Enhanced high-quality biomethane production from anaerobic digestion of primary sludge by corn stover biochar

Giorgio Mannina, Giorgio Mannina, Bing-Jie Ni, Dongbo Wang, Yiwen Liu, Lai Peng, Xueming Chen, Wei Wei, Dongbo Wang, Huu Hao Ngo, Wenshan Guo

Risultato della ricerca: Articlepeer review

21 Citazioni (Scopus)

Abstract

This study conducted batch and continuous tests to reveal the feasibility of corn stover biochar on improving anaerobic digestion of primary sludge (PS). Dosing biochar (1.82, 2.55 and 3.06 g/g Total Solids (TS)) in digester improved methane content increasing from 67.5% to 81.3–87.3% and enhanced methane production by 8.6–17.8%. Model analysis indicated that biochar accelerated PS hydrolysis and enhanced methane potential of PS. The mechanistic studies showed that biochar enhanced process stability provided by strong buffering capacity and alleviated NH3 inhibition. In continuous test over 116 days, the volatile solids (VS) destruction in the biochar-dosed digester increased by 14.9%, resulting in a 14% reduction in the volume of digestate for disposal. Biochar changed microbial community in an expected direction for anaerobic digestion. This work suggests that biochar technology would apply to co-digestion of WAS and PS to maximize the energy recovery and sludge reduction from the two sludge streams.
Lingua originaleEnglish
pagine (da-a)123159-
Numero di pagine10
RivistaBioresource Technology
Volume306
Stato di pubblicazionePublished - 2020

All Science Journal Classification (ASJC) codes

  • ???subjectarea.asjc.1500.1502???
  • ???subjectarea.asjc.2300.2305???
  • ???subjectarea.asjc.2100.2105???
  • ???subjectarea.asjc.2300.2311???

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