• Login
    • University Home
    • Library Home
    • Lib Catalogue
    • Advance Search
    View Item 
    •   IR@KDU Home
    • INTERNATIONAL RESEARCH CONFERENCE ARTICLES (KDU IRC)
    • 2022 IRC Articles
    • Engineering
    • View Item
    •   IR@KDU Home
    • INTERNATIONAL RESEARCH CONFERENCE ARTICLES (KDU IRC)
    • 2022 IRC Articles
    • Engineering
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Improving Turbidity Removal Efficiency in Slow Sand Filter during the Occurrence of High Turbidity Levels in Surface Water

    Thumbnail
    View/Open
    21.pdf (260.5Kb)
    Date
    2022-09
    Author
    Anoja, N
    Sutharsan, ME
    Sarankan, S
    Metadata
    Show full item record
    Abstract
    Abstract: The prominent drinking water treatment process practised to eliminate turbidity from surface water, especially during high turbidity occurrence in the surface water, is coagulation, sedimentation and rapid sand filtration for many years. However, the possibility of turbidity removal using a slow sand filter (SSF) was not extensively studied in the case of high turbidity occurrence in the surface water. This study aimed to evaluate the performance of SSF in terms of turbidity removal in surface water, when pre-adding poly-aluminium chloride (PACl) as a coagulant chemical along with the pre-treatment by roughing filter. One per cent of PACl is prepared and dosed at the rate of 20 mg/L with raw water into the water intake chamber before it reaches the SSF. The raw and treated water samples were collected every six-hour intervals. The raw water samples whose turbidity level more than 50 NTU were considered and analysed from 174 nos of trails. Turbidity level of raw water and filtered water was observed in the range of 50- 313 NTU and 0.31-5.5 NTU respectively. The turbidity of treated water by SSF was observed to be well below the SLS 614;2013 acceptable limit of 2 NTU in 98.8% of the treated samples. It is observed the turbidity removal efficiency increases when the raw water turbidity level increases. The result shows turbidity of treated water from SSF was complying with the requirement in 98.5% of the trails, which enable the proper function of treatment plant during the high raw water turbidity by complying with SLS 614-2013 when adopting this methodology
    URI
    http://ir.kdu.ac.lk/handle/345/6377
    Collections
    • Engineering [27]

    Library copyright © 2017  General Sir John Kotelawala Defence University, Sri Lanka
    Contact Us | Send Feedback
     

     

    Browse

    All of IR@KDUCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsFacultyDocument TypeThis CollectionBy Issue DateAuthorsTitlesSubjectsFacultyDocument Type

    My Account

    LoginRegister

    Library copyright © 2017  General Sir John Kotelawala Defence University, Sri Lanka
    Contact Us | Send Feedback