Propionic acid accumulation in anaerobic digestion of carbohydrates: An investigation on the role of hydrogen gas

Inanc B., Matsui S., Ide S.

WATER SCIENCE AND TECHNOLOGY, cilt.40, sa.1, ss.93-100, 1999 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 40 Sayı: 1
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1016/s0273-1223(99)00368-6
  • Dergi Adı: WATER SCIENCE AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.93-100
  • Anahtar Kelimeler: anaerobic, propionic acid, hydrogen, inhibition, carbohydrate, wastewater, WASTE-WATER, OPERATION, GLUCOSE, H-2, PH
  • Marmara Üniversitesi Adresli: Hayır

Özet

This paper describes the experimental investigation into the accumulation of propionic acid under artificially lowered or elevated hydrogen gas levels. Vacuum operation at 0.13, 0.5, and 0.75 atm on the headspace of the reactors, and a selective permeable Teflon membrane placed in the liquid phase, were used to provide low hydrogen concentrations. In the elevated hydrogen concentration experiments, first, hydrogen gas (20% H(2) - 80% N(2)) Was bubbled into a batch CSTR reactor. Second, purer H(2) gas (80% H(2); 20% CO(2)) was overpressurized at 2 atm in vials. Suspended cultures were used in all the experiments. The results have suggested no inhibition or stimulation effect by elevated or lowered hydrogen on the accumulation of propionic acid. (C) 1999 IAWQ Published by Elsevier Science Ltd. All rights reserved.