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1

Life cycle assessment and eco-efficiency of para-rubber wood production in Thailand

100%
Phungrassami H., Usubharatana P.
Polish Journal of Environmental Studies
|
2015
|
tom 24
|
nr 5
2

Greenhouse gas emissions of one-day-old chick production

100%
Usubharatana P., Phungrassami H.
Polish Journal of Environmental Studies
|
2017
|
tom 26
|
nr 3
We used life cycle assessment (LCA) methodology to assess the environmental impacts of greenhouse gas (GHG) emissions resulting from one-day-old chick production. The system boundary was set from hatching to the farm gate and involved the three main processes as parent farms, chicken feed production, and hatchery processing. The two main objectives were first to accumulate essential data for green supply chain management throughout the three processes of one-day-old chick production, and second, to identify hotspots and find a holistic solution to reduce GHG emissions within the system boundary. Eight combinations of one-day-old chick production were identified. Results determined that GHG emissions varied between 337 and 383 g CO₂ eq/day-old chick, depending on the combination. Chicken feed processing caused the highest impact at 45-55% as a result of the protein and energy-rich ingredients in the feed formulas. The replacement of chicken feed ingredients with dried distillers grain with solubles (DDGS), peas, cassava root, and cassava leaves was investigated. The best alternative was cassava root, which reduced GHG emissions between 5% and 6%.
3

Life cycle assessment for enhanced efficiency of small power plants by reducing air input temperature

100%
Usubharatana P., Phungrassami H.
Polish Journal of Environmental Studies
|
2018
|
tom 27
|
nr 4
This research aimed to study the relevant work relating to environmental evaluation associated with global warming, acidification, eutrophication, and human toxicity from the 120 MW combined-cycle cogeneration power plant through use of a life cycle assessment. The functional units of study were one kWh of electricity and one ton of steam production. The system boundary of this study comprised unit processes related to a gas turbine power plant and thermal power plant using natural gas. Input data including natural gas and demineralized water in the gas turbine process, while oxygen scavenger chemicals such as neutralizing amine and phosphate were included in the steam turbine process. We found that global warming potential and acidification potential came primarily from gas combustion during the production process, while transportation posted a minor contribution, while eutrophication potential and human toxicity caused by NaOCl was 10%. The feasible ways to reduce environmental impacts included cooling down the air temperature prior to being fed to the compressor using the evaporative method and the fogging method. The results found that the fogging method was proven to reduce global warming potential more significantly than the other method. On the other hand, the evaporative method was more effective in terms of acidification, eutrophication, and human toxicity reduction.
4

Evaluation of opportunities to reduce the carbon footprint of fresh and canned pineapple processing in central Thailand

100%
Usubharatana P., Phungrassami H.
Polish Journal of Environmental Studies
|
2017
|
tom 26
|
nr 4
This study was proposed to estimate the carbon footprint (CF) and analyze the environmental hotspot of pineapple cultivation and canned pineapple production, and offer opportunities to reduce its CF. The studied cultivation area covered 158 ha, divided into small, medium-sized, and large farms. Input data including organic fertilizer, synthetic fertilizer, herbicides, and fossil fuels were included in the cultivation process, while fossil fuels, chemicals, packaging, and wastewater treatment were included in the production process. The results revealed that the CF of pineapple cultivation was 172 g CO₂eq/kg of fresh pineapple, with the main contribution being fertilization usage, which accounted for 58-79% (depending on the size of the farm). In addition, canned pineapple had a CF of 738 g CO₂eq/can (30 oz.), with the main contribution being packaging production at 42%. Moreover, feasible ways to reduce greenhouse gas (GHG) emissions – such as replacing fossil fuels with biomass, using biogas from wastewater treatment as a substitute for fuels used in the factory, humidity reduction in fossil fuels used in steam production, and introducing packaging from recycled cans – were all taken into account in this study.
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