The role of pH in mesophilic anaerobic sludge solubilization
- Authors
- Gomec, Cigdem Y.; Kim, Moonil; Ahn, Y; Speece, Richard E.
- Issue Date
- Feb-2002
- Publisher
- MARCEL DEKKER INC
- Keywords
- acidogenesis; anaerobic digestion; hydrolysis; municipal sludge; pH
- Citation
- JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING, v.37, no.10, pp 1871 - 1878
- Pages
- 8
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
- Volume
- 37
- Number
- 10
- Start Page
- 1871
- End Page
- 1878
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/46861
- DOI
- 10.1081/ESE-120015467
- ISSN
- 1093-4529
1532-4117
- Abstract
- The effect of pH on anaerobic solubilization of synthetic sludge (dog food) and domestic primary sludge was investigated and compared. Anaerobic solubilization was carried out in Continuously Stirred Anaerobic Reactors at mesophilic temperature (35degreesC) and pH was fixed at 6.5 (pH-controlled). The aim of pH control in the reactors consisting of synthetic and primary sludge, was the evaluation of retardation in hydrolysis/acidogenesis at low pH values. Since synthetic and primary sludge have different biodegradation characteristics, the results were compared. In both sludges, acetic acid was the main Volatile Fatty Acids (VFAs) produced. Volatile Suspended Solid (VSS) reduction was found as 67% in about 20 days in the anaerobic digestion of synthetic sludge, whereas for the same interval VSS reduction could only be achieved by 32% in primary sludge at 35degreesC in the pH-controlled reactors. hen both types of sludges were used as substrates, the reactors removed VSS with a corresponding production of VFAs and Soluble Chemical Oxygen Demand (SCOD). However, in the pH-controlled reactors production of VFAs and SCOD was ceased after 5 days in primary sludge whereas VFAs and SCOD production continued after 5 days in synthetic sludge which indicated that hydrolysis and fermentation in the anaerobic solubilization reactors were not complete and continued longer. On the other hand, in the pH-controlled reactor of primary sludge, methanogenic phase could operate after 5 days of operation as hydrolysis/acidogenesis stopped.
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.