Waste to energy studies from the past years had caught the attention of public because it promotes new source of energy without harming the environment and reducing our waste at the same time. In order to use waste as energy, studies about characterizations need to be evaluated. A study conducted by N.C.I. Furuvik et., al (2016) about characterization of biomass from wood observed the moisture, heating value, content of volatile components and ash residue of chips from oak, birch, pine, and spruce. The chips were first pulverized and then its HHV was measured using a bomb calorimeter. Using software, thermogravimetric analyses were carried out and Nabertherm muffle was used in the analysis of ash residue. After the necessary procedures were performed, results shows that the heating values of oak, pine, birch and spruce were measured to 17.7 MJ/kg, 19.1 MJ/kg, 17.6 MJ/kg and 18.7 MJ/kg respectively. The thermogravimetric analyses of wood indicate that biomass is highly reactive due to the fast pyrolysis process. The volatile matter content varied from 73–79%. The ash content from samples with long residence time was almost the same as for samples with shorter residence time and the ash content is less than 1% for all samples. Hence, it is important to obtain more information about the structure and the composition of the different types of wood in order to know how heating temperatures and rates affect the pyrolysis process.
Another study about characterization of biomass residue as renewable energy resources was conducted by Saima Sohni et., al (2017) wherein different biomass residues were used in order to provide detailed comparison between various physicochemical properties and to understand the effect of chemical composition and structure of biomass residues on biofuel potential. Results show a huge potential of selected biomass residue as a biofuel.
Several existing literature about the potential bioactive compounds present in food waste material and the transformation of it into animal feed was discussed in the study of Alexander Gearganas et., al (2020). The study concludes that food waste is capable to be transformed as animal feed. However, if food wastes were not treated properly, it may show difference in nutrient composition and potential hazards. Different characteristics such as nutritional composition of various food waste, effects in growth performance of feeding food waste to pigs and poultry, and the quality traits of meat must be further assessed.
Additionally, to evaluate the role of bioenergy in climate mitigation over the next century, Walter Reid, et., al (2019) compared the data regarding global trend of utilization of biomass as a fuel from several existing literature and studies. The study concludes that the scale of bioenergy that both provides net climate benefits and can be sustainably produced is more limited than most models and scenarios predict. Hence, altering fossil fuels by using bioenergy should result in a significant decrease of emission over the short time periods that matter for climate impacts. Also, the process of energy production should not generate problems connected with air or water. The proponents also gave emphasis concerning the government in order to successfully use the bioenergy as a new source.
Since I'm working with my new thesis topic, I decided to share with you my reviews regarding various study about biomass.
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