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Int J Environ Res Public Health

Title:		Effect of Different Acid and Base Potassium Ferrate Pretreatment on Organic Acid Recovery by Anaerobic Digestion of Sludge
Author(s):		Tian M; Liu F; Guo J; Li W; Zhang M; Li X;
Address:		"School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China. Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, China. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China"
Journal Title:		Int J Environ Res Public Health
Year:		2022
Volume:		20221116
Issue:		22
Page Number:		-
DOI:		10.3390/ijerph192215093
ISSN/ISBN:		1660-4601 (Electronic) 1661-7827 (Print) 1660-4601 (Linking)
Abstract:		"Potassium ferrate has strong oxidation in both acid and alkali environments, which has attracted extensive attention. However, the impact of the pH environment on this coupling process with the goal of resource recovery has not received attention. Under the goal of the efficient recovery of organic acid, the changes of solid-liquid characteristics of sludge after acid and alkaline ferrate pretreatment and during anaerobic digestion were discussed. The results showed that compared with blank control groups, after alkaline ferrate pretreatment, the volatile suspended solids (VSSs) decreased the most, reaching 28.19%. After being pretreated with alkaline ferrate, the sludge showed the maximum VFA accumulation (408.21 COD/g VSS) on the third day of digestion, which was 1.34 times higher than that of the acid ferrate pretreatment. Especially in an alkaline environment, there is no need to add additional alkaline substances to adjust the pH value, and the effect of sludge reduction and acid production is the best"
Keywords:		*Sewage/chemistry Anaerobiosis *Iron Compounds Acids Organic Chemicals VFAs anaerobic digestion potassium ferrate sludge reduction;
Notes:		"MedlineTian, Mengjia Liu, Feng Guo, Jiawen Li, Wei Zhang, Mao Li, Xiang eng Research Support, Non-U.S. Gov't Switzerland 2022/11/27 Int J Environ Res Public Health. 2022 Nov 16; 19(22):15093. doi: 10.3390/ijerph192215093"