Xie Sihuang, Li Xuan, Pham Chau Uyen, Nguyen Hoang Viet, Song Yarong, Chetty Kirthi, Kulandaivelu Jagadeeshkumar, Wang Chengduan, Hai Faisal, Jiang Guangming
School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia.
Advanced Water Management Centre, The University of Queensland, St. Lucia, Queensland 4072, Australia.
Bioresour Technol. 2021 Jun;330:124994. doi: 10.1016/j.biortech.2021.124994. Epub 2021 Mar 15.
Anaerobic co-digestion of primary sludge with two types of drinking water treatment sludge (DWTS), namely iron- or aluminum-rich DWTS (Fe- or Al-DWTS) were systematically evaluated by biochemical methane potential tests, kinetic modelling, downstream process parameters and microbial community analysis. Specific methane yields decreased approximately 19% to 123 mL·g VS, while the hydrolysis constant k decreased from 0.21 d to 0.18 d for Fe-DWTS at 10% to 40% dosages. On the contrary, specific methane yields decreased 45-55% for Al-DWTS, and k decreased to 0.14 d at 40% dosage. Significant removals (>95%) of phosphate and hydrogen sulfide were observed for Fe- and Al-DWTS additions at 40% dosage. Microbial community analysis revealed that Al-DWTS increased the abundance of most hydrogenotrophic methanogens, while Fe-DWTS increased the abundance of acetoclastic methanogens. Kinetic modelling further revealed that Fe- and Al-DWTS additions affected the hydrolysis and methanogenesis process kinetics and the methane yield differently.
通过生化甲烷潜力测试、动力学建模、下游工艺参数和微生物群落分析，系统评估了两种类型的饮用水处理污泥（DWTS），即富含铁或铝的DWTS（Fe-DWTS或Al-DWTS）与原污泥的厌氧共消化。对于Fe-DWTS，在10%至40%的投加量下，特定甲烷产量下降了约19%，至123 mL·g VS，而水解常数k从0.21 d降至0.18 d。相反，对于Al-DWTS，特定甲烷产量下降了45-55%，在40%投加量下k降至0.14 d。在40%投加量下添加Fe-DWTS和Al-DWTS时，观察到磷酸盐和硫化氢的显著去除率（>95%）。微生物群落分析表明，Al-DWTS增加了大多数氢营养型产甲烷菌的丰度，而Fe-DWTS增加了乙酸裂解型产甲烷菌的丰度。动力学建模进一步表明，添加Fe-DWTS和Al-DWTS对水解和产甲烷过程动力学以及甲烷产量有不同影响。
