Surface water quality susceptibility in drinking water treatment at Dhaka, Bangladesh
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2017, Vol 11, Issue 1
Abstract
Ground water depletion in Dhaka indicates that shifting to a surface water source is now inevitable to continue Dhaka’s public water supply. But indiscriminate pollution of the rivers of Dhaka has made them difficult to treat. Hence study on the evolution of some of the critical quality parameter is carried to understand the occasional problems of odour and aesthetic in the treated surface water in Dhaka. The Sitalakhya River water & Saidabad water treatment plant (SWTP) at Dhaka is the concern of this study. Water samples were collected & tested for a period of four years from 2002 to 2006 mostly in the laboratory of SWTP following standard methods and analyzed. Ammonia levels are found generally below 0.5 mg NH4-N/l in the wet season but rise up to 10 mg NH4-N/l (sometimes more) during the dry season. Other parameters such as BOD, COD, phosphate, hardness, TDS, and conductivity show the same general pattern of variation. BOD reaches levels of 20 mg/l & BOD to COD ratio is between 1.5 and 2.Colour exists in treated water from around 2 TCU to around 15 TCU respectively in dry & wet seasons. Sulfide presence is negligible. The average and max values, both increasing around three mg NH4-N/l every year with a trend signifying that it will continue further. Compared to design criteria of SWTP of max 4 mg NH4-N per litre the increases are substantial. This needs attention both in terms of regulatory measures and of proactive strategies on how to handle the resulting future treatment challenges.
Authors and Affiliations
Md. Serajuddin, Md. Aktarul Islam Chowdhury
Keywords
Related Articles
- EP ID EP39194
- DOI -
- Views 178
- Downloads 0
Assessment of carbon sequestration in species (Salsola laricina and Poa sinaica) under different treatments of vegetation management (Case study: Ghazvin, Iran)
Rangelands comprise the large parts of Iran as a steppic area. Ghazvin, as area index of steppic area, was selected under three sites including long-term exclosure, medium-term exclosure, and grazable area due to the ca...
Comparison of culture, ELISA and LAMP-PCR for diagnosis of Mycobacterium avium subsp. Paratuberculosis
Mycobacterium avium subsp. Paratuberculosis is the etiologic agent of Johne's disease in the cattle. JD is a disease with considerable economic impact on dairy cattle. It is prevalent worldwide, especially in developing...
Evaluation of mycelial growth of oyster mushroom (Pleurotus floridanus Singer) on different media and cereal grains
The oyster mushrooms are cultivated all over the world. It has a high nutritional as well as medicinal value. The present study was carried out to find the best medium for pure culture preparation and best cereal grains...
Diversity and distribution of tree species in the hills of Chittagong Metropolitan Area, Bangladesh
Chittagong City is surrounded by several hills which were abundant with biodiversity but continuously destroying now due to high population pressure and development. To explore current status of species diversity and d...
Electrochemical treatment method in paper recycling industry effluent
This industries in terms of water and, accordingly wastewater production considered as pollutant effluent due to having various kinds of organic and mineral materials. Therefore, in order to pump it to environment or re...