Md. Refat Hossain

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• M.Sc. Eng. (Civil)
• Professor (Assistant) at Bangladesh University of Textiles

Cultivation and harvesting of microalgal biomass are energy-intensive and expensive processes. Hence, this study explored the effect of substituting microalgal biomass with faecal sludge (wet-waste) at different ratios (100:0, 25:75, 50:50, 75:25, and 0:100) for biocrude production through hydrothermal liquefaction. Among the various ratios, the co...

Bioenergy production from biomass through thermochemical conversion is an emerging technological advancement that can offset the use of fossil fuels and reduce greenhouse gas (GHGs) emissions. This study investigated novel co-hydrothermal liquefaction (co-HTL) using peat (P) and wastewater-grown microalgae (MA) for enhancing biocrude production as...

Faecal sludge (FS) and drained peatlands have become the hotspots research area in recent years, causing significant environmental pollution and greenhouse gas (GHGs) emissions. Hence, this study explored the co-hydrothermal liquefaction (co-HTL, 300ºC for 60 min) of peat (P) and FS at different ratios (100:0, 25:75, 50:50, 75:25, and 0:100 % of P:...

While wetlands have been extensively investigated for restoration and global warming concerns, less attention has been paid to utilizing them for clean energy generation. Another abundant renewable bio-resource currently polluting our environment is solid wastes, where 600 - 700 million tons/y of waste is exposed in an unmanaged way. To mitigate th...

Today's world is facing a great economic crisis due to the increasing rate of fuel prices as well as irreversible depletion of it has gained major concern regarding future energy security. To mitigate such a problem this study investigated co-liquefaction (co-HTL) of faecal sludge (FS) and water hyacinth (WH) at varying FS to WH ratios (3:1, 1:1, 1...

The textile industry produces a considerable amount of processing waste that is dumped in landfills rather than recycling. Textile wastewater comprises a variety of hazardous and non-biodegradable dyes. This study investigated the decolorization process of three different model dye pollutants (vat dye, reactive dye, methylene blue), and industrial...

Textile wastewater is one of the major contributors to environmental pollution, necessitating treatment before being discharged into nearby surface water bodies. In this study, laboratory-scale biological (anaerobic) co-treatment of textile and domestic wastewater was conducted at a temperature of 37°C for 14 days in a 1L batch reactor. The experim...

Sludge from textile wastewater treatment facilities is becoming a major impediment to the environment. Current sludge management practices such as landfilling, and incineration can be criticized for their adverse environmental impacts. To investigate the potential, this study aimed to broadly conduct analyses on a textile sludge sample collected fr...

The conventional energy supply system is often seen as unsustainable so transitioning to waste-to-energy is a growing trend. This study investigated co-hydrous pyrolysis (co-HP) of textile sludge (TS) and tannery fleshing wastes (TFW) at varying TS:TFW ratios (1:0, 3:1, 1:1, 1:3, and 0:1) for biocrude production. The maximum 38.31% biocrude yield o...

Bangladesh is one of the hubs of the textile industry in the world; consequently, microfibers are an emerging threat to the aquatic ecosystem. Traditional effluent treatment plants (ETPs) might not be capable of removing most emerging pollutants like surfactants, dyes, and additives, including microfibers, and the textile industry may be a major so...

Bioenergy production from biomass through thermochemical conversion is an emerging technological advancement that can offset the use of petroleum products and reduce greenhouse gas (GHGs) emissions. This study investigated the potentiality of peat (partially decayed organic matter) called 2nd generation biomass as a bioenergy resource. The proximat...

Shrimp shell waste generated from shrimp processing industries is one of the leading issues contributing to environmental pollution and health hazards. The common practice for its management is disposal or burning of the waste, which is not environmentally safe due to the shells’ low degradability or burning capability. In this situation, transform...

Microalgae harvesting is an expensive and energy-intensive process. The application of chitosan, a waste-derived natural flocculant, for microalgae harvesting and biocrude quality enhancement might overcome this challenge. This study explored the optimization of microalgae harvesting by shrimp waste-derived chitosan and the production of high-quali...

While wetlands have been extensively investigated for restoration and global warming concerns, less attention has been paid to utilizing them for clean energy generation. Another abundant renewable bio-resource currently polluting our environment is solid wastes, where 600 -700 million tons/y of waste is exposed in an unmanaged way. To mitigate the...

Groundwater is an essential source of drinking purpose. Groundwater samples were collected from tube-wells from Rajbandh, Khulna dumping site as well as its adjoining area to find out the level of concentration of different water quality parameters. In order to find out the strength and the linear relationship between different pairs of parameters...

Anyone can gain skills about urban planning, environmental protection, engineering design, wastewater engineering through this course.

One can easily learn from this course about the most important water treatment methods at household level, successful implementation strategies and about assessing the impact of HWTS.

An online non-credit course authorized by University of Copenhagen and offered through Coursera. What is air pollution? What are the sources? How and where are we exposed outdoors and indoors? What happens in the body? Which diseases are the result? Who are the most vulnerable? How can we assess the effects of air pollution? And what should we do t...

WASH is the collective term for Water, Sanitation and Hygiene. Due to their interdependent nature, these three core issues are grouped together to represent a growing sector. While each a separate field of work, each is dependent on the presence of the other. For example, without toilets, water sources become contaminated; without clean water, basi...

It is an online based course on medical waste management like municipal solid waste management.

Khulna is the 3rd largest metropolitan industrial and port city in Bangladesh. The enhancement of business and financial activities resulted in a sharp increase in city population. Therefore, the amount of municipal solid waste (MSW) generation has increased with population. A pilot scale sanitary landfill and an open dumped site are situated at Ra...

Groundwater samples were collected from tube-wells from Rajbandh dumping site as well as its adjoining area. Concentration of physico-chemical parameters including heavy metals (As, Fe, Mn, Zn, Cu) and microbiological parameters TC and FC were determined in groundwater sample inside Hogladanga landfill. Among physico-chemical parameters alkalinity...