EFFECT OF SALINITY ON BIOGAS GENERATION FROM ANAEROBIC DIGESTION OF AQUACULTURE WASTEWATERMd. Nurul Islam Siddique, Nazaitulshila Rasit, Noraaini Ali1, Md Rabiul Awal, Zamri Bin Ibrahim and S.B. Ismail
The effect of salinity on biogas generation from anaerobic digestion of aquaculture wastewater was examined in this study. Different food to microorganism proportion were examined (0.29, 0.14, 0.082, 0.27, 0.13, 0.075, 0.27, 0.13 and 0.076), so as to evaluate the digester performance. COD elimination, the highest biogas production were estimated for evaluating the efficiency of the anaerobic system. COD removals were above 85% for all of the salinities. When the saltiness was increased from 0 to 18 g/ l, and a high feed to microorganism proportion (0.28) was utilized the biogas production was diminished. Biogas yield was decreased to 63%, when saltiness was expanded from 0 to 18 g/ l. The examination on the utilization of anaerobic sludge molded at high saltiness shows a promising viewpoint for the treatment of wastewater and to enhance the biogas generation.