Improvement of aquaculture wastewater co-digestion performance by cattle dung using a thermophilic pilot reactor and fertiliser recovery

Md. Nurul Islam Siddique, . and Zaied Khalid, . and Nora’aini Ali, . and Shahrul Ismail, . and Sajal Kumar Adhikary, . and Mohd Zamri Ibrahim, . (2024) Improvement of aquaculture wastewater co-digestion performance by cattle dung using a thermophilic pilot reactor and fertiliser recovery. Journal of Sustainability Science and Management (Malaysia), 19 (4). pp. 1-9. ISSN 2672-7226

The fundamental challenge to balancing the fuel demand is the risk of process instability. Research on energy recovery from aquaculture effluent addresses energy demands and environmental pollution concerns. The current study examined the effectiveness of anaerobic co-digestion of aquaculture effluent in a 45 L thermophilic reactor without utilising chemical catalysts. The partially digested cow manure created a substantial buffering capacity in this co-digestion process that balanced the volatile fatty acids (VFA). The methane produced was 0.45 m³ CH₄/kg VS, whereas 71% of the chemical oxygen demand (COD) was removed. Thermophilic wet co-digestion was used to shorten the digestion and co-digestion phases. The results showed the highest methane was produced after 5 days (0.085 m³ CH₄/(kgVSday), and 81% of total methane potential was attained after 9 days. The system proficiency for eliminating volatile solids was more than 36% after 6 days. Sludge recovery was 0.08 m³ sludge/m³ wastewater and water recovery was 0.85 (m³ sludge/m³ wastewater). It is suggested that wet co-digestion at a thermophilic state was favourable for the commercial application of co-digestion of aquaculture wastewater.

Full text available from: Official URL: https://jssm.umt.edu.my/wp-content/uploads/2024/07...

Abstract

The fundamental challenge to balancing the fuel demand is the risk of process instability. Research on energy recovery from aquaculture effluent addresses energy demands and environmental pollution concerns. The current study examined the effectiveness of anaerobic co-digestion of aquaculture effluent in a 45 L thermophilic reactor without utilising chemical catalysts. The partially digested cow manure created a substantial buffering capacity in this co-digestion process that balanced the volatile fatty acids (VFA). The methane produced was 0.45 m³ CH₄/kg VS, whereas 71% of the chemical oxygen demand (COD) was removed. Thermophilic wet co-digestion was used to shorten the digestion and co-digestion phases. The results showed the highest methane was produced after 5 days (0.085 m³ CH₄/(kgVSday), and 81% of total methane potential was attained after 9 days. The system proficiency for eliminating volatile solids was more than 36% after 6 days. Sludge recovery was 0.08 m³ sludge/m³ wastewater and water recovery was 0.85 (m³ sludge/m³ wastewater). It is suggested that wet co-digestion at a thermophilic state was favourable for the commercial application of co-digestion of aquaculture wastewater.

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Item Type:	Article
AGROVOC Term:	biogas
AGROVOC Term:	Anaerobic digestion
AGROVOC Term:	anaerobic treatment
AGROVOC Term:	microorganisms
AGROVOC Term:	volatile fatty acids
AGROVOC Term:	chemical oxygen demand
AGROVOC Term:	waste treatment
AGROVOC Term:	soil amendments
Geographical Term:	Malaysia
Uncontrolled Keywords:	Aquaculture wastewater
Depositing User:	Mr. Khoirul Asrimi Md Nor
Date Deposited:	05 Mar 2025 03:48
Last Modified:	05 Mar 2025 03:48
URI:	http://webagris.upm.edu.my/id/eprint/2471

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