Using a peat media for laundry greywater filtration: geochemical and water quality check

Chan, Chee Ming and Norsuhaida, Kamis and Radin Mohamed, Radin Maya Saphira (2014) Using a peat media for laundry greywater filtration: geochemical and water quality check. Middle-East Journal of Scientific Research, 21 (8). pp. 1365-1370. ISSN 1990-9233

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Abstract

Worldwide depletion and pollution of natural water resources have made the recycling of used water a necessity. The level of awareness and sense of urgency to reuse household greywater is relatively high in developed countries with potential water shortage problems, compared to developing nations like Malaysia which enjoys year-round rain and mild droughts. One of the obstacles to the recycling of greywater is the cost for filter installation to treat the discharge prior to reuse. If an effective yet affordable filter is available, the reuse rate would probably increase. The present study introduces peat as a filter media and synthetic greywater prepared from a powder and liquid detergent respectively. The study was conceived with the double-aim of (1) treating the mildly contaminated laundry greywater for non-potable water usage and (2) enhancing stiffness of the peat soil for possible reuse as a sound geo-material. It was postulated that greywater chemistry would alter the geochemical properties of the originally weak, soft peat to form a stronger and stiffer matrix for load-bearing, while the porous peat media would help entrap and cleanse the greywater for safer reuse. The experiments were conducted in an in-house designed reactor, with measurements taken at intervals of 1, 3, 7, 14 and 28 days. The water quality parameters examined for the greywater pre and post-treatment through the peat filter include Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Suspended Solids (SS), Turbidity and pH. The geochemical properties of the peat filter monitored using XRF analysis and 1-dimensional compressibility test. Overall, the results indicate that time plays an important role in the effectiveness of the filtration process, where an aged filter cleanse the greywater better than a newly installed one. The peat soil showed improved compressibility post-treatment, though the effect was considered slight and insufficient to cater for load-bearing purposes.

Item Type:Article
Uncontrolled Keywords:greywater; laundry; peat; filter; geotechnical; chemical
Subjects:T Technology > TD Environmental technology. Sanitary engineering > TD169-171 Environmental protection. Environmental geotechnology
Divisions:Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
ID Code:6195
Deposited By:Dr Radin Maya Saphira Radin Mohamed
Deposited On:10 Nov 2014 16:17
Last Modified:10 Nov 2014 16:17

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