PREPARATION OF PHOSPHORUS REMOVAL MATERIAL BY CALCINATION OF WATER TREATMENT PLANT SLUDGE AND RIVER SILT AND ITS PERFORMANCE

JIN Hongyi; Tang Xueping; Zhuang Mazhan; Gong Chunming; Wu Xiaohai; LI Fei; ZHOU Zhenming

doi:10.13205/j.hjgc.202308027

Volume 41 Issue 8

Aug. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(8): 209-217

JIN Hongyi, Tang Xueping, Zhuang Mazhan, Gong Chunming, Wu Xiaohai, LI Fei, ZHOU Zhenming. PREPARATION OF PHOSPHORUS REMOVAL MATERIAL BY CALCINATION OF WATER TREATMENT PLANT SLUDGE AND RIVER SILT AND ITS PERFORMANCE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 209-217. doi: 10.13205/j.hjgc.202308027

Citation:

JIN Hongyi, Tang Xueping, Zhuang Mazhan, Gong Chunming, Wu Xiaohai, LI Fei, ZHOU Zhenming. PREPARATION OF PHOSPHORUS REMOVAL MATERIAL BY CALCINATION OF WATER TREATMENT PLANT SLUDGE AND RIVER SILT AND ITS PERFORMANCE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 209-217. doi: 10.13205/j.hjgc.202308027

Citation:

JIN Hongyi, Tang Xueping, Zhuang Mazhan, Gong Chunming, Wu Xiaohai, LI Fei, ZHOU Zhenming. PREPARATION OF PHOSPHORUS REMOVAL MATERIAL BY CALCINATION OF WATER TREATMENT PLANT SLUDGE AND RIVER SILT AND ITS PERFORMANCE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 209-217. doi: 10.13205/j.hjgc.202308027

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PREPARATION OF PHOSPHORUS REMOVAL MATERIAL BY CALCINATION OF WATER TREATMENT PLANT SLUDGE AND RIVER SILT AND ITS PERFORMANCE

doi: 10.13205/j.hjgc.202308027

1. College of Civil Engineering, Huaqiao University, Xiamen 361021, China;
2. Xiamen Institute of Environmental Science, Xiamen 361021, China;
3. CCCC First Highway Xiamen Engineering Co., Ltd., Xiamen 361000, China

Received Date: 2022-11-28
Available Online: 2023-11-15

Abstract

Abstract

In order to explore a new way of resource utilization of water treatment plant sludge and river silt, this paper studied the feasibility of preparing phosphorus removal material (C-WTPS/RS) by calcination of their mixture. The mixing ratio of raw materials and calcination temperature were optimized, the main influencing factors of phosphorus removal performance of C-WTPS/RS were analyzed, and the adsorption mechanism of C-WTPS/RS for phosphorus removal was discussed. The results of optimization experiments showed that when the calcination time was 1h, the optimal mixing ratio (dry weight) of WTPS to RS was 5∶5, the optimal calcination temperature was 600 ℃, then the phosphorus adsorption capacity of C-WTPS/RS reached 0.707 mg/g (with an initial concentration of orthophosphate of 2 mg/L), and C-WTPS/RS did not release ammonia nitrogen and organic matter into the water. The phosphorus adsorption capacity of C-WTPS/RS increased with the increase in dosage. When the reaction temperature was within 15 to 25 ℃, the phosphorus adsorption capacity of C-WTPS/RS increased with the increase of the reaction temperature. When the reaction temperature was within 25 to 35 ℃, the phosphorus adsorption capacity of C-WTPS/RS was less affected by the reaction temperature. The phosphorus adsorption capacity of WTPS/RS was stable when the solution pH was 3~9, and the phosphorus adsorption capacity of WTPS/RS showed a downward trend when the solution pH was higher than 9. SO₄^2-, Cl^- and NO₃^- had little effect on the phosphorus adsorption of C-WTPS/RS, and HCO₃^- had a certain inhibitory effect on the phosphorus removal performance of C-WTPS/RS. Thermodynamic analysis showed that the adsorption of phosphorus by C-WTPS/RS was a spontaneous endothermic process, The phosphorus adsorption kinetics of C-WTPS/RS was more consistent with the quasi-second-order kinetic model, and the adsorption isotherms were consistent with the Langmuir adsorption isotherm model, indicating that the phosphorus removal process by C-WTPS/RS was mainly monolayer chemisorption, accompanied by physical adsorption, and the theoretical saturated phosphorus adsorption capacity was 6.26 mg/g.
- phosphorus removal,
- water treatment plant sludge,
- river sludge,
- calcination,
- adsorption

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References(29)

References

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