The impact of calcium supplementation on methane fermentation and ammonia inhibition of fish processing wastewater

Eli Hendrik Sanjaya, Hui Cheng, Yu Qin, Kengo Kubota, Gyokuyu Ri

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number125471
JournalBioresource Technology
Volume337
DOIs
Publication statusPublished - 2021 Oct

Keywords

  • Ammonia inhibition
  • Calcium supplementation
  • fish processing wastewater (FPW)
  • Methane fermentation
  • Trace metal supplementation

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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