[1]鹿晓菲,许玉琳,马放,等.温度对CSTR-EGSB两段式厌氧反应器的影响[J].中国给水排水,2023,39(1):65-72.
　LUXiao-fei,XUYu-lin,MAFang,et al.Effect of Temperature on CSTR-EGSB Two-stage Anaerobic Reactor[J].China Water & Wastewater,2023,39(1):65-72.
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温度对CSTR-EGSB两段式厌氧反应器的影响

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第39卷 期数: 2023年第1期 页码: 65-72 栏目: 出版日期: 2023-01-01
Title:
Effect of Temperature on CSTR-EGSB Two-stage Anaerobic Reactor
作者:
鹿晓菲1， 许玉琳1， 马放2， 王晨熹1， 李敏1
（1.沈阳建筑大学 市政与环境工程学院，辽宁 沈阳 110168；2.哈尔滨工业大学环境学院 城市水资源与水环境国家重点实验室，黑龙江 哈尔滨 150090）
Author(s):
LU　Xiao-fei1， XU　Yu-lin1， MA　Fang2， WANG　Chen-xi1， LI　Min1
（1. School of Municipal and Environmental Engineering， Shenyang Jianzhu University， Shenyang 110168， China； 2. State Key Laboratory of Urban Water Resource and Environment， School of Environment， Harbin Institute of Technology， Harbin 150090， China）
关键词:
两段式厌氧消化;  CSTR-EGSB;  厌氧反应器;  低温
Keywords:
two-stage anaerobic digestion;  CSTR?EGSB;  anaerobic reactor;  low temperature
摘要:
针对沼气工程（尤其是北方低温地区）产气效能和运行稳定性对温度条件的耐受十分脆弱的问题，采用连续搅拌釜-厌氧膨胀床（CSTR-EGSB）两段式厌氧反应器，以牛粪和水稻秸秆为底物，分别对不同温度条件下的产酸和产甲烷效能进行了评估。结果表明，CSTR产酸反应器中SCOD浓度、pH、总氨氮（TAN）浓度等指标在25~35 ℃范围内随温度变化的差异较大；当温度由35 ℃降至25 ℃时，乙酸占总挥发性脂肪酸（VFAs）的比例由62.9%~70.5%降至46.3%~59.4%。EGSB产甲烷反应器在温度降至15 ℃时，仍有127.33 mL/（L·d）的沼气容积产率、33.3%的甲烷占比和32.3%的TCOD去除率。高通量测序结果表明，Methanomicrobiaceae（甲烷微菌科）可能在低温产甲烷过程中发挥了重要作用。低温下乙酸生成受限、丙酸积累加剧可能是导致沼气工程产甲烷效率较低的原因之一，可深度开发基于Methanomicrobiaceae和Euryarchaeota_unclassified的抗低温型产甲烷菌剂。
Abstract:
Biogas production efficiency and operational stability of biogas project (especially in the low temperature areas in the north) are very sensitive to the temperature conditions. This paper used a two-stage anaerobic reactor consisting of a continuous stirred tank and an expanded granular sludge bed (CSTR-EGSB) to evaluate the acidogenesis and methanogenesis efficiency at different temperatures with cow manure and rice straw as substrates. The SCOD, pH, total ammonia nitrogen (TAN) in the CSTR (acidogenic reactor) varied greatly when the temperature was in the range of 25-35 ℃. When the temperature decreased from 35 ℃ to 25 ℃, the proportion of acetic acid in total volatile fatty acids (VFAs) decreased from 62.9%-70.5% to 46.3%-59.4%. When the temperature of EGSB (methanogenic reactor) was decreased to 15 ℃, the biogas volumetric yield, proportion of methane and TCOD removal rate were still 127.33 mL/(L·d), 33.3% and 32.3%. The high?throughput sequencing results showed that Methanomicrobiaceae might play an important role in the methanogenesis process at low temperature. The limited acetic acid generation and intensified propionic acid accumulation at low temperature might be one of the reasons for the low methanogenesis efficiency of the biogas project. Therefore, psychrophilic methanogenic agents based on families of Methanomicrobiaceae and Euryarchaeota_unclassified can be further developed.
更新日期/Last Update: 2023-01-01