Search results

This study aims to assess the effect of water variation on bioethanol production from cassava peels (CP) using Saccharomyces cerevisiae yeast as the ethanologenic agent.

The milled CP was divided into three treatment groups in a small-scale flask experiment where each 20 g CP was subjected to two-stage hydrolysis. Different amount of water was added to the fermentation process of CP. The fermented samples were collected every 24 h for various analyses.

The results of the fermentation revealed that the highest ethanol productivity and fermentation efficiency was obtained at 17.38 ± 0.30% and 0.139 ± 0.003 gL⁻¹ h⁻¹. The study affirmed that ethanol production was increased for the addition of water up to 35% for the CP hydrolysate process.

The finding of this study demonstrates that S. cerevisiae is the key player in industrial ethanol production among a variety of yeasts that produce ethanol through sugar fermentation. In order to design truly sustainable processes, it should be expanded to include a thorough analysis and the gradual scaling-up of this process to an industrial level.

This paper is an original research work dealing with bioethanol production from CP using S. cerevisiae microbe.

1. Hydrolysis of cassava peels using 13.1 M H₂SO₄ at 100 ^oC for 110 min gave high Glucose productivity

2. Highest ethanol production was obtained at 72 h of fermentation using Saccharomyces cerevisiae

3. Optimal bioethanol concentration and yield were obtained at a hydration level of 35% agitation

4. Highest ethanol productivity and fermentation efficiency were 17.3%, 0.139 g.L⁻¹.h⁻¹

Hydrolysis of cassava peels using 13.1 M H₂SO₄ at 100 ^oC for 110 min gave high Glucose productivity

Highest ethanol production was obtained at 72 h of fermentation using Saccharomyces cerevisiae

Optimal bioethanol concentration and yield were obtained at a hydration level of 35% agitation

Highest ethanol productivity and fermentation efficiency were 17.3%, 0.139 g.L⁻¹.h⁻¹

Throughout history, tea garden workers are treated as slaves of employers and live an inhuman life in modern society. This paper aims to provide an account of the deplorable community (workers) of the tea garden in Bangladesh.

The authors used a mixed-method research approach to conduct this study. In the first stage, using a semi-structured questionnaire, Focus group discussions (FGDs) were done by forming two groups from two districts to get a clear picture of the tea garden workers’ living standards in Bangladesh. Based on the findings of the FGD, the researchers prepared a structured questionnaire containing the basic elements of their quality of work life. In this stage, the authors collected the information from 200 tea workers about their quality of work life.

The major finding showed that the overall country’s economy is booming because of tea workers’ contributions, but their economic conditions gradually become impoverished. The workers’ are living with colossal poverty and vulnerability. Besides, the workers are supposed to get fundamental rights, including food, clothing, shelter, education and health, but the higher authorities were found indifferent to take the necessary initiative to implement these rights.

The data was collected only from the tea garden workers. This study excluded any other parties (trade union leaders, panchayats, garden managers and owners). Thus, it is suggested that the researchers should conduct a similar study covering the opinion, including all the parties.

Both the workers and the higher authorities of the tea garden might benefit from this study’s findings. Workers will be more aware of their basic rights. The authorities can also prepare some effective policies to improve the overall quality of life of the tea workers.

To the best knowledge of the authors, this is the first study on tea garden workers’ inhuman life in Bangladesh in the entire emerald insight publishers.