Assessment of Anaerobic Co-Digestion Effects of Maize Cob and Poultry Manure on Biogas Yields and Their Digestate Characteristics

2019 ◽  
pp. 1-10
Author(s):  
M. S. Chomini ◽  
V. I. Joshua
Keyword(s):  
Public Health ◽  
Alternative Energy ◽  
Poultry Manure ◽  
Oxygen Demand ◽  
Mixed Substrates ◽  
Chemical Oxygen Demand Removal ◽  
Retention Period ◽  
Standard Methods ◽  
Anaerobic Reactors ◽  
Maize Cob

Aim: The aim of the study was to assess the effects of anaerobic co-digestion of maize cob and poultry manure on biogas yields and their digestate characteristics. Place and Duration of Study: Department of Forestry Technology, Federal College of Forestry, Jos between March and April, 2018. Methodology: Slurries of five co-substrate treatment ratios viz 0:1(T1), 1:3(T2), 1:1(T3), 3:1(T4) and 1:0(T5) of these wastes (in three replicates) were separately fed to 13.6L locally made batch-digesters. The anaerobic reactors were monitored for a 56 day retention period. Weekly biogas yields and some digestate characteristics were measured by standard methods. Results: The cumulative biogas yields was in the order of T3(2481.3 mL/kg) >TI(2197.9 mL/kg) > T4(2163.0 mL/kg) > T2(2116.3 mL/kg) >T5(1713.2 mL/kg), in favor of the mixed substrates. While the percentage C:N reductions ranged from (12.94% - 81.80%), with T5 and T1 recording the highest and lowest values respectively. The chemical oxygen demand removal was in the order of T3(80.70%) > T4(58.00%) >T5(46.81%) >T1(34.15%) >T2(13.16%). The anaerobic digestion (AD) effected reductions in Mg, C, Ca, P, Mn, Zn, Fe, Pb and increase in Cu contents of the digestates across treatments. While the K contents increased in T2(36.72%), T3(229.79%) and T4(220.51%); %N in T3(9.94%), T4(113.19%) and T5(291.84%) and Na increased only in T4(4.55%). The Cu contents indicated % increase in the order of T5(487.5%) >T3(270.97%) >T2(268.10%) >T4(43.66%) >T1(35.82%). Conclusion: The anaerobic co-digestion of these organic wastes had unlocked the alternative energy potentials, enhanced the bioremediation tendency, while promoting sustainable public health and environmental management.

scholarly journals Effect of Anolyte pH on the Performance of a Dual-Chambered Microbial Fuel Cell Operated with Different Biomass Feed

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Md. Abdul Halim ◽  
Md. Owaleur Rahman ◽  
Mohammad Ibrahim ◽  
Rituparna Kundu ◽  
Biplob Kumar Biswas
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
River Water ◽  
Microbial Fuel Cell ◽  
Alternative Energy ◽  
Coulombic Efficiency ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Bioelectricity Generation ◽  
Alternative Energy Resources

Finding sustainable alternative energy resources and treating wastewater are the two most important issues that need to be solved. Microbial fuel cell (MFC) technology has demonstrated a tremendous potential in bioelectricity generation with wastewater treatment. Since wastewater can be used as a source of electrolyte for the MFC, the salient point of this study was to investigate the effect of pH on bioelectricity production using various biomass feed (wastewater and river water) as the anolyte in a dual-chambered MFC. Maximum extents of power density (1459.02 mW·m−2), current density (1288.9 mA·m−2), and voltage (1132 mV) were obtained at pH 8 by using Bhairab river water as a feedstock in the MFC. A substantial extent of chemical oxygen demand (COD) removal (94%) as well as coulombic efficiency (41.7%) was also achieved in the same chamber at pH 8. The overall performance of the MFC, in terms of bioelectricity generation, COD removal, and coulombic efficiency, indicates a plausible utilization of the MFC for wastewater treatment as well as bioelectricity production.

scholarly journals Physicochemical and Genotoxic Evaluations of Singed Cowhide Meat (Ponmo) Wastewater

2018 ◽  
Vol 8 (20) ◽  
Author(s):  
Ebenezer Olasunkanmi Dada ◽  
Hadijat Oluwatobi Osilagun ◽  
Kelechi Longinus Njoku
Keyword(s):  
Public Health ◽  
Negative Impact ◽  
Oxygen Demand ◽  
Exposure Period ◽  
Root Growth Inhibition ◽  
Leather Industry ◽  
Health Practitioners ◽  
Financial Interests ◽  
Nutritional Benefits ◽  
Public Health Practitioners

Introduction. In spite of doubts over the safety and nutritional benefits of singed cowhide meat, called ponmo in some parts of Nigeria, and its potential negative impact on the hide and leather industry, consumption in Nigeria and many parts of Africa has continued unabated. Objectives. In the present study, physicochemical and genotoxic assessments of wastewater used to rinse ready-to-cook singed cowhide meat were carried out. Methods. Physicochemical analyses were carried out using the American Public Health Association procedures, while genotoxic assessment was carried out using Allium cepa chromosome assay. Results. The results of the physicochemical analyses indicated that some of the parameters, especially metals, were within the threshold of the limits set by the country's regulatory agencies, but some parameters like phosphate, chloride, nitrate, biological oxygen demand, and chemical oxygen demand were higher in concentration. The wastewater inhibited the growth of A. cepa roots and caused a decrease in its mitotic index relative to the control onions exposed to water only. The highest root growth inhibition of 72.14% was induced by a 10% wastewater concentration, while the lowest (53.57%) was induced by a 5% wastewater concentration. In addition, the wastewater induced bi-nucleated, attached, vagrant, C-mitosis, sticky and bridged chromosomal aberrations. Wastewater at a 5% concentration induced the highest significant (P < 0.05) percentage chromosome aberration of 36.62% at 48 hours of exposure. Sticky chromosomes had the highest significant frequency (P <0.01) at the end of the 72-hour exposure period. No chromosomal aberration was observed in the control. Conclusions. These results indicate that singed cowhide meat wastewater is potentially genotoxic and environmentally harmful. Governments, public health practitioners, and relevant stakeholders should work in synergy to discourage the habit of processing cowhide into cowhide meat. Competing Interests. The authors declare no competing financial interests.

Use of dairy reject and fermented Aleo sp. Leaf Gel mixture in the biological Pre-treatment of landfill leachate

2018 ◽  
Vol 13 (1) ◽  
pp. 219-228 ◽  
Author(s):  
Kasmi Mariam ◽  
Elleuch Lobna ◽  
Abidi Haifa ◽  
Cherni Yassmine ◽  
Hosni Cyrine ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Organic Matter ◽  
Size Effect ◽  
Landfill Leachate ◽  
Yeast Strain ◽  
Oxygen Demand ◽  
Treatment Efficiency ◽  
Chemical Oxygen Demand Removal ◽  
Pre Treatment ◽  
Aloe Gel

Abstract In this study the biotreatability of Jebel Chakir landfill leachate (Tunisia) using a mixture of dairy industry reject (bactofugate) and Aloe sp. leaf gel was evaluated. The effect of Aloe gel fermentation using Saccharomyces cerevisiae yeast strain was investigated against some selected bacterial and fungal strains. The inoculation size effect of the treatment mixtures (2, 6, 10 and 12%) in the treatment efficiency was also studied. The obtained results showed that when natural Aloe gel and bactofugate mixtures were used the recorded chemical oxygen demand removal rates exceeded 56% within 48 h of treatment. Whereas, the use of the fermented Aloe gel in the treatment mixtures has promoted the organic matter removal to reach 72%.

Chemical Oxygen Demand Removal from Wastewater by Integrated Bioreactor

2015 ◽  
Vol 8 (5) ◽  
pp. 238-243 ◽  
Author(s):  
Ezerie Henry Ezec ◽  
Shamsul Rahman Bin Mohamed Ku ◽  
Mohamed Hasnain Is ◽  
Amirhossein Malakahmad ◽  
Salihi Umar Ibrahim
Keyword(s):  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Chemical Oxygen Demand Removal ◽  
Integrated Bioreactor
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