6 research outputs found
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Social practices required for the recovery of cassava waste for heat generation in Thailand
Thailand is a dominant supplier of cassava to world markets, supplying around 67% of the global market, resulting in abundant cassava waste. However, farmers typically discard this waste in cassava fields, and thus it is underutilised as an energy resource. In addition, Thailand’s domestic cassava-based bioethanol plants depend on imported coal to produce heat. To address this challenge, this research investigated the potential for the collection and recovery of cassava waste from farms. Semi-structured interviews were conducted with Thai cassava farmers. Social practice theory was applied to evaluate the effects of cassava waste collection on Thai cassava farmers’ current agricultural practices. Three Thai cassava agricultural activities— land preparation, fertilization application and waste management—would be impacted by this new strategy. The connections between each of these potentially affected activities has been discussed and, ultimately, cassava waste collection by Thai cassava growers was proposed as a new practice. This study concluded that the enhanced use of cassava waste for the production of heat and power could potentially help Thailand meet its renewable energy targets in future
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An environmental impact assessment of the management of cassava waste: a case study in Thailand
In Thailand, cassava waste is one of the main biomass residues and has the potential to be used as a biomass fuel. However, currently most cassava waste in Thailand is left in agricultural fields or burnt on site and is not utilised for any energy-related purposes.
This research investigates the environmental impacts associated with three cassava waste management practices including (i)- ploughing the waste to the soil (ii)-burning the waste in the field (iii)- collecting and using the waste in cassava-based bioethanol plant. The environmental impact assessment and material flow analysis associated with these management practices were conducted using the Global Emissions Model for Integrated Systems (GEMIS) package [1]. The outcomes of this study reveal that the CO2 emissions associated with these waste management practices are about 0.195, 0.243 and 0.361 kg CO2-eq/kg of as received (wet) cassava waste, respectively. Compared to other cassava waste disposal methods such as ploughing and burning, cassava waste collection would result in the biggest environmental impact, emitting nearly 85% more GHGs than ploughing and 48% more than burning
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Review of the potential for co-firing of cassava rhizome for generating heat and power in cassava based bio-ethanol plant in Thailand
Biomass is an important source of energy in Thailand and is currently the main renewable energy source, accounting for 40% of the renewable
energy used. The Department of Alternative Energy and E�ciency (DEDE), Ministry of Thailand, has been promoting the use of renewable
energy in Thailand for the past decade. The new target for renewable energy usage in the country is set at 25% of the �nal energy demand in
2021. Thailand is the world’s fourth largest producer of cassava and this results in the production of signi�cant amounts of cassava rhizome
which is a waste product. Cassava rhizome has the potential to be co-�red with coal for the production of heat and power. With suitable
co-�ring ratios, little modi�cation will be required in the co-�ring technology. This review article is concerned with an investigation of the
feasibility of co-�ring cassava rhizome in a combined heat and power system for a cassava based bio-ethanol plant in Thailand. Enhanced use
of cassava rhizome for heat and power production could potentially contribute to a reduction of greenhouse gas emissions and costs, and
would help the country to meet the 2021 renewable energy target