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Related Experiment Video

Updated: Jul 2, 2026

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
09:46

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

Published on: May 19, 2019

[Characteristics of high solid content sludge with microwave irradiation].

Wei Qiao1, Wei Wang, Rui Xun

  • 1Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. qw04@mails.tsinghua.edu.cn

Huan Jing Ke Xue= Huanjing Kexue
|September 4, 2008
PubMed
Summary

Microwave irradiation effectively hydrolyzes high solid content sludge, enhancing anaerobic biodegradation and methane production. Sludge solid content significantly impacts VSS and SS solubilization, with optimal results observed at 9% solid content.

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Last Updated: Jul 2, 2026

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
09:46

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

Published on: May 19, 2019

Transformation of Organic Household Leftovers into a Peat Substitute
08:43

Transformation of Organic Household Leftovers into a Peat Substitute

Published on: July 9, 2019

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for Cu(II) Through Microwave Pre-Pyrolysis
10:44

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for Cu(II) Through Microwave Pre-Pyrolysis

Published on: February 12, 2019

Area of Science:

  • Environmental Engineering
  • Biotechnology
  • Waste Management

Context:

  • Sludge treatment and disposal pose significant environmental challenges.
  • High solid content sludge requires efficient pre-treatment methods for improved biodegradability.
  • Microwave irradiation offers a rapid and effective approach for sludge hydrolysis.

Purpose:

  • To investigate the effects of microwave irradiation on the hydrolysis of high solid content sludge (7%, 9%, 13%).
  • To evaluate the impact of microwave-assisted hydrolysis on the anaerobic biodegradation of sludge.
  • To determine the optimal conditions for sludge hydrolysis and subsequent methane production.

Summary:

  • Microwave irradiation rapidly increased sludge temperature, accelerating volatile suspended solid (VSS) and suspended solid (SS) solubilization.
  • Higher sludge solid content (13%) showed lower VSS and SS dissolution compared to 7% and 9% sludge.
  • Optimal hydrolysis of 9% sludge at 170°C for 5 min yielded significant SCOD, TOC, and NH4+-N concentrations.
  • Anaerobic biodegradation of microwave-treated sludge improved methane production, with a 9% sludge sample showing a 30.8% increase.

Impact:

  • Microwave hydrolysis significantly enhances sludge biodegradability and methane yield.
  • This method offers a promising pre-treatment strategy for improving anaerobic digestion efficiency.
  • Understanding the influence of solid content is crucial for optimizing microwave-assisted sludge treatment processes.