investigated in the long run, and a representative operational data set for field application is reported over the whole experimental period. Continuous feeding of food wastes with a dry matter of 5% for 150 days was carried out using a 100 L pilot-scale CSTR type anaerobic digester under thermophilic operation conditions. Hydraulic retention time (HRT) and organic loading rate (OLR) were kept around 28 days and less than 3.0 kg oDM m day, respectively. Volumetric biogas production values were reported to be 0.32 m m day during the period where there is no TE supplementation; on the other hand, biogas production was doubled (0.69 mmday) following TE supplementation. This corresponds to an average unit biogas production of 317 and 443 L kg oDM, during TE supplementation and no TE supplementation periods, respectively. Statistical analysis indicated that Co, As, Se, and Al were the most significant trace elements affecting the digester performance.","PeriodicalId":335890,"journal":{"name":"Journal of Chemical Engineering Research Updates","volume":"87 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical Engineering Research Updates","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.15377/2409-983x.2019.06.2","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, the role of trace element (TE) supplementation and performance characteristics of a thermophilic anaerobic digester fed by food wastes (FW) is investigated in the long run, and a representative operational data set for field application is reported over the whole experimental period. Continuous feeding of food wastes with a dry matter of 5% for 150 days was carried out using a 100 L pilot-scale CSTR type anaerobic digester under thermophilic operation conditions. Hydraulic retention time (HRT) and organic loading rate (OLR) were kept around 28 days and less than 3.0 kg oDM m day, respectively. Volumetric biogas production values were reported to be 0.32 m m day during the period where there is no TE supplementation; on the other hand, biogas production was doubled (0.69 mmday) following TE supplementation. This corresponds to an average unit biogas production of 317 and 443 L kg oDM, during TE supplementation and no TE supplementation periods, respectively. Statistical analysis indicated that Co, As, Se, and Al were the most significant trace elements affecting the digester performance.
本研究长期研究了添加微量元素(TE)的作用和食物垃圾厌氧消化池(FW)的性能特征,并在整个实验期间报告了具有代表性的现场应用运行数据集。采用100 L中试CSTR型厌氧消化池,在嗜热操作条件下,以5%的干物质对餐厨垃圾进行连续饲养150天。水力滞留时间(HRT)保持在28 d左右,有机加载率(OLR)保持在3.0 kg oDM m d以内。据报道,在没有补充TE的情况下,体积沼气产量为0.32立方米/天;另一方面,补充TE后,沼气产量增加了一倍(0.69 mmday)。这相当于在补充TE和不补充TE期间的平均单位沼气产量分别为317和443升千克oDM。统计分析表明,Co、As、Se和Al是影响沼气池性能最显著的微量元素。