Cassava Waste Management and Biogas Generation Potential in Selected Local Government Areas in Ogun State, Nigeria

Abstract

Agricultural products such as cassava produce huge amounts of waste when processed into consumable goods. The waste generated is generally considered to contribute largely to environmental pollution. This study therefore investigates the waste management practice that is adopted by cassava processors in Ogun State, Nigeria. Five local government areas (LGAs) dominant in processing cassava were selected for the study on the basis of spatial location distribution, landmass, and population. The survey involved the use of structured questionnaires administered to cassava processors of the selected LGAs. The Statistical Package for Social Sciences (SPSS) software application and descriptive statistics were used for data analysis. Results of the analysis show that the majority (70%) of the cassava processors are females. Cassava peel constitutes 10% of the waste produced, of which 91% is heaped at refuse dumps in most communities. Results also reveal that 86.3% of cassava residues are used for animal feeds. Other findings show that the peels, when dried, are used as biofuel for cooking and there is a significant potential for biogas production. From the data captured from respondents during the study, most processors are willing to pay for an improved waste management system. The study therefore recommends the proper waste management of cassava waste to minimize environmental pollution.

Smallholder Agroprocessors’ Willingness to Pay for Value-Added Solid-Waste Management Solutions

“…The processors in cooperative/partnership ownership may also not have sole decision-making power in determining the use to which solid waste is put in the processing concern. This finding is in contrast with Olukanni and Olatunji [13], that found dumping as the most common waste management system used by over 90.0% of the cassava processors in Ogun State, Nigeria.…”

“…After dewatering, the resultant semi-solid mass is sieved, and the ungrated fibre (chaff) is discarded as the final solid waste [11]. Cassava peel is the primary solid cassava waste that constitutes 20 to 25.0% of the weight of the roots [12,13]. The proportion of waste can be higher, especially during hand peeling [14].…”

“…Few cassava processors derive any financial benefit from cassava waste [5], while most of them lack either awareness or expertise regarding the conversion of waste to any form of useful resource. However, studies [13,20] have shown that agricultural waste can be profitably utilized and recycled without attendant externalities.…”

Potential Recovery of Biogas from Lime Waste after Juice Extraction Using Solid–Liquid Extraction Process

“…dried pulp for feeding animals, essential oils useful in aromatherapy, fragrances, cosmetics, nutritional supplements, domestic household products and pharmaceutical formulations, pectins and citric acid, and biogas generated from anaerobic digestion [4,[9][10][11][12][13][14][15]. The chemical composition of CW consists of high concentrations of soluble sugars [3,16], making it a suitable source of cellulosic biomass for biofuel (bioethanol and biogas) generation [17,18]. Conversion of biomass to biogas is done through an anaerobic digestion process, under mesophilic or thermophilic conditions, which sustainably utilizes the potential of CWs [19].…”

“…Additionally, a number of pre-treatment processes have the extra advantage of essential oil recovery, which has proven useful in the pharmaceutical, cosmetic, food, and pest control industries [20]. A maximum oil yield of 1.34 The chemical composition of CW consists of high concentrations of soluble sugars [3,16], making it a suitable source of cellulosic biomass for biofuel (bioethanol and biogas) generation [17,18]. Conversion of biomass to biogas is done through an anaerobic digestion process, under mesophilic or thermophilic conditions, which sustainably utilizes the potential of CWs [19].…”