Effect of sewage sludge addition on the startup of the anaerobic digestion of OFMSW


Demirekler E., Anderson G.

ENVIRONMENTAL TECHNOLOGY, cilt.19, sa.8, ss.837-843, 1998 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 19 Sayı: 8
  • Basım Tarihi: 1998
  • Doi Numarası: 10.1080/09593331908616740
  • Dergi Adı: ENVIRONMENTAL TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.837-843
  • Anahtar Kelimeler: anaerobic digestion, organic fraction of municipal solid waste, performance, sewage sludge, stability, start-up, MUNICIPAL SOLID-WASTE, ORGANIC FRACTION, PERFORMANCE
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

The performances and stabilities of three laboratory-scale semi-batch anaerobic digesters, operated at 35 degrees C, treating organic fraction of municipal solid waste (OFMSW) and primary sewage sludge (PSS) mixed at various ratios were compared during the start-up period. The OFMSW:PSS ratios in the feeds to the three digesters were 100:0, 80:20, and 60:40 on a total solids (TS) basis and their organic loading rates (OLR) were 5.2 kg VS m(-3) d(-1), 3.9 kg VS m(-3) d(-1), and 3.2 kg VS m(-3) d(-1), respectively. There were no indications of failure in any of the digesters. However, addition of primary sewage sludge significantly decreased the imbalances observed during the start-up and improved the process performance. The best performance in terms of specific gas production rate (SGPR) was obtained with a feedstock having an OFMSW:PSS ratio of 80:20. The use of inoculum from an operating anaerobic digester enabled a quick start-up and the reactors were capable of handling high OLRs from the beginning of the experiment.