Evaluation by respiration measurements (OTR, CTR and RQ) of the biological activity in sludge digestors operated under microaerobic conditions

GENÇ N., YONSEL Y. Ş.

CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY, cilt.21, sa.2, ss.163-168, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 21 Sayı: 2
  • Basım Tarihi: 2007
  • Dergi Adı: CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.163-168
  • Anahtar Kelimeler: oxygen transfer rate, carbon dioxide transfer rate, respiratory quotient, sludge digestion, QUOTIENT, BIOPROCESSES, STABILITY, SYSTEMS, GAS
  • Kocaeli Üniversitesi Adresli: Evet

Özet

Microbial activity measurements (oxygen transfer rate, OTR, carbon dioxide transfer rate CTR and respiratory quotient, RQ) are used to monitor and control biological processes. In this study, the digestion of activated sludge in microaerobic conditions was evaluated. The changes of biological activity during digestion were monitored by respiration activity. The sludge mixtures used were primary plus activated sludge, and baker's yeast plus activated sludge. The biological activity was triggered during the experiments by feeding sugar to the mixtures. The results show that increased activity by adding sugar to digested sludge can be monitored by OTR and CTR, whereas RQ can not be used as an indicator.