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    Septage treatment using pilot vertical-flow engineered wetlands system

    234719_234719.pdf (866.4Kb)
    Access Status
    Open access
    Authors
    Jong, V.
    Tang, Fu Ee
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Jong, V. and Tang, F.E. 2014. Septage treatment using pilot vertical-flow engineered wetlands system. Pertanika Journal of Science and Technology. 22 (2): pp. 613-625.
    Source Title
    Pertanika Journal of Science and Technology
    ISSN
    0128-7680
    School
    Curtin Sarawak
    Remarks

    Copyright © 2014 Universiti Putra Malaysia Press. Reproduced with permission.

    URI
    http://hdl.handle.net/20.500.11937/46255
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents a two-staged, pilot-scale vertical flow engineered wetland-based septage treatment system (VFEWs), which was designed and constructed in Curtin University Sarawak Campus to determine the system efficiency in treatment of septage. The treatment system consists of storage tanks, vertical flow wetlands, and a network of influent and effluent distribution pipes. The first stage of the VFEWs treatment system consists of three vertical flow wetlands placed in parallel to provide pre-treatment to raw septage to reduce solids and organic matters mainly by physical filtration and sedimentation processes. The percolate from the first stage is then further treated in the second stage, with four vertical flow wetlands, each with variation in operational regime and substrate (filter) type. The influences of various system and application-related parameters such as substrate material, presence of plants and plant types, and septage feeding practices (solid loading rate (SLR), batch and intermittent loading, and frequency of daily feeding) on pollutant removal efficiency were studied. Results from the first stage wetlands indicate that the removal of total solids and organic matter (BOD and COD) from the raw septage is promising (> 80%) at both SLR of 100 kg TS/m2.yr and 250 kg TS/m2.yr, respectively. However, a higher SLR decreased the average NH3-N removal efficiency. The findings on bed clogging assessment during the study period are also presented in this paper. Validation and expansion of these results are carried outwith ongoing assessments on the system performance.

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