沼渣水热炭与沼渣热解炭强化餐厨垃圾厌氧消化对比研究  

Comparative Study on Anaerobic Digestion of Food Waste Enhanced by Biogas Residue Hydrochar and Biogas Residue Pyrochar

作　　者：欧阳创 张余镕 邰俊 徐先宝 薛罡[2] 李响[2] OUYANG Chuang;ZHANG Yurong;TAI Jun;XU Xianbao;XUE Gang;LI Xiang(Shanghai Environmental Sanitation Engineering Design Institute Co.Ltd.,Shanghai 200232;College of Environmental Science and Engineering,Donghua University,Shanghai 201620)

机构地区：[1]上海环境卫生工程设计院有限公司,上海200232 [2]东华大学环境科学与工程学院,上海201620

出　　处：《环境卫生工程》2024年第3期47-53,共7页Environmental Sanitation Engineering

基　　金：上海市科委优秀学术/技术带头人计划项目(22XD1431900)。

摘　　要：餐厨垃圾厌氧消化产生大量沼渣,亟需得到妥善处理。采用水热与热解将沼渣分别制备为水热炭与热解炭,并对比研究了其对餐厨垃圾厌氧消化的影响。结果表明:与对照组(23.8 mL/g)相比,水热炭组(投加量1、5、10 g/L)甲烷产量分别为24.0、38.9、34.9 mL/g,分别提高了0.8%、63.4%、46.6%;热解炭组(投加量1、5、10 g/L)甲烷产量分别为29.7、35.7、31.1 mL/g,分别提高了24.8%、50.0%、30.7%。投加水热炭和热解炭促进了有机物溶出,且水解产酸菌包括Fastidiosipila、 W5053、 Propioniciclava、 Actinomyces (放线菌属)、Norank_f__ST-12K33的总相对丰度由73.0%分别提升至84.6%和82.0%。投加水热炭和热解炭后,Methanosaeta(鬃毛甲烷菌属)相对丰度分别高达60.3%和50.6%,Methanobacterium (甲烷杆菌属)相对丰度仅为26.5%和36.9%。沼渣生物炭可以强化餐厨垃圾厌氧消化,随着投加量的增加,甲烷产量先上升后下降,最优投加量为5 g/L,且水热炭效果优于热解炭。Anaerobic digestion(AD)of food waste could result in a large amount of biogas residue generation,which needs to be properly disposed.Biogas residue was prepared into hydrochar and pyrochar by hydrothermal and pyrolysis reaction,respectively.The effects of hydrochar and pyrochar on AD of food waste were compared.The results showed that compared with the control group(23.8 mL/g),the methane production of hydrochar group(dosage of 1,5 and 10 g/L)was 24.0,38.9 and 34.9 mL/g,which increased by 0.8%,63.4%and 46.6%,respectively.The methane yield of pyrochar group(dosage of 1,5 and 10 g/L)was 29.7,35.7 and 31.1 mL/g,which increased by 24.8%,50.0%and 30.7%,respectively.Hydrochar and pyrochar amendment promoted the solubilization of organic matter.While the total relative abundance of hydrolytic acid-producing bacteria of Fastidiosipila,W5053,Propioniciclava,Actinomyces,and Norank_f__ST-12K33 increased from 73.0%to 84.6%and 82.0%,respectively.After adding hydrochar and pyrochar,the relative abundance of Methanosaeta was as high as 60.3%and 50.6%respectively,while the relative abundance of Methanobacterium was only 26.5%and 36.9%.Biochar from biogas residue could strengthen the AD of food waste,with the increase of dosage,methane production first increased and then decreased,the optimal dosage was 5 g/L.And the hydrochar performed better than pyrochar.

关 键 词：沼渣 水热炭 热解炭 餐厨垃圾 厌氧消化 

分 类 号：X799.3[环境科学与工程—环境工程]