Kusmayadi Adi, Huang Chi-Yu, Kit Leong Yoong, Lu Po-Han, Yen Hong-Wei, Lee Duu-Jong, Chang Jo-Shu
Department of Chemical and Materials Engineering, Tunghai University, Taichung, Taiwan.
Department of Environmental Science and Engineering, Tunghai University, Taichung, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung, Taiwan.
Bioresour Technol. 2023 May;376:128858. doi: 10.1016/j.biortech.2023.128858. Epub 2023 Mar 11.
A sequential anaerobic digestion and phycoremediation process was employed to recover nutrients and remove pollutants from dairy wastewater (DW), while simultaneously producing biomethane and biochemicals. Anaerobic digestion of 100% DW achieved a methane content and production rate of 53.7% and 0.17 L/L/d, respectively. This was accompanied by the removal of 65.5% chemical oxygen demand (COD), 86% total solid (TS), and 92.8% volatile fatty acids (VFAs). The anaerobic digestate was then used to grow Chlorella sorokiniana SU-1. Using 25% diluted digestate as the medium, SU-1 could reach 4.64 g/L biomass concentration, with total nitrogen (TN), total phosphorus (TP) and COD removal efficiencies of 77.6%, 87.1% and 70.4%, respectively. The obtained microalgal biomass (contained 38.5% carbohydrates, 24.9% proteins, 8.8% lipids) was used to co-digest with DW, resulting in good methane production performance. Co-digestion with 25% (w/v) algal biomass obtained a higher CH content (65.2%) and production rate (0.16 L/L/d) than other ratios.
采用顺序厌氧消化和藻类修复工艺从乳制品废水（DW）中回收养分并去除污染物，同时生产生物甲烷和生物化学品。100% DW的厌氧消化产生的甲烷含量和产率分别为53.7%和0.17 L/L/d。同时去除了65.5%的化学需氧量（COD）、86%的总固体（TS）和92.8%的挥发性脂肪酸（VFA）。然后，将厌氧消化液用于培养索氏小球藻SU-1。以25%稀释的消化液为培养基，SU-1的生物量浓度可达4.64 g/L，总氮（TN）、总磷（TP）和COD的去除效率分别为77.6%、87.1%和70.4%。将获得的微藻生物质（含有38.5%的碳水化合物、24.9%的蛋白质、8.8%的脂质）与DW共同消化，产生了良好的甲烷生产性能。与25%（w/v）藻类生物质共同消化获得的CH含量（65.2%）和产率（0.16 L/L/d）高于其他比例。
