餐厨垃圾三相分离有机固相特性及饲用潜力评价  

Characteristics and feed potential evaluation of organic solid phase in three-phase separation of kitchen waste

作　　者：夏吴疆 刘晓吉 张莹莹 陈天虎[1] 邹雪华[1] 刘海波[1] 孙岩松 王勇群 XIA Wujiang;LIU Xiaoji;ZHANG Yingying;CHEN Tianhu;ZOU Xuehua;LIU Haibo;SUN Yansong;WANG Yongqun(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei Anhui 230009;China Energy Conservation and Environmental Protection Group(CECEP)(Feixi)WTE Co.,Ltd.,Hefei Anhui 231241)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]中节能(肥西)环保能源有限公司,安徽合肥231241

出　　处：《环境污染与防治》2025年第1期36-41,共6页Environmental Pollution & Control

基　　金：国家重点研发计划项目(No.2020YFC1908602、No.2020YFC1908603);合肥市揭榜挂帅项目(No.GJ2022SH12);中国节能环保集团有限公司重大科技创新项目(No.cecep-zdkj-2020-001)。

摘　　要：为改善餐厨垃圾厌氧发酵系统稳定性与产沼气效率,中节能(肥西)环保能源有限公司开发了水力疏解+除杂+高温蒸煮+三相分离集成预处理工艺,分离出的有机液相进入厌氧发酵系统,油脂外售,剩余的有机固相亟需找到合适的资源化途径。对有机固相进行全面分析,结果发现:有机固相含水率平均值为80.74%;干基中烧失量、粗蛋白、粗脂肪、半纤维素、粗纤维、木质素、含盐量(以NaCl计)平均值分别为93.78%、34.11%(质量分数,下同)、19.74%、19.05%、5.26%、8.94%、2.57%,有机元素C、H、O、N、S平均值分别为47.11%、7.190%、27.33%、6.570%、0.530%,C/N为7.17,无机元素K、Ca、Na、Mg平均值分别为0.435%、0.155%、1.181%、0.082%。干基中Cr、As、Cd、Pb、Hg平均值分别为3.49、0.140、0.062、0.451、0.027 mg/kg,低于《饲料卫生标准》(GB 13078—2017)。该有机固相含盐量偏高,C/N偏低,不适合直接用于传统的厌氧发酵与好氧堆肥处理工艺,但其营养价值高、有害重金属低,无生物安全风险,具有高值饲料化应用的潜力。In order to improve the stability of the anaerobic fermentation system of kitchen waste and the efficiency of biogas production,China Energy Conservation and Environmental Protection Group(CECEP)(Feixi)WTE Co.,Ltd.has developed an integrated pretreatment process of hydraulic disintegration+impurity removal+high-temperature cooking+three-phase separation.The separated organic liquid phase enters the anaerobic fermentation system and is sold as oil.The remaining organic solid phase urgently needs to find a suitable resource utilization pathway.Through the comprehensive analysis of the organic solid phase,it was found that the average moisture content of organic solid phase was 80.74%.Average values of loss on ignition,crude protein,crude fat,hemicellulose,crude cellulose,lignin and salt content(calculated as NaCl)in dry basis were 93.78%,34.11%(mass fraction,same below),19.74%,19.05%,5.26%,8.94%and 2.57%,respectively.Average values of organic elements C,H,O,N,and S in dry basis were 47.11%,7.190%,27.33%,6.570%,and 0.530%,with a C/N ratio of 7.17.Average values of inorganic elements K,Ca,Na and Mg in dry basis were 0.435%,0.155%,1.181%,0.082%.Average values of Cr,As,Cd,Pb,and Hg in dry basis were 3.49,0.140,0.062,0.451,and 0.027 mg/kg,respectively,which were lower than the“Hygienical standard for feeds”(GB 13078-2017).The organic solid phase had a high salt content and low C/N ratio,making it unsuitable for direct use in traditional anaerobic fermentation and aerobic composting processes.However,it had high nutritional value,low harmful heavy metals,and no biological safety risks,and had the potential for high-value feed application.

关 键 词：餐厨垃圾 三相分离 有机固相 特性 饲料 

分 类 号：S816[农业科学—饲料科学] X799.3[农业科学—畜牧学]