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Environmental Science and Pollution Research

, Volume 25, Issue 35, pp 35154–35163 | Cite as

Synchronously enhancing biogas production, sludge reduction, biogas desulfurization, and digestate treatment in sludge anaerobic digestion by adding K2FeO4

  • Shuli Liu
  • Guang Yang
  • Jinwei Fu
  • Guangming Zhang
Research Article
  • 58 Downloads

Abstract

In order to enhance the efficiency and benefits of the sludge anaerobic digestion process, K2FeO4 was added to a sludge anaerobic digestion system, and its effects on the system were comprehensively investigated. Results showed that sludge anaerobic digestion was greatly improved by adding 500 mg/L K2FeO4. Biogas and methane productions were increased by 26.6 and 28.4%, respectively. Sludge reduction, protein removal, and the conversion efficiency of dissolved organics were all improved. The mechanism revealed that the disintegration of sludge flocs, enhancement of protease activity, and decrease of soluble sulfide toxicity on microorganisms contributed to biogas production and sludge reduction. Biogas quality was improved, benefitting from the decreasing H2S content in biogas; as additionally, the cost of biogas desulfuration was reduced. In the biogas slurry treatment, the PO43−-P concentrations were decreased by 39%, which also reduced the cost of the dephosphorization processes at certain extent.

Keywords

Sludge Anaerobic digestion K2FeO4 Biogas quality Biogas slurry treatment 

Notes

Funding information

This work was supported by the National Natural Science Foundation of China (No. 51708214 and No. 51608117), the High-level Personnel Research Startup Project of North China University of Water Resources and Electric Power (No. 40550 and No. 40619), and the Treatment Technology Integration and Demonstration for Domestic Sewage of Typical Villages and Towns in Henan Province (No. 161100310700).

Supplementary material

11356_2018_3438_MOESM1_ESM.doc (102 kb)
ESM 1 (DOC 101 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Shuli Liu
    • 1
    • 2
    • 3
  • Guang Yang
    • 4
  • Jinwei Fu
    • 5
  • Guangming Zhang
    • 6
  1. 1.School of Environmental and Municipal EngineeringNorth China University of Water Resources and Electric PowerZhengzhouChina
  2. 2.Henan Key Laboratory of Water Environment Simulation and TreatmentZhengzhouChina
  3. 3.Henan Engineering Research Center of Water Pollution and Soil Damage RemediationZhengzhouChina
  4. 4.Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijingChina
  5. 5.School of Civil Engineering and CommunicationNorth China University of Water Resources and Electric PowerZhengzhouChina
  6. 6.School of Environment and Natural ResourceRenmin University of ChinaBeijingChina

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