Co-digestion of food waste and sewage sludge for methane production: Current status and perspective

Sanjeet Mehariya, Anil Kumar Patel, Parthiba Karthikeyan OBULISAMY, Elumalai Punniyakotti, Jonathan W C WONG*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

234 Citations (Scopus)


Food waste (FW) is a valuable resource which requires sustainable management avenues to reduce the hazardous environmental impacts and add-value for better economy. Anaerobic digestion (AD) is still reliable, cost-effective technology for waste management. Conventional AD was originally designed for sewer sludge digestion, is not effective for FW due to mainly high organics and volatile fatty acid (VFA) accumulation, hence better technical aptitudes and biochemical inputs are required for optimal biogas production. Besides, to overcome these challenges, FW co-digestion with complementary organic waste e.g. sewage sludge (SS) mixed which complement each other for better process design. The main aim of this article is to summarize the recent updates and review different holistic approaches for efficient anaerobic co-digestion (AcoD) of FW and SS to provide a comprehensive review on the topic. Moreover, to demonstrate the status and perspectives of AcoD at present scenario for Hong Kong and rest of the world.

Original languageEnglish
Pages (from-to)519-531
Number of pages13
JournalBioresource Technology
Publication statusPublished - Oct 2018

Scopus Subject Areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

User-Defined Keywords

  • Anaerobic co-digestion
  • Bio-augmentation
  • Electron transfer
  • Food waste
  • Organic loading rate
  • Pre-treatment
  • Sewage sludge


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