Clarification of phosphorus fractions and phosphorus release enhancement mechanism related to pH during waste activated sludge treatment
Clarification of phosphorus fractions and phosphorus release enhancement mechanism related to pH during waste activated sludge treatment
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澄清废弃活性污泥处理过程中与pH相关的磷组分和磷释放增强机制
DOI：
10.1016/j.biortech.2016.10.010
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发表时间：
2016-12-01
影响因子：
11.4
通讯作者：
Wang, Ai-Jie
中科院分区：
文献类型：
--
作者：
He, Zhang-Wei;Liu, Wen-Zong;Wang, Ai-Jie
本研究旨在厘清废活性污泥（WAS）中磷的组分，探讨不同形态磷随ph的释放性能及增强机制。结果表明，无机磷（IP）是原污泥中主要的磷组分（占总固体磷的87.86%），非磷灰石无机磷（NAIP）是最不稳定的磷形态，占总磷的81.30%，表明WAS可以作为磷矿的潜在替代品。在pH = 4和pH = 12的酸碱条件下，钼酸盐活性磷积累量分别比原液污泥提高了311.20 mg/L和479.18 mg/L，分别是对照的3.80和5.84倍。机理研究表明，高pH促进了NAIP的释放，磷灰石磷对低pH敏感。污泥中磷的释放和可回收程度取决于污泥中不同种类磷的组分和污泥处理的pH调节。(C) 2016 Elsevier Ltd.版权所有。
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.