The impact of calcium supplementation on methane fermentation and ammonia inhibition of fish processing wastewater.
The effect of trace metal supplementation on the methane fermentation of fish processing wastewater (FPW) was studied in both batch and continuous experiments using a self-agitated anaerobic baffled reactor (SA-ABR). In the batch experiments, a single supplementation of Ca2+, Co2+ and Fe2+ was show to have a significant positive impact on the performance of methane fermentation. The continuous experiment results showed that supplementation with 1.5 g-Ca2+/L-substrate remarkably enhanced the performance of methane fermentation of the SA-ABR in treating FPW with the optimal organic loading rate achieved at 7.62 g-COD/L/d. During the steady states (stages 2 to 5), the average removal efficiencies of COD, protein, carbohydrate and lipid were 89, 85, 80 and 91%, respectively. The biogas conversion rates were in the range of 0.39 to 0.45 L-biogas/g-COD with a high methane content of 74%. Besides, Ca2+ supplementation also improved the resistance of the methane fermentation system to ammonia inhibition.
['Sanjaya|Eli Hendrik|EH|', 'Cheng|Hui|H|', 'Qin|Yu|Y|', 'Kubota|Kengo|K|', 'Li|Yu-You|YY|']
D000641:Ammonia D000693:Anaerobiosis D019149:Bioreactors D002118:Calcium D019587:Dietary Supplements D005285:Fermentation D008697:Methane D062065:Waste Water
Calcium supplementation Methane fermentation Ammonia inhibition Trace metal supplementation fish processing wastewater (FPW)