Filling in sewage sludge biodrying gaps: Greenhouse gases, volatile organic compounds and odour emissions

Daniel González, Nagore Guerra, Joan Colón, D. Gabriel, Sergio Ponsá, Antoni Sánchez

Research output: Contribution to journalArticleResearch

1 Citation (Scopus)

Abstract

© 2019 Elsevier Ltd In the present work, a complete study of the sewage sludge (SS) biodrying technology was conducted at bench-scale, aiming at assessing its performance and providing a valuable insight into the different gaseous emission patterns found for greenhouse gases (GHG) and odorant pollutants. As process key parameters, temperature, specific airflow, dynamic respiration index, final moisture content and Lower Calorific Value (LCV) were evaluated. At the end of the biodrying, a product with a 35.9% moisture content and a LCV of 7.1 MJ·kg−1product was obtained. GHGs emission factor was 28.22 kgCO2eq per Mg of initial mass of dry matter in the SS (DM0-SS). During the biodrying process, maximum odour concentration measured was 3043 ou·m−3 and the estimated odour emission factor of the biological treatment was 3.10E + 07 ou per Mg DM0-SS. Finally, VOCs were completely identified and quantified. The most abundant VOCs found in the biodrying gaseous emissions were terpenes, sulphur-compounds and ketones.
Original languageEnglish
Article number121857
Pages (from-to)121857
Number of pages8
JournalBioresource Technology
Volume291
DOIs
Publication statusPublished - 1 Nov 2019

Keywords

  • Biodrying
  • Gaseous emission
  • Greenhouse gases (GHG)
  • Odour
  • Sewage sludge
  • Temperature
  • Sewage
  • Greenhouse Gases/chemistry
  • Odorants
  • Volatile Organic Compounds/chemistry
  • QUALITY
  • PREDICTION
  • BIOLOGICAL TREATMENT
  • FORCED AERATION
  • MANURE
  • TREATMENT PLANTS

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