TY  - THES
T1  - Effect of pH and ammonium on lipid degradation in the anaerobic digestion of fish processing wastewater
A1  - Nabatilan, Marilou Montevirgen
LA  - English
YR  - 1999
UL  - https://tuklas.up.edu.ph/Record/UP-99796217607596440
AB  - The effects of pH and ammonium on lipid degradation in the anaerobic digestion of fish processing wastewater were determined in batch experiments. These experiments were conducted at pH levels pH 4, pH 5, pH 6, pH 7 and pH 8. LCFA analysis performed at pH 4. Furthermore, it was shown that at pH 8, lipid acidification is limited by lipid hydrolysis. Thus, it shows that lipid hydrolysis is rate limiting at pH 8. No significant differences were observed on lipid degradation among pH treatment levels pH 6, pH 7, and pH 8. Studies on total COD conversions however, suggested that COD hydrolysis, COD acidification, and COD methanogenesis were optimal at pH 7.
AB  - The treatment levels of ammonium (as NH4+-N = 0.0, 0.3, 0.6, 0.9 and 1.5 g/l) did not significantly affect lipid degradation, specifically, lipid acidification. Analysis of total COD conversions (hydrolyzed, acidified, and methanogenized) however, showed significant differences between ammonium levels 0-0.9 g/L and 1.5 g/L. Since the fish wastewater also contain proteins, this difference is considered an effect of protein degradation. Protein degradation (specifically protein acidification) is more susceptible to high ammonium concentration than lipid degradation.
CN  - LG 995 1999 E653 N32
KW  - Fishery processing industries : By-products : Biodegradation.
KW  - Ammonia : Physiological effects.
ER  -