Md. Shiblur Rahaman
Dr. Md. Shiblur Rahaman, Assistant Professor, Department of Environmental Science and Disaster Management, Noakhali Science and Technology University. He holds Bachelor of Science and Master of Science degree in Environmental Sciences from Jahangirnagar University, Dhaka, Bangladesh and has more than 3 years of teaching and research experience in Environment Science. He has awarded PhD from the Faculty of Environmental Earth Science, Hokkaido University, Japan. He intensively worked on Environmental Toxicology, water quality monitoring and assessment, and wastewater treatment. He has the plan to continue his work in the environment and sustainable development sector. He is highly motivated, hard-working, goal-oriented and committed to works with multidisciplinary groups. During his undergraduate years, he was involved in various extracurricular activities and research.
Supervisors: Dr. Masaaki Kurasaki, Dr. Khabir Uddin, and Dr. Shafi M. Tareq
Address: Department of Environmental Science and Disaster Management, Noakhali Science and Tecnology University, Noakhali-3814, Bangladesh.
Supervisors: Dr. Masaaki Kurasaki, Dr. Khabir Uddin, and Dr. Shafi M. Tareq
Address: Department of Environmental Science and Disaster Management, Noakhali Science and Tecnology University, Noakhali-3814, Bangladesh.
less
InterestsView All (6)
Uploads
present study investigate the feasibility of vermicomposting process to transform the textile sludge amended with cow dung in different ratio into value added products by using an epigeic earthworm Eisenia foetida. Seed germination bioassay also investigated using mustard seeds (Brassica nigra) in order to evaluate the toxicity and maturity tests of those different mixtures and their produced composts. The result revealed that the E. foetida did not survive in fresh textile sludge. But worms grew and reproduced in textile sludge spiked with cow dung feed mixtures. Presence of more than 20% of textile sludge in feed mixture affected biomass gain and cocoon production largely by earthworms. The net weight gained by E. foetida in 100% cow dung was three fold higher than the feed mixture of 50% cow dung + 50% textile sludge. After 13 weeks, maximum cocoons (56 cocoons) were counted in 100% cow dung and minimum (6 cocoons) in 50% cow dung + 50% textile sludge feed mixture. Vermicomposting resulted in pH shift toward slightly acidic, significant reduction in TOC and C:N ratio, and increase in nitrogen phosphorus and sulphur content. Total potassium content, calcium content and heavy metal’s (Cu, Cr, Pb, Zn, Fe, Mn) content were lower in the final product than initial feed material. The results of phytotoxicity test showed that all the vermicompost products had the higher seed germination percentage, root elongation percentage and germination index than their respective initial feed mixtures. The feed mixtures having the textile sludge had various phytotoxic compounds which might inhibit seed germination before vermicomposting. But the vermicomposts of different feed mixtures having the presence of 100% cow dung
and 10% - 20% textile sludge were matured compost and had no phytotoxic effects as they had the germination index higher than 60. All the results indicated that vermicomposting (using E. foetida) is a suitable technology for the decomposition of textile sludge into value added materials. This textile sludge could be converted into good quality manure by vermicomposting if mixed in appropriate ratio (up to 20% on dry weight basis) with cow dung.
irrigation and drinking water, and as a sink for wastewater. In order to characterize the seasonal variability
of surface water quality in these two rivers and its confluence, a Water Quality Index (WQI) was calculated
from ten physicochemical parameters, periodically measured at three sampling sites round a year. The
results indicated a relatively good water quality in the pre-monsoon and the seasonal order of pollution monsoon>pre-monsoon. Water quality conditions were critical during the monsoon, mainly due to the effects of the terrestrial runoff as well as wastewater of densely populated catchments
representative of 4 different seasons were collected from 5 different sampling locations from
Rayermahal to Sachibunia to analyse major physico-chemical parameters and trace metals according to the Standard Methods. The results of the study, comparing with the World Health Organization and Bangladesh Standards, reveal the suitability of the groundwater for drinking purpose. Suitability for irrigation was also assessed and found low as most of the calculated parameters reveal high values which can render salinity and alkali hazard to soils on long term use in irrigation. The results shown that all the groundwater samples were contaminated with high salinity in the study area, and are in the ‘Doubtful to Unsuitable’ or ‘Unsuitable’ category and are
unsuitable to irrigate all soils.
present study investigate the feasibility of vermicomposting process to transform the textile sludge amended with cow dung in different ratio into value added products by using an epigeic earthworm Eisenia foetida. Seed germination bioassay also investigated using mustard seeds (Brassica nigra) in order to evaluate the toxicity and maturity tests of those different mixtures and their produced composts. The result revealed that the E. foetida did not survive in fresh textile sludge. But worms grew and reproduced in textile sludge spiked with cow dung feed mixtures. Presence of more than 20% of textile sludge in feed mixture affected biomass gain and cocoon production largely by earthworms. The net weight gained by E. foetida in 100% cow dung was three fold higher than the feed mixture of 50% cow dung + 50% textile sludge. After 13 weeks, maximum cocoons (56 cocoons) were counted in 100% cow dung and minimum (6 cocoons) in 50% cow dung + 50% textile sludge feed mixture. Vermicomposting resulted in pH shift toward slightly acidic, significant reduction in TOC and C:N ratio, and increase in nitrogen phosphorus and sulphur content. Total potassium content, calcium content and heavy metal’s (Cu, Cr, Pb, Zn, Fe, Mn) content were lower in the final product than initial feed material. The results of phytotoxicity test showed that all the vermicompost products had the higher seed germination percentage, root elongation percentage and germination index than their respective initial feed mixtures. The feed mixtures having the textile sludge had various phytotoxic compounds which might inhibit seed germination before vermicomposting. But the vermicomposts of different feed mixtures having the presence of 100% cow dung
and 10% - 20% textile sludge were matured compost and had no phytotoxic effects as they had the germination index higher than 60. All the results indicated that vermicomposting (using E. foetida) is a suitable technology for the decomposition of textile sludge into value added materials. This textile sludge could be converted into good quality manure by vermicomposting if mixed in appropriate ratio (up to 20% on dry weight basis) with cow dung.
irrigation and drinking water, and as a sink for wastewater. In order to characterize the seasonal variability
of surface water quality in these two rivers and its confluence, a Water Quality Index (WQI) was calculated
from ten physicochemical parameters, periodically measured at three sampling sites round a year. The
results indicated a relatively good water quality in the pre-monsoon and the seasonal order of pollution monsoon>pre-monsoon. Water quality conditions were critical during the monsoon, mainly due to the effects of the terrestrial runoff as well as wastewater of densely populated catchments
representative of 4 different seasons were collected from 5 different sampling locations from
Rayermahal to Sachibunia to analyse major physico-chemical parameters and trace metals according to the Standard Methods. The results of the study, comparing with the World Health Organization and Bangladesh Standards, reveal the suitability of the groundwater for drinking purpose. Suitability for irrigation was also assessed and found low as most of the calculated parameters reveal high values which can render salinity and alkali hazard to soils on long term use in irrigation. The results shown that all the groundwater samples were contaminated with high salinity in the study area, and are in the ‘Doubtful to Unsuitable’ or ‘Unsuitable’ category and are
unsuitable to irrigate all soils.