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Utilization of Poly Inorganic Coagulants Impregnated with Activated Silica Derived from Rice Husk Ash in Treatment of Grey Water |
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PP: 13-23 |
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Author(s) |
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F.M.Mohamed,
K.A. Alfalous,
M. El Gamal,
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Abstract |
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| The sanitation in Egypt, especially rural areas that have been a critical irritant should be faced. In the near future, this problem is predicted to expand with the increase of population and excessive use of drinking water. Accordingly, the research group decided to adopt the problem of sanitation in village regions to find the appropriate scientific solution from an environmental and economic point of view.
The work aims to treat of the grey water through removing suspended matters (TSS) and degradable and non-degradable organic materials (COD &BOD) by two stages, 1st stage; utilization coagulants such as, poly aluminum chloride silicate (PACSi), poly aluminum hydroxy sulphate silicate (PAHSSi), poly ferric chloride silicate (PFeClSi), and poly aluminum ferric chloride silicate (PAlFeClSi) through coagulation/flocculation/sedimentation and filtration steps. From the results of a grey water treatment using PAlFeClSi, the maximum removals of TSS, COD and BOD are 94.2, 89.2, and 76.9% respectively. PAlFeClSi is the superior poly inorganic coagulant copolymer may be assigned to the co-polymers of Si4+, Al3+and Fe3+. Therefore, the developed rice husk ash poly inorganic co-agulants (PAlFeClSi) is considered as a better replacement technology for grey water treatment due to low cost and high efficacy in this application.
2nd stage: column system through anthracite bed, with adsorption capacity (Ct/Co = 50 % or Q 0.5 ) was 16.625 mg the column recycled at least five times and only was 5 ml of HCl (1M) for each regeneration and no loss in sorbent mass per cycle should be considered.
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