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题名: Clarification of phosphorus fractions and phosphorus release enhancement mechanism related to pH during waste activated sludge treatment
作者: He, Zhang-Wei; Liu, Wen-Zong; Wang, Ling; Tang, Cong-Cong; Guo, Ze-Chong; Yang, Chun-Xue; Wang, Ai-Jie
刊名: BIORESOURCE TECHNOLOGY
出版日期: 2016-12
卷号: 222, 页码:217-225
关键词: Waste activated sludge ; Phosphorus species ; Enhancement mechanism ; pH ; Molybdate reactive P accumulation
DOI: 10.1016/j.biortech.2016.10.010
部门归属: 中国科学院环境生物技术重点实验室
英文摘要: This study aimed to clarify phosphorus (P) fractions in waste activated sludge (WAS) and explore release performance and enhancement mechanism of different P species related to pH. Results showed that inorganic P (IP) was the major P fraction in raw sludge (87.86% of total solid P), and non-apatite inorganic P (NAIP), the most labile P forms, occupied 81.30% of IP, suggesting that WAS could be selected as potential substitution of phosphate rock. The optimized acid and alkaline conditions were pH = 4 and pH = 12 for molybdate reactive P accumulation, increased by 311.20 mg/L and 479.18 mg/L compared to raw sludge, which were 3.80 and 5.84 times higher than that of control, respectively. The mechanism study demonstrated that high pH promoted NAIP release, and apatite P was sensitive to low pH. Moreover, the releasable and recoverable P depended on both fractions of different P species in sludge and pH adjustment for sludge treatment. (C) 2016 Elsevier Ltd. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36111
Appears in Collections:中国科学院环境生物技术重点实验室_期刊论文

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