Effect of pre-treatments on biological methane potential of dewatered sewage sludge under dry anaerobic digestion
Effect of pre-treatments on biological methane potential of dewatered sewage sludge under dry anaerobic digestion
复制标题
预处理对干式厌氧消化脱水污泥生物甲烷潜力的影响
DOI：
10.1016/j.ultsonch.2018.11.022
复制
发表时间：
2019
影响因子：
8.4
通讯作者：
Dhar Bipro R
中科院分区：
文献类型：
--
作者：
Lu Wenjing;Pan Chao;Lama Arun;Fu Xindi;Ye Rong;Dhar Bipro R
为解决脱水污泥生物甲烷势低、干法厌氧消化效率低的问题，研究了脱水污泥的水解强化工艺。不同的预处理，即物理（超声波），化学（酸，臭氧）和组合（超声波-臭氧）的方法进行了研究和评价BMP和生物降解。其中超声预处理的效果最好，BMP提高了104.7%，总固体（TS）、挥发性固体（VS）和化学需氧量（COD）的去除率分别比对照提高了30.1%、36.9%和33.9%。联合预处理（超声-臭氧）显示出更显着的提高比单一的方法，证明了138.2%的BMP和TS，VS，COD分别比对照组降低53.7%，63.7%和57.3%。BMP增量与能量输入、浓度或预处理剂量呈正相关。在测试的方法中，物理预处理优于化学预处理。超声波联合臭氧预处理技术具有良好的节能性和经济可行性。
The aim of the study is to enhance hydrolysis of dewatered sewage sludge to tackle the problem of low biological methane potential (BMP) and low efficiency of dry anaerobic digestion. Different pre-treatment i.e. physical (ultrasonication), chemical (acid, ozone) and combined (ultrasonication-ozone) methods were investigated and evaluated in terms of BMP and biodegradation. Ultrasonic pre-treatment had the best result among the single technologies, the BMP increased by 104.7%, while total solid (TS), volatile solid (VS) and chemical oxygen demand (COD) reduction were improved by 30.1%, 36.9% and 33.9%, respectively, over control. Combined pre-treatment (ultrasonication-ozone) showed more significant enhancement than single methods as evidenced by 138.2% higher BMP and 53.7%, 63.7% and 57.3% more reduction in TS, VS, COD, respectively, over control. The BMP increment positively correlated either with energy input, concentration or dose of pre-treatment applied. Among the tested methods, the physical pre-treatments out-compete chemical ones. Ultrasonic combined with ozone pre-treatment technology has good energy and economic feasibility.