评估水热炭对污泥厌氧消化产生短链脂肪酸的潜在影响。
Evaluating the potential impact of hydrochar on the production of short-chain fatty acid from sludge anaerobic digestion.
机构信息
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, China.
出版信息
Bioresour Technol. 2017 Dec;246:234-241. doi: 10.1016/j.biortech.2017.07.051. Epub 2017 Jul 11.
In this study, waste activated sludge (WAS) was used as feedstock to generate hydrochars at different temperatures (220°C and 260°C) and their effect on sludge anaerobic digestion was evaluated. Experimental results showed that the maximum yield of short-chain fatty acid (SCFA) enhanced by hydrochar (220°C) and hydrochar (260°C) were 507.33 and 270.80mg chemical oxygen demand (COD)/L respectively, which were much higher than that in blank (141.49mg COD/L). Mechanism investigation confirmed that hydrochar remarkably accelerated the solubilization and hydrolysis of organic matters, enhanced the acidification of hydrolyzed products, and inhibited the activity of methanogenic bacteria as well as promoted the activities of key enzymes. Meanwhile, the organic matters especially humic substances existed in the hydrochar played an important role during anaerobic digestion.
本研究以剩余活性污泥（WAS）为原料，在不同温度（220°C 和 260°C）下制备水热炭，并评估其对污泥厌氧消化的影响。实验结果表明，水热炭（220°C）和水热炭（260°C）可分别将短链脂肪酸（SCFA）的最大产量提高 507.33 和 270.80mg 化学需氧量（COD）/L，明显高于空白组（141.49mg COD/L）。机理研究证实，水热炭可显著促进有机物的溶解和水解，增强水解产物的酸化，并抑制产甲烷菌的活性，同时促进关键酶的活性。此外，水热炭中存在的有机物特别是腐殖质在厌氧消化过程中发挥了重要作用。
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