文档介绍：JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH
Part A—Toxic/Hazardous Substances & Environmental Engineering
Vol. A39, No. 9, pp. 2405–2420, 2004
Ammonia and pH Inhibition in Anaerobic Treatment of
Wastewaters, Part I: Experimental
Nursen O¨z Eldem,1 Izzet Ozturk,1 Elif Soyer,1 Baris Call|,2
and O¨mer Akgiray2,*
1Faculty of Civil Engineering, Department of Environmental Engineering,
Istanbul Technical University, Maslak, Istanbul, Turkey
2Faculty of Engineering, Department of Environmental Engineering, Marmara
University, Goztepe, Istanbul, Turkey
ABSTRACT
The influences of pH and ammonia on methane production in the anaerobic
treatment of an acetic-propionic-butyric acid mixture in batch reactors operated
at 37C were investigated. Two independent sets of experiments were carried out
using seeds from two different full-scale industrial anaerobic treatment reactors.
One of the seeds (‘‘Sludge A’’) was obtained from an upflow anaerobic sludge-
blanket (UASB) reactor treating the waste from a potato chips production plant.
The second sludge seed (‘‘Sludge B’’) was from an expanded granular sludge-
blanket (EGSB) reactor treating a corn processing waste. Experiments were
carried out at four different pH values (, , , ) and with six different
TAN (Total Ammonia Nitrogen) values (262 mg/L (control), 1000, 1500, 2000,
2500, 3000). Three vials (triple runs) were used for each pH and TAN value. The
sludge seeds used in the inhibition tests were not exposed to high levels of
ammonia at any stage before the tests. For each vial, cumulative methane
production was monitored for a period long enough for the termination of biogas
production. Although neither sludge was acclimated to ammonia, the lag-phase
*Correspondence: O¨mer Akgiray, Faculty of Engineering, Department of Environmental
Engineering, Marmara University, Goztepe 81040, Istanbul, Turkey; E-mail: ******@eng.
.
2405
DOI: -20