[1]高麗娟,王苗,王怡,等.剩余污泥中溫和高溫厭氧消化長期運行性能研究[J].中國給水排水,2023,39(19):27-32.
GAOLi-juan,WANGMiao,WANGYi,et al.Long-term Operation Performance of Excess Sludge Anaerobic Digestion under Mesophilic and Thermophilic Conditions[J].China Water & Wastewater,2023,39(19):27-32.
剩余污泥中溫和高溫厭氧消化長期運行性能研究
中國給水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第39卷 期數(shù): 2023年第19期 頁碼: 27-32 欄目: 出版日期: 2023-10-01
Title:Long-term Operation Performance of Excess Sludge Anaerobic Digestion under Mesophilic and Thermophilic Conditions
作者:高麗娟1， 王苗2， 王怡2， 彭俊2， 柴寶華1， 韓曉峰1， 寇曉梅1， 莊鵬宇1（1.中國電建集團西北勘測設計研究院有限公司，陜西 西安 710065；2.西安建筑科技大學 環(huán)境與市政工程學院，陜西 西安 710055）
Author(s):GAO Li-juan1， WANG Miao2， WANG Yi2， PENG Jun2， CHAI Bao-hua1， HAN Xiao-feng1， KOU Xiao-mei1， ZHUANG Peng-yu1（1. PowerChina Northwest Engineering Corporation Limited， Xi’an 710065， China； 2. School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China）
關鍵詞:高溫厭氧消化; 長期運行; 微生物群落; 能量衡算
Keywords:thermophilic anaerobic digestion; long-term operation; microbial community; energy balance calculation
摘要:針對目前存在的污泥高溫厭氧消化（TAD）能耗高的問題，設計了不同有機負荷（OLR）下污泥中溫和高溫厭氧消化連續(xù)試驗，分析了溫度及OLR對污泥厭氧消化（AD）的影響，并對系統(tǒng)產能和耗能進行了初步核算。連續(xù)130 d的小試結果表明，當OLR（以VS計）為2.87 g/（L·d）時，TAD系統(tǒng)的單位容積產甲烷速率可達到419.5 mL/（L·d），是中溫厭氧消化（MAD）系統(tǒng)的2.9倍，是OLR為1.79 g/（L·d）時的1.6倍。同時，不同OLR下TAD系統(tǒng)的溶解性COD（SCOD）、總氨氮（TAN）及游離氨（FAN）濃度均高于MAD系統(tǒng)，但揮發(fā)性脂肪酸（VFAs）濃度與MAD系統(tǒng)的相差不大。此外，TAD系統(tǒng)中Methanosarcina為優(yōu)勢古菌屬（占56.4%），而在MAD系統(tǒng)中Methanothrix占主導（占56.9%）。能量衡算表明，TAD系統(tǒng)可以實現(xiàn)能量自給，而MAD系統(tǒng)需要額外的能量輸入�？傮w來看，TAD系統(tǒng)比MAD系統(tǒng)的水解產氣性能更好，而且可滿足能量自給，在城市污水處理廠剩余污泥能源化應用中具有更明顯的優(yōu)勢。
Abstract:This study designed two continuous mesophilic and thermophilic excess sludge anaerobic digestion systems under different organic loading rates (OLR), analyzed the effects of temperature and OLR on sludge anaerobic digestion (AD), and preliminarily calculated the energy production and consumption of the systems, so as to solve the high energy consumption problem of sludge thermophilic anaerobic digestion (TAD). According to the bench?scale experiment operated continuously for 130 days, the methane yield per unit volume of TAD reached 419.5 mL/(L·d) when the OLR was 2.87 g/(L·d) (measured as VS), which was 2.9 times that of the mesophilic anaerobic digestion (MAD) system, and 1.6 times that of the TAD system when the OLR was 1.79 g/(L·d). Besides, the soluble chemical oxygen demand (SCOD), total ammonia nitrogen (TAN) and free ammonia (FAN) in the TAD system under different OLRs were higher than those in the MAD system, whereas the concentrations of volatile fatty acids (VFAs) were not much different from those in the MAD system. In addition, Methanosarcina was the dominant archaea in the TAD system (56.4%), while Methanothrix was the dominant archaea in the MAD system (56.9%). The energy balance calculation showed that the TAD system could achieve energy self? sufficiency, while the MAD system required additional energy input. In general, the TAD system had better performance of hydrolysis and gas production than those of the MAD system, and could realize the energy self?sufficiency. Therefore, TAD has more obvious advantages in the energy production of excess sludge in municipal wastewater treatment plants.
更新日期/Last Update: 2023-10-01
