3 years ago

Improving methane production and anaerobic digestion stability of food waste by extracting lipids and mixing it with sewage sludge

Anaerobic digestion (AD) of FW shows instability due to both the presence of high lipids and accumulation of volatile fatty acids. In this study, AD of food waste (FW) was optimized by removing lipids (LRFW) and by co-digestion with sewage sludge (1:1w/w on dry matter). The results obtained showed that lipids extraction increased FW methane yield from 400 to 418mL-gVSadded −1 under mesophilic conditions (35°C) and from 426 to 531mL-gVSadded −1 in thermophilic conditions (55°C). Two degradation phases (k 1 and k 2) described FW and LRFW degradation. In the thermophilic, LRFW-k 1 (0.1591d−1) was slightly higher than that of FW (k 1 of 0.1543d−1) and in the second stage FW-k 2 of 0.0552d−1 was higher than that of LRFW (k 2 of 0.0117d−1). The majority of LRFW was degraded in the first stage. FW and sewage sludge co-digestion reduced VFA accumulation, preventing media acidification and improving process stability.

Publisher URL: www.sciencedirect.com/science

DOI: S0960852417313925

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.