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  • Sewage treatment by vermifiltration with synchronous treatment of sludge by earthworms: a low-cost sustainable technology over conventional systems with potential for decentralization

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    55348_1.pdf (540.9Kb)
    Author(s)
    Sinha, Rajiv
    Bharambe, Gokul
    Chaudhari, Uday
    Griffith University Author(s)
    Sinha, Rajiv K.
    Chaudhari, Uday
    Bharambe, Gokul R.
    Year published
    2008
    Metadata
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    Abstract
    Earthworms' body works as a 'biofilter' and they have been found to remove the 5 days' BOD (BOD5) by over 90%, COD by 80-90%, total dissolved solids (TDS) by 90-92%, and the total suspended solids (TSS) by 90-95% from wastewater by the general mechanism of 'ingestion' and biodegradation of organic wastes, heavy metals, and solids from wastewater and also by their 'absorption' through body walls. Earthworms increase the hydraulic conductivity and natural aeration by granulating the clay particles. They also grind the silt and sand particles, increasing the total specific surface area, which enhances the ability to 'adsorb' ...
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    Earthworms' body works as a 'biofilter' and they have been found to remove the 5 days' BOD (BOD5) by over 90%, COD by 80-90%, total dissolved solids (TDS) by 90-92%, and the total suspended solids (TSS) by 90-95% from wastewater by the general mechanism of 'ingestion' and biodegradation of organic wastes, heavy metals, and solids from wastewater and also by their 'absorption' through body walls. Earthworms increase the hydraulic conductivity and natural aeration by granulating the clay particles. They also grind the silt and sand particles, increasing the total specific surface area, which enhances the ability to 'adsorb' the organics and inorganic from the wastewater. Intensification of soil processes and aeration by the earthworms enable the soil stabilization and filtration system to become effective and smaller in size. Suspended solids are trapped on top of the vermifilter and processed by earthworms and fed to the soil microbes immobilized in the vermifilter. There is no sludge formation in the process which requires additional expenditure on landfill disposal. This is also an odor-free process and the resulting vermifiltered water is clean and disinfected enough to be reused for farm irrigation and in parks and gardens.
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    Journal Title
    The environmentalist: the international journal for all environmental professionals
    Volume
    28
    Issue
    4
    DOI
    https://doi.org/10.1007/s10669-008-9162-8
    Copyright Statement
    © 2008 Springer Netherlands. This is an electronic version of an article published in The Environmentalist [Volume 28, Number 4, 409-420. The Environmentalist is available online at: http://www.springerlink.com/ with the open URL of your article.
    Subject
    Environmental Sciences
    Studies in Human Society
    Publication URI
    http://hdl.handle.net/10072/23488
    Collection
    • Journal articles

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