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Title: Enhancing volatile fatty acids production from waste activated sludge by a novel cation-exchange resin assistant strategy
Authors: Pang, Heliang
He, Junguo
Ma, Yingqun
Pan, Xinlei
Zheng, Yanshi
Yu, Huarong
Yan, Zhongsen
Nan, Jun
Keywords: Engineering::Environmental engineering
Issue Date: 2021
Source: Pang, H., He, J., Ma, Y., Pan, X., Zheng, Y., Yu, H., Yan, Z. & Nan, J. (2021). Enhancing volatile fatty acids production from waste activated sludge by a novel cation-exchange resin assistant strategy. Journal of Cleaner Production, 278, 123236-.
Journal: Journal of Cleaner Production
Abstract: This study developed a novel strategy for enhancing volatile fatty acids production from waste activated sludge by cation-exchange resin assistant anaerobic fermentation. The process condition was optimized by response surface methodology. Considerable sludge disintegration degree (40.9%) and volatile fatty acids yield (4619.6 mg COD/L) were achievable at the proposed process conditions, i.e. cation-exchange resin dosage = 2.05 and 1.78 g/g SS, fermentation time = 4.97 and 6.46 d, and stirring strength = 246.9 and 261.2 rpm, respectively. Grey relational analysis revealed that cation-exchange resin dosage, fermentation time, and stirring strength presented similarly significant effects on sludge disintegration. The reusability tests showed that NaCl solution had the best effect on cation-exchange resin regeneration, and the performance of regenerated resin was comparable with the original resin on volatile fatty acids production. Compared with conventional pretreatment methods, the proposed cation-exchange resin assistant strategy revealed obvious advantages of saved pretreatment agents, easy operation, none chemical residual in sludge and small footprint. Total volatile fatty acids recovery can reach 1.46 × 108 tons chemical oxygen demand annually in terms of China's context, which could offset one third of carbon gap in China's wastewater treatment plants. The proposed cation-exchange resin assistant strategy indeed sheds lights on the direction for WAS treatment in a close alignment with process viability and engineering feasibility.
ISSN: 0959-6526
DOI: 10.1016/j.jclepro.2020.123236
Research Centres: Nanyang Environment and Water Research Institute 
Advanced Environmental Biotechnology Centre (AEBC) 
Rights: © 2020 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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