Environmental burdens and health implications analyses of water supply and sanitation systems in Dhaka, Bangladesh | |
| Author | Mollah, Kabirul Ahsan |
| Call Number | AIT Thesis no.EV-06-12 |
| Subject(s) | Sanitation--Bangladesh--Dhaka Water-supply--Bangladesh--Dhaka Environmental health--Bangladesh--Dhaka |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Conventional sanitation systems like septic tank, cesspools, pour-flush latrine connected to sewer line, several home made latrines, hanging latrines are promoting in the abatement of water pollution especially microbial transmission. From this mitigating system Environmental Sustainability Indicator is required to define through it's infrastructure, operation and maintenance on environmental performance basis. First part of study were microbial risk assessment of water supply and sanitation systems through exposure and contamination mapping in an urban community where the untreated waste water is received by the surface water bodies. In this case consequence based individual effects considering simple RA model ( disease identification, identification of consequences, magnitude of consequences and significance of the severity etc) were used which is intensive observational epidemiological concerns focus on critical groups of population (survey based methods). Field survey and baseline & survey period, water quality especially microbial water quality and the ncidence of diareahoeal diseases among the sensitive group of population (under 5 years children) were noted along with vulnerable conditions. Demographic and socio-economic, sociocultural aspects also studied during community survey to support research work and better understanding of the trend of situations and effects. Second part were carried out by details information about the infrastructure of sanitation systems used by the community; inputs and outputs of the defined systems were analyzed and LCA approach were used among others to find out the release of emissions from generation stage of utilized energy at the time of extraction and processing of materials and resources used for build up the infrastructure; also the surplus energy utilization for poor grade of resource extraction and the emissions involvement at the time of that energy production were anticipated. Eco-Indicator 99 were used to estimate the damage especially human heath among three catagories. For both cases DALYs were used as unit. Indeed LCA approach were used for estimating environmental burdens contribution from water supply and sanitation systems of urban community. In this study it was found for health risk reduction the performance of a septic tank(1.284 DALYs) was better than Pour-flush connected with sewer line(1.219 DALYs) and Cesspools(1.043 DALYs). And for increase. of health risk from the materials and resource consumption point of view, the septic tank, Pour-flush connected with sewer line and Cesspools were (0.001 DALYs), (0.028DALYs) and (0.002 DALYs) respectively. Thus low burdens to environment and less health risk sanitation technologies were recommended from the environmental burdens contribution and health risk reduction point of view |
| Year | 2006 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Aramaki, Toshiya; |
| Examination Committee(s) | Shipin, Oleg V ;Thammarat Koottatep |
| Scholarship Donor(s) | Government of Japan and AIT Fellowship ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2006 |