Enhanced phosphorous recovery from Fenton′s reagent conditioning sewage sludge via KHCO3-activated pyrolysis

被引：0
|
作者：
Guo X. [1 ]
Liang S. [1 ]
Yang L. [1 ]
Yang F. [1 ]
机构：
[1] School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan
来源：
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2022年 / 50卷 / 10期
关键词：
Fenton′s reagent conditioning; KHCO[!sub]3[!/sub] activation; municipal sludge; phosphorus recovery; struvite;
D O I：
10.13245/j.hust.221008
中图分类号：
学科分类号：
摘要：
Taking sludge cake conditioned by Fenton′s reagent as research object，biochar was obtained by KHCO3-activated pyrolysis，and struvite products were synthesized from water leaching solution． The effects of Fe2+ dosage in Fenton′s reagent，KHCO3 activation reagent and pyrolysis temperature on phosphorus leaching from biochar were investigated． Experiment results show that KHCO3 addition and pyrolysis temperature increment could promote the conversion of insoluble phosphorus to water-soluble phosphorus in biochar；when the dosage of Fe2+ in Fenton′s reagent is 110 mg per 1 g volatile solid (VS)，the mass ratio of KHCO3 to sludge cake conditioned by Fenton′s reagent is 1:1，and pyrolysis temperature is 500 ℃ ，the phosphorus leaching rate of obtained biochar achieves 90%；after impurity removal of the water leaching solution，the phosphorus recovery efficiency in the form of struvite reaches 79%． © 2022 Huazhong University of Science and Technology. All rights reserved.
引用
收藏
页码：51 / 57
页数：6
相关论文
共 24 条
  • [1] LIU J，, CHENG X，, QI X, Recovery of phosphate from aqueous solutions via vivianite crystallization：thermodynamics and influence of pH[J], Chemical Engineering Journal, 349, pp. 37-46, (2018)
  • [2] (2019)
  • [3] 40, 4, pp. 1-16, (2019)
  • [4] MUNIR M，, LI B，, BOIARKINA I, Phosphate recovery from hydrothermally treated sewage sludge using struvite precipitation[J], Bioresource Technology, 239, pp. 171-179, (2017)
  • [5] 36, 15, pp. 65-72, (2020)
  • [6] 6, 9, pp. 3287-3293, (2012)
  • [7] WANG H, XIAO K K, YANG J K, Phosphorus recovery from the liquid phase of anaerobic digestate using biochar derived from iron-rich sludge： a potential phosphorus fertilizer[J], Water Research, 174, (2020)
  • [8] 40, 4, pp. 1149-1159, (2020)
  • [9] HUANG R, TANG Y．, Speciation dynamics of phosphorus during (hydro)thermal treatments of sewage sludge[J], Environmental Science & Technology, 49, 24, pp. 14466-14474, (2015)
  • [10] QIAN T, YANG Q, Transformation of phosphorus in sewage sludge biochar mediated by a phosphate-solubilizing microorganism[J], Chemical Engineering Journal, 359, pp. 1573-1580, (2019)
123