Research Article
Production and Characterization of Biogas from Cow Dung, Poultry Manure and Their Co-digestion
Daniel Kebede Telo*
,
Zerihun Demrew Yigezu
Issue:
Volume 10, Issue 3, September 2025
Pages:
82-96
Received:
20 July 2025
Accepted:
4 August 2025
Published:
26 August 2025
Abstract: The global demand for energy grows rapidly, and therefore, it is a time to look alternative and renewable resources of energy to replace fossil fuels that harm the environment. On other hand, improper waste management creates environmental pollution and makes it unpleasant and unattractive for residences. Cow dung and poultry manures are the wastes produced from livestock and chicken, and they are important feedstock for biogas production. The main objectives of the present study was therefore, production of biogas from cow dung, poultry manure and their co-digestion, and evaluate the effect of biogas production parameter on the performance of anaerobic digestion process. In this study, batch mode of experimental digesters operated for 60 days at 37±0.5°C using five different ratios of cow dung to poultry manure mixtures as a feedstock. The feedstock were 100% of cow dung (T1), 100% of poultry manure (T2), 50% cow dung and 50% poultry manure mixture (T3), 75% poultry manure and 25% cow dung mixture (T4) and 75% cow dung and 25% poultry manure mixture (T5). The feedstock was characterized in terms of moisture contents (MC), total solids (TS), volatile solids (VS), pH, organic carbon (OC), total Kjeldahl nitrogen (TKN), carbon to nitrogen ratio (C: N) and ash contents (AC). Each digester was operated in triplicate and one way ANOVA was used to compare the characteristics of feedstock, amount and chemical composition of biogas produced from the different mixtures of feedstock. The volatile solid (VS) content was more than 58% in all feedstock and, which indicates that, the feed-stocks were biodegradable and suitable for biogas production. The Carbon to Nitrogen (C: N) ratio was in the range of 6.26±0.25 to 28.75±1.23. Lower C: N ratio (T2) indicates the biogas produced from this feedstock will be low and hence T2 is less preferred for biogas production. The pH value of all the feedstock were feasible for biogas production, except T1 (6.3), and significant difference was observed in all parameters among the feedstock. The total amount of biogas produced from T1, T2, T3, T4 and T5 was 2820ml, 1509ml, 3994ml, 15796ml and 6709ml, respectively. The highest biogas yield was recorded in T4. The quality of biogas in term of methane content was 56.3±0.91, 56.9±10, 57.8±0.95, 60.7±0.1 and 63.6±0.7 for T1, T2, T3, T4 and T5, respectively. In general, the present investigation revealed that, co-digestion encourages the feasibility of biogas from these feedstock. Even though, the methane concentration is higher in T5, T4 (75% poultry manure and 25% cow dung mixture) can be considered as the best feedstock for biogas production as it gives significantly high biogas yield as compared to the others. However, optimization of production parameters and analyzing other production factors need to be investigated in the future.
Abstract: The global demand for energy grows rapidly, and therefore, it is a time to look alternative and renewable resources of energy to replace fossil fuels that harm the environment. On other hand, improper waste management creates environmental pollution and makes it unpleasant and unattractive for residences. Cow dung and poultry manures are the wastes...
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Research Article
Exploring Communication Strategies and Practices with in Reduction Emission from Deforestaion and Degradation Plus Initiatives: A Case Study of Central Ethiopia, Enor District
Negash Mebrat Worku*,
Tibebu Berhane Shiwayirga
Issue:
Volume 10, Issue 3, September 2025
Pages:
97-107
Received:
7 August 2025
Accepted:
19 August 2025
Published:
23 September 2025
DOI:
10.11648/j.ajere.20251003.12
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Abstract: The purpose of this research to improve communication strategies practice by analyze the communication strategies employed by REDD+ programs to enhance awareness and understanding of sustainable forest management among local communities in the Enor District of Central Ethiopia. Guided by participatory communication theory and behavioral change theory. The research evaluates (1) the effectiveness of communication channels (e.g., community meetings, social media, printed materials), (2) the relevance, clarity, and participatory nature of REDD+ messages, and, (3) the strengths and weaknesses of awareness creation approaches. The researche used a mixed-methods approach design. The data were collected through key informant interviews, focuse group discussions and questionnaires, and analyzed with quantitative analysis (descriptive statistics, SPSS) and qualitative thematic content analysis. Findings revealed that face-to-face interactions 88% and community meetings 89% were perceived as the most effective channels, while radio 63% and printed materials 61% had shown ineffectiveness. Although participatory outreach (e.g., experience-sharing) motivated involvement in forest conservation, barriers such as inconsistent messaging 40%, language gaps 32%, and inadequate feedback 46% which hindered awareness efforts. Despite these challenges, effective communication significantly increased community support, underscoring the need for more inclusive, localized strategies. As 83% of respondent believes that the approche needs improvement Thus, these results indicate the communication strategies of the projrct needs improvement for effective awareness cration practices. Therefore, the study recommends addressing language barriers, ensuring message consistency, and integrating community feedback to strengthen REDD+ communication and long-term engagement.
Abstract: The purpose of this research to improve communication strategies practice by analyze the communication strategies employed by REDD+ programs to enhance awareness and understanding of sustainable forest management among local communities in the Enor District of Central Ethiopia. Guided by participatory communication theory and behavioral change theo...
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