Impact of low-thermal pretreatment on physicochemical properties of saline waste activated sludge, hydrolysis of organics and methane yield in anaerobic digestion
Impact of low-thermal pretreatment on physicochemical properties of saline waste activated sludge, hydrolysis of organics and methane yield in anaerobic digestion
复制标题
低温预处理对含盐废活性污泥理化性质、厌氧消化有机物水解及甲烷产率的影响
DOI：
10.1016/j.biortech.2019.122423
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发表时间：
2020-02-01
影响因子：
11.4
通讯作者：
Wu, Di
中科院分区：
文献类型：
--
作者：
Biswal, Basanta Kumar;Huang, Hao;Wu, Di
研究了低温预处理（60-120 ℃）对含盐废水活性污泥厌氧消化的影响。结果表明，提高预处理温度和延长预处理时间，可显著提高有机物的水解率（溶解性化学需氧量提高4.2-11.9倍）和挥发性固体的去除率（最高可达24.6%）。温度从60 ℃升高到120 ℃，碳水化合物和蛋白质的溶解分别加快了5.6-43.8倍和8.9-35.9倍。低温（60摄氏度）促进氨和磷酸盐的快速释放。热处理对沼气产量有积极的影响，当预处理温度为60，80，100和120 ℃时，甲烷产量分别提高了13.7%，27.0%，29.0%和29.6%。预处理温度/持续时间和污泥性质之间观察到显着的正相关关系。能源经济评价表明，80 ℃预处理污泥厌氧消化在经济上更可行。因此，低温预处理技术可用于提高厌氧消化的甲烷产率。
This work studied the influence of low-thermal pretreatment (60-120 degrees C) on anaerobic digestion of saline waste activated sludge. The findings showed higher temperature and longer pretreatment time considerably improve organics hydrolysis (soluble chemical oxygen demand increased by 4.2-11.9 times) and volatile solid reduction (maximum 24.6%). Carbohydrate and proteins solubilization accelerated by 5.6-43.8 times and 8.9-35.9 times, respectively by temperature rose from 60 to 120 degrees C. Low temperature (60 degrees C) promotes faster release of ammonia and phosphate. Thermal treatment had positive effect on biogas production because methane yield was enhanced by 13.7, 27.0, 29.0 and 29.6% when pretreated at 60, 80, 100 and 120 degrees C, respectively. Significant positive relationships observed between pretreatment temperature/duration and sludge properties. Energy and economic assessment displayed anaerobic digestion of 80 degrees C pretreated sludge is more economically feasible. Thus, low-thermal pretreatment technology could be useful for improvement of methane yield in anaerobic digestion.