STUDY ON PHOSPHORUS RECOVERY EFFICIENCY USING THREE CRYSTAL SEEDS AND THE PRODUCTS

LIU Xue-yu; LIN Yu; WANG Fang-zhou; YAN Bing-fei; XIAO Shu-hu; WEI Dong-yang

doi:10.13205/j.hjgc.202002011

Volume 38 Issue 2

Feb. 2020

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LIU Xue-yu, LIN Yu, WANG Fang-zhou, YAN Bing-fei, XIAO Shu-hu, WEI Dong-yang. STUDY ON PHOSPHORUS RECOVERY EFFICIENCY USING THREE CRYSTAL SEEDS AND THE PRODUCTS[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(2): 81-85,139. doi: 10.13205/j.hjgc.202002011

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LIU Xue-yu, LIN Yu, WANG Fang-zhou, YAN Bing-fei, XIAO Shu-hu, WEI Dong-yang. STUDY ON PHOSPHORUS RECOVERY EFFICIENCY USING THREE CRYSTAL SEEDS AND THE PRODUCTS[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(2): 81-85,139. doi: 10.13205/j.hjgc.202002011

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STUDY ON PHOSPHORUS RECOVERY EFFICIENCY USING THREE CRYSTAL SEEDS AND THE PRODUCTS

doi: 10.13205/j.hjgc.202002011

1. Research institution of water Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
2. Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences, Beijing 100083, China;
3. South China Institute of Environmental Sciences, MEP, Guangzhou 510655, China

Received Date: 2019-01-28

Abstract

Abstract

Removal and recovery of phosphate from simulated supernatant of sewage sludge anaerobic digestion effluent were compared using CaO, MgO and dolemite lime(D-Lime)as the crystal seeds respectively, and the kinetics and the surface morphology of the products were analyzed. The results indicated that the removal rate of phosphate were all over 95% using the three crystal, seeds with the condition of initial phosphorus concentration of 0.645 mmol/L, molar ratio of nitrogen to phosphorus of 8:1, and pH value of 7.80. The phosphorus recovery resction was subject to the first order model. However, The high concentration of CO₃^2- significantly inhibited the phosphorus removal rate while the CaO was used, but the decline of phosphorus removal rate were limited when the crystal seed was MgO or D-Lime. Moreover, the experimental results also demonstrated that MAP crystals could be obtained in the presence of crystal seed containing Mg²⁺.
- phosphorus recovery,
- crystal seed,
- chemical precipitation,
- kinetics

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References(29)

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