Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Environment, Yangtze Delta Region Institute of Tsinghua University, Zhejiang, Jiaxing 314006, China; State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Environment, Yangtze Delta Region Institute of Tsinghua University, Zhejiang, Jiaxing 314006, China.
Bioresour Technol. 2024 Feb;394:130275. doi: 10.1016/j.biortech.2023.130275. Epub 2024 Jan 2.
The anaerobic co-fermentation of iron bound phosphorus (P) compounds (FePs)-bearing sludge with corn gluten meal (CGM) and the underlying mechanisms associated with P release and volatile fatty acids (VFAs) production were investigated. The optimal CGM dosage for P release was 0.6 g chemical oxygen demand (COD)/g total suspended solid (TSS), which resulted in an increase in efficiency from 7 % (control sample) to 39 %. However, the optimal CGM dosage for VFAs production was 0.4 g COD/g TSS, and the yield increased from 37.4 (control sample) to 331.7 mg COD/g volatile suspended solid. The addition of CGM enhanced hydrolysis and acidogenesis by supplying abundant organic substrates to promote the growth of hydrolytic and acidogenic bacteria. A higher VFAs/ammonium-nitrogen ratio resulted in a lower pH, which promoted greater FePs dissolution and P release from the sludge. This study provides novel insights into the effects of CGM on P release and VFAs production.
本研究考察了铁结合磷（P）化合物（FePs）含污泥与玉米蛋白粉（CGM）的厌氧共发酵及其与 P 释放和挥发性脂肪酸（VFAs）生成相关的潜在机制。最佳的 CGM 投加量为 0.6 g 化学需氧量（COD）/g 总悬浮固体（TSS），可将 P 释放效率从 7%（对照样品）提高到 39%。然而，最佳的 CGM 投加量为 0.4 g COD/g TSS，VFAs 产量从 37.4 mg COD/g 挥发性悬浮固体（对照样品）提高到 331.7 mg COD/g 挥发性悬浮固体。CGM 的添加通过提供丰富的有机基质来增强水解和产酸作用，从而促进水解和产酸菌的生长。较高的 VFAs/氨氮比导致较低的 pH 值，从而促进了更多的 FePs 溶解和 P 从污泥中的释放。本研究为 CGM 对 P 释放和 VFAs 生成的影响提供了新的见解。
