GAOLi-juan,WANGZhi,WANGYi,et al.Effect of Biochar on Continuous Operation of Sludge Thermophilic Anaerobic Digestion System[J].China Water & Wastewater,2023,39(17):26-31.
生物炭对污泥高温厌氧消化连续运行系统的影响
- Title:
- Effect of Biochar on Continuous Operation of Sludge Thermophilic Anaerobic Digestion System
- Keywords:
- excess sludge; thermophilic anaerobic digestion; biochar; continuous operation; biogas production stability
- 摘要:
- 为了研究添加生物炭对城市污水处理厂剩余污泥高温厌氧消化（TAD）连续运行系统的影响，考察了TAD系统的产甲烷特性及挥发性脂肪酸（VFAs）的历时变化，并对微生物群落结构和沼渣沼液性质进行了分析。结果表明，添加生物炭可促进污泥中VS和VFAs的降解，提高沼气中甲烷含量、产气量及产气稳定性。在有机负荷率（以VS计）为2.87 g/（L·d）的条件下，添加生物炭的污泥TAD平均产甲烷速率为96.89 mL/（gVS·d），比对照组提高了11.96%，同时其日产气量的均值偏差减小了5.54%，产气相对稳定。此外，添加生物炭也会显著影响微生物群落结构，促进产甲烷菌和细菌的种间直接电子转移以及互营代谢，显著提高TAD中氢营养型产甲烷菌的相对丰度。添加生物炭使污泥TAD沼液的TP和PO43--P含量降低了24.42%和34.46%，同时提高了沼渣中的氮、磷、钾含量及植物次生常量营养元素和微量营养元素含量。因此，添加生物炭有利于提高污泥TAD连续运行系统的稳定性，能够提高甲烷产率并改善消化残余物的性质。
- Abstract:
- This paper investigated the methanogenic characteristics and the changes of volatile fatty acids (VFAs) with time in a thermophilic anaerobic digestion (TAD) system, and analyzed the microbial community composition and digestate properties, so as to explore the effects of biochar addition on continuous operation of TAD of excess sludge from municipal wastewater treatment plant. The addition of biochar promoted the degradation of VS and VFAs in sludge, improved the methane content, biogas production and stability of biogas production. When the organic load rate was 2.87 g/(L·d) (calculated as VS), the average methane production rate of TAD system with biochar addition was 96.89 mL/(gVS·d), which was 11.96% higher than that of the control group, and the mean deviation of daily biogas production was reduced by 5.54%, indicating that the biogas production was relatively stable. In addition, the addition of biochar also significantly affected the microbial community composition, promoted the interspecific direct electron transfer and syntrophic metabolism of methanogens and bacteria, and significantly increased the relative abundance of hydrotrophic methanogens in TAD. The addition of biochar reduced the TP and PO43--P in biogas slurry by 24.42% and 34.46%, and increased the contents of nitrogen, phosphorus and potassium as well as the contents of plant secondary macronutrients and micronutrients in digestate. Therefore, the addition of biochar was beneficial to the stability of sludge TAD system in continuous operation, increased the methane yield and improved the properties of digestate.
相似文献/References:
[1]徐志嫱,李瑶,周爱朝,等.污泥热水解过程中磷的释放规律与影响因素[J].中国给水排水,2018,34(21):24.
XU Zhi qiang,LI Yao,ZHOU Ai chao,et al.Phosphate Release and Influencing Factors Analysis during Sludge Thermal Hydrolysis[J].China Water & Wastewater,2018,34(17):24.
[2]张彦平,呼瑞琪,李一兵,等.高铁酸盐氧化剩余污泥溶胞减量研究[J].中国给水排水,2020,36(15):59.
ZHANG Yan-ping,HU Rui-qi,LI Yi-bing,et al.Lysis and Reduction of Excess Sludge by Ferrate Oxidation[J].China Water & Wastewater,2020,36(17):59.
[3]胡德秀,张聪,张艳.超声强化污泥释磷及MAP法磷回收优化研究[J].中国给水排水,2020,36(15):65.
HU De-xiu,ZHANG Cong,ZHANG Yan.Phosphorus Release from Sludge Enhanced by Ultrasound and Optimization of Phosphorus Recovery by Magnesium Ammonium Phosphate Method[J].China Water & Wastewater,2020,36(17):65.
[4]晏习鹏,肖小兰,亓金鹏,等.中试厌氧膜生物反应器对剩余污泥的消化效果[J].中国给水排水,2020,36(19):1.
YAN Xi-peng,XIAO Xiao-lan,QI Jin-peng,et al.Digestion of Excess Sludge in a Pilot Anaerobic Membrane Bioreactor[J].China Water & Wastewater,2020,36(17):1.
[5]孙洋洋,张雨辰,徐苏云.不同来源剩余污泥有机质赋存特征及厌氧消化潜能[J].中国给水排水,2021,37(11):17.
SUN Yang-yang,ZHANG Yu-chen,XU Su-yun.Characteristics of Organic Matters in Excess Sewage Sludge from Different Sources and Their Anaerobic Digestion Potential[J].China Water & Wastewater,2021,37(17):17.
[6]朱赵冉,黄显怀,唐玉朝,等.低速搅拌球磨破解剩余污泥高效释放碳源[J].中国给水排水,2021,37(13):1.
ZHU Zhao-ran,HUANG Xian-huai,TANG Yu-chao,et al.High Efficient Release of Carbon Source from Excess Sludge Disintegrated by Low-speed Stirring and Ball-milling[J].China Water & Wastewater,2021,37(17):1.
[7]赵博玮,牛宇锟,谢飞,等.剩余污泥碳化裂解液的资源化中试研究[J].中国给水排水,2021,37(19):1.
ZHAO Bo-wei,NIU Yu-kun,XIE Fei,et al.Pilot-scale Study on Resource Recycling of Excess Sludge Carbonized Pyrolysis Liquid[J].China Water & Wastewater,2021,37(17):1.
[8]窦川川,刘玉玲,赵鹏鹤,等.碱预处理对剩余污泥DOM的溶出特征及平行因子分析[J].中国给水排水,2021,37(19):14.
DOU Chuan-chuan,LIU Yu-ling,ZHAO Peng-he,et al.Effect of Alkaline Pretreatment on DOM Dissolution Characteristics of Excess Sludge and Parallel Factor Analysis[J].China Water & Wastewater,2021,37(17):14.
[9]罗锋,彭进湖,张忠祥,等.南方污水处理厂污泥厌氧发酵制取碳源及投加策略[J].中国给水排水,2022,38(3):1.
LUO Feng,PENG Jin?hu,ZHANG Zhong-xiang,et al.Preparation of Carbon Source by Anaerobic Fermentation of Sludge in Wastewater Treatment Plant in Southern China and Its Dosing Strategy[J].China Water & Wastewater,2022,38(17):1.
[10]罗璐,施周,许仕荣,等.溶菌酶预处理对剩余污泥脱水性能的影响[J].中国给水排水,2022,38(3):87.
LUOLu,SHIZhou,XUShi-rong,et al.Effect of Lysozyme Pretreatment on Dewatering Performance of Excess Activated Sludge[J].China Water & Wastewater,2022,38(17):87.