不同条件下厨余与污泥共发酵效率及能耗分析 - 环境工程学报.pdfVIP

第 11卷　 第7 期 环 境 工 程 学 报 Vol. 11,No.7 2 0 1 7 年 7 月 Chinese Journal of Environmental Engineering July 2 0 1 7 不同条件下厨余与污泥共发酵效率及能耗分析 ∗ 李浩,李倩 ,王高骏,王晓昌 西安建筑科技大学环境与市政工程学院,西安 710055 摘　 要　 从甲烷产率、系统稳定性,以及产、耗能的角度系统分析了温度及有机负荷率(OLR)对厨余垃圾和剩余污泥共发 酵过程的影响。 结果表明,甲烷产率随负荷增加呈现先增加后减小的趋势,且高温系统甲烷产率显著高于中温系统,最大 -1 -1 甲烷产率分别为407.92 mL ·(g VS) 及 357.86 mL ·(g VS) 。 在负荷提升过程中,中、高温系统均出现了以丁酸为主 -1 的有机酸积累,但当OLR增至 15.93 (g VS) ·(L ·d) 后,高温系统仍能实现稳定运行。 通过能耗分析可知,当负荷高于 -1 5.05 (g VS) ·(L ·d) 后,共发酵系统逐渐由耗能状态转变为产能状态,在高负荷运行条件下,高温发酵系统净产能显著 高于中温系统,且具有甲烷产率高、稳定强的优势,所以在厨余垃圾和剩余污泥共发酵过程中更加具有应用前景。 关键词　 厌氧发酵;厨余垃圾;剩余污泥;有机负荷率;能耗分析 中图分类号　 X705　　 文献标识码　 A　　 文章编号　 1673-9108(2017)07-4305-08　　 DOI:10.12030/ j.cjee.201605057 Analysis of efficiency and energy consumption of co-digestion of food waste and waste activated sludge under different operational conditions ∗ LI Hao,LI Qian ,WANG Gaojun,WANG Xiaochang School of Environmental Municipal Engineering,Xi′an University of Architecture Technology,Xi′an 710055,China Abstract　 The effects of temperature and OLR on the co-digestion of food waste and waste-activated sludge (WAS)were investigated,considering efficiency,stability,and net energy production. Itwasfound that the meth- ane yield initially increased and then decreased with increasing OLR. Moreover,the methane yield of the ther- mophilic system was significantly higher than that of the mesophilic system,and the respective maximum methane -1 yieldswere407.92 and357.86 mL ·(g VS) . With increasing OLR,VFAs started to accumulate,and butyrate became the main component of accumulated VFAs in both mesophilic and thermophilic systems. As the OLR in-