文档介绍：Ammonia and pH Inhibition in Anaerobic Treatment
N. Eldem 1, I. Ozturk 1, E. Soyer 1, B. Calli 2, B. Mertoglu 2, and O. Akgiray 2
1 Istanbul Technical University, Faculty of Civil Engineering, Department of Environmental Engineering,
Maslak 80626, Istanbul, Turkey
2 Marmara University, Faculty of Engineering, Department of Environmental Engineering, Goztepe 34722,
Istanbul, Turkey
Abstract Ammonia is a metabolic product in the position of wastes containing proteins, and is known
to have an inhibitory effect on methanogenesis. This paper reports the results of our studies on the inhibitory
effects of ammonia/ammonium and pH on methanogenic activity under mesophilic conditions. 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). A new model was
developed and found to give a very good fit to the