脱水污水污泥干厌氧消化前处理对生物甲烷潜力的影响。
Effect of pre-treatments on biological methane potential of dewatered sewage sludge under dry anaerobic digestion.
机构信息
School of Environment, Tsinghua University, Beijing 100084, China; Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, Beijing 100084, China.
School of Environment, Tsinghua University, Beijing 100084, China; Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, Beijing 100084, China.
出版信息
Ultrason Sonochem. 2019 Apr;52:224-231. doi: 10.1016/j.ultsonch.2018.11.022. Epub 2018 Nov 26.
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.
本研究旨在增强脱水污水污泥的水解作用，以解决生物甲烷潜能（BMP）低和干法厌氧消化效率低的问题。研究考察并评估了不同的预处理方法，包括物理（超声）、化学（酸、臭氧）和组合（超声-臭氧）方法，从 BMP 和生物降解角度进行评价。在单一技术中，超声预处理的效果最好，BMP 增加了 104.7%，而总固体（TS）、挥发性固体（VS）和化学需氧量（COD）的去除率分别提高了 30.1%、36.9%和 33.9%。与单一方法相比，组合预处理（超声-臭氧）的效果更为显著，BMP 增加了 138.2%，TS、VS、COD 的去除率分别增加了 53.7%、63.7%和 57.3%。BMP 的增加与预处理的能量输入、浓度或剂量呈正相关。在所测试的方法中，物理预处理优于化学预处理。超声联合臭氧预处理技术具有良好的能源和经济可行性。
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