在剩余活性污泥碱性发酵过程中多次使用氯化镁。
Multiple uses of magnesium chloride during waste activated sludge alkaline fermentation.
机构信息
School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China; Solid Waste Reduction Section, Environmental Agency of Bogor Regency, Bogor Regency, West Java 16911, Indonesia.
School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, People's Republic of China.
出版信息
Bioresour Technol. 2019 Oct;290:121792. doi: 10.1016/j.biortech.2019.121792. Epub 2019 Jul 12.
Multiple uses of magnesium chloride during waste activated sludge (WAS) alkaline fermentation was investigated. The results revealed that a higher MgCl concentration inhibited acidogenesis, while the purity of volatile fatty acids (VFAs) improved and the maximum percentage of VFAs accounted for 52.92% (w/w) of soluble chemical oxygen demand (SCOD) at 120 mmol/L Mg. A phosphate removal efficiency of 81.22% was obtained at 15 mmol/L MgCl concentration, while only a 14.77% increase was observed when further MgCl was added (120 mmol/L MgCl). Capillary suction time (CST) values decreased sharply from 4410.20 s to 207.30 s with the increase of MgCl. A similar trend was observed in bound water and the minimum value was 85.56 ± 0.06%. The distribution of extracellular polymeric substances (EPS) and rheological profiles of the fermented sludge were also analyzed and the results confirmed that a high MgCl concentration had a positive effect on sludge dewatering.
研究了镁氯化物在废活性污泥（WAS）碱性发酵过程中的多种用途。结果表明，较高的 MgCl 浓度会抑制产酸，而挥发性脂肪酸（VFAs）的纯度提高，最大 VFAs 百分比达到 120mmol/L Mg 时占可溶化学需氧量（SCOD）的 52.92%（w/w）。在 15mmol/L MgCl 浓度下，磷酸盐去除效率达到 81.22%，而当进一步添加 MgCl（120mmol/L MgCl）时，仅观察到 14.77%的增长。随着 MgCl 的增加，毛细抽吸时间（CST）值从 4410.20s 急剧下降到 207.30s。结合水也呈现出类似的趋势，最小值为 85.56±0.06%。还分析了细胞外聚合物物质（EPS）的分布和发酵污泥的流变特性，结果证实高浓度的 MgCl 对污泥脱水有积极影响。
Zotero 插件