The Experts below are selected from a list of 27 Experts worldwide ranked by ideXlab platform

P. L. Harris - One of the best experts on this subject based on the ideXlab platform.

  • Indigenous plant based coagulants/disinfectants and sand Filter media for surface water treatment in Bamenda, Cameroon
    African Journal of Biotechnology, 2011
    Co-Authors: K. A. Yongabi, David Lewis, P. L. Harris
    Abstract:

    An Evaluation of plant- based coagulants and disinfectant-sand Filter  medium for surface water treatment in Bamenda, Cameroon using  bacterial analyses and turbidity were carried out. 100L of very turbid surface water (Turbidity approx. 500NTU) was pretreated with 100 seeds of Moringa oleifera, and further Filtered through a sand Filter Drum (120 L carrying capacity) made of fine, coarse sand, charcoal and gravel. The mean total heterotrophic bacterial counts, Escherichia coli, coliform, pseudomonas and yeast counts, as well as turbidity of untreated surface water significantly reduced by 85 to 95%. The results suggested that the mean values of the same parameters for sand Filtered pond water alone was significantly lower than the corresponding mean values obtained for plant coagulant treated surface water. The findings from this study  demonstrates strongly that a biocoagulant sand Filter media (plant based coagulant-sand Filter Drum) could be applied to treat contaminated surface water, rendering it free from solids and pathogens. Key words : Plant, coagulants, indigenous, surface, water, treatment, microbes, Cameroon.

  • Cheap Alternative Biocoagulant-sand Filter System for Water Purification in Low Income Earning Countries
    2010
    Co-Authors: K. A. Yongabi, David Lewis, P. L. Harris
    Abstract:

    A report on an evaluation of an integrated low-tech biocoagulant-sand Filter Drum for household water and waste water purification using bacterial culture tests, total solids, and turbidity amongst others is presented. A hundred litres of very dirty/turbid water (130.3 NTU) was pretreated with 100 seeds of Moringa and further Filtered through a sand Filter Drum (120 litres carrying capacity) made of fine, coarse sand, charcoal and gravel. The mean total aerobic mesophilic bacterial counts, E coli, coliform, pseudomonas, and yeast counts, as well as turbidity of untreated water drastically reduced to WHO acceptable standards for potable water. The results indicated that the meanvalues of the same parameters for sand Filtered pond water alone was significantly lower than the corresponding mean values obtained for Moringatreatedpond water. The findings from this study suggests strongly that an integral of two natural water purification technologies (Biocoagulant-sand Filter Drum)could be a panacea for treatment of all types of contaminated water for potable andnon potable uses.

K. A. Yongabi - One of the best experts on this subject based on the ideXlab platform.

  • Indigenous plant based coagulants/disinfectants and sand Filter media for surface water treatment in Bamenda, Cameroon
    African Journal of Biotechnology, 2011
    Co-Authors: K. A. Yongabi, David Lewis, P. L. Harris
    Abstract:

    An Evaluation of plant- based coagulants and disinfectant-sand Filter  medium for surface water treatment in Bamenda, Cameroon using  bacterial analyses and turbidity were carried out. 100L of very turbid surface water (Turbidity approx. 500NTU) was pretreated with 100 seeds of Moringa oleifera, and further Filtered through a sand Filter Drum (120 L carrying capacity) made of fine, coarse sand, charcoal and gravel. The mean total heterotrophic bacterial counts, Escherichia coli, coliform, pseudomonas and yeast counts, as well as turbidity of untreated surface water significantly reduced by 85 to 95%. The results suggested that the mean values of the same parameters for sand Filtered pond water alone was significantly lower than the corresponding mean values obtained for plant coagulant treated surface water. The findings from this study  demonstrates strongly that a biocoagulant sand Filter media (plant based coagulant-sand Filter Drum) could be applied to treat contaminated surface water, rendering it free from solids and pathogens. Key words : Plant, coagulants, indigenous, surface, water, treatment, microbes, Cameroon.

  • Cheap Alternative Biocoagulant-sand Filter System for Water Purification in Low Income Earning Countries
    2010
    Co-Authors: K. A. Yongabi, David Lewis, P. L. Harris
    Abstract:

    A report on an evaluation of an integrated low-tech biocoagulant-sand Filter Drum for household water and waste water purification using bacterial culture tests, total solids, and turbidity amongst others is presented. A hundred litres of very dirty/turbid water (130.3 NTU) was pretreated with 100 seeds of Moringa and further Filtered through a sand Filter Drum (120 litres carrying capacity) made of fine, coarse sand, charcoal and gravel. The mean total aerobic mesophilic bacterial counts, E coli, coliform, pseudomonas, and yeast counts, as well as turbidity of untreated water drastically reduced to WHO acceptable standards for potable water. The results indicated that the meanvalues of the same parameters for sand Filtered pond water alone was significantly lower than the corresponding mean values obtained for Moringatreatedpond water. The findings from this study suggests strongly that an integral of two natural water purification technologies (Biocoagulant-sand Filter Drum)could be a panacea for treatment of all types of contaminated water for potable andnon potable uses.

Jasmi Nur Farezza - One of the best experts on this subject based on the ideXlab platform.

  • Assimilation of coconut coir pith in slow sand Filter (SSF's) to improve water quality in water treatment plant
    2010
    Co-Authors: Jasmi Nur Farezza
    Abstract:

    During this modern era, the majority of rural communities are still drinking superficial water that does not meet the required standard of quality, causing serious health problems. Filtration is one of the water treatment processes to ensure our drinking water is safe from physical contamination. Therefore, in the study was investigating the potential of slow sand filtration as a biofiltration by adding natural material (coconut coir pith) as a medium to Filter raw water as to reduce turbidity, total suspended solid, heavy metal and presence of pathogen and feacal coliform and also to reduce chemical additive in the disinfection process which is harmful to the communities. The focus of this study is to investigate the effectiveness Slow. Sand Filtration in treating raw water sample taken from JBA at water treatment plant at Semambu. Ten parameters were analyzed which include pH, turbidity, Total Suspended Solids (TSS), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Coliform (TC), Escherichia Coli (E. Coli), Iron (Fe), Cooper (Cu) and Cadmium (Cd). The purpose of this study is to compare the effluent of water sample after treatment with conventional slow sand filtration and with integrated slow sand filtration which has additional coconut coir pith of granular activated carbon (GAC) layer in between of the Filter bed. During this study, two pilot models of Filter Drum is built and the material will be used are wash sand (0.15mm - 0.3mm), gravel sand (2mm-5mm) and coconut coir pith as GAC From the result obtained, all the parameters were analyzed comply with Malaysian Drinking Water Standard 2009 guidelines. From the study, all result is most under range/limit in Malaysian Standard 2009. From the both model analysis, we can conclude that the water are safe be drink based on the small and acceptable limit of presence of heavy metal and the most effective type of filtration is with adding activated carbon in the medium of slow sand filtration tank.

Laura Knoll - One of the best experts on this subject based on the ideXlab platform.

  • A biocoagulant slow sand filtration for disinfection of Toxoplasma gondii oocysts from Mezam River in Bamenda, Cameroon
    African Journal of Biotechnology, 2015
    Co-Authors: Kenneth A. Yongabi, Laura Knoll
    Abstract:

    An integrated low-tech biocoagulant-sand Filter Drum for disinfection of oocysts of Toxoplasma gondii targeted for developing countries was evaluated. Dirty and turbid water (130.3 NTU) from Mezam River and leachates from dump sites and stagnant water in Bamenda, Cameroon, was analyzed microscopically after centrifugation for oocyst of T. gondii . Leachates from dump sites and stagnant water in Bamenda city had a very high concentration of oocyst of T. gondii too numerous to count per 10 ml while the major Mezam River had 50 oocysts per 10 ml. Considering that is widely used for various domestic chores; filtration disinfection of T. gondii was considered. A bench scale disinfection of oocysts of T. gondii with 0.2 g of powdered Moringa oleifera seeds per 10 ml of contaminated water from Mezam River showed a reduction of 50 oocysts per 10 ml to 10 oocysts in 15 min retention time. To optimize this, a pilot scale up was carried out using 120 L (120,000 ml) of water from Mezam River pretreated with 2400 g of powdered M. oleifera seeds for 15 min retention time and Filtered through a sand Filter Drum made of fine sand, coarse sand, charcoal and gravel for 1 h filtration time. The total mean values of oocysts counts for 120 L of water to be Filtered were 600,000 per 120,000 ml. The oocysts counts reduced to 10,000 after pretreatment with 2400 g of powdered seeds of M. oleifera and after a final filtration through a sand Filter Drum, no oocysts of T gondii was detected in the final treated water. The findings from this study suggests strongly that the application of  natural  coagulants and sand filtration systems could serve a simple low cost disinfection for oocysts of T gondii  from water systems in resource limited countries. Key words: Toxoplasma gondii , oocysts, disinfection, water, biocoagulant, moringa, turbidity, sand Filter, Drum, Cameroon.

David Lewis - One of the best experts on this subject based on the ideXlab platform.

  • Indigenous plant based coagulants/disinfectants and sand Filter media for surface water treatment in Bamenda, Cameroon
    African Journal of Biotechnology, 2011
    Co-Authors: K. A. Yongabi, David Lewis, P. L. Harris
    Abstract:

    An Evaluation of plant- based coagulants and disinfectant-sand Filter  medium for surface water treatment in Bamenda, Cameroon using  bacterial analyses and turbidity were carried out. 100L of very turbid surface water (Turbidity approx. 500NTU) was pretreated with 100 seeds of Moringa oleifera, and further Filtered through a sand Filter Drum (120 L carrying capacity) made of fine, coarse sand, charcoal and gravel. The mean total heterotrophic bacterial counts, Escherichia coli, coliform, pseudomonas and yeast counts, as well as turbidity of untreated surface water significantly reduced by 85 to 95%. The results suggested that the mean values of the same parameters for sand Filtered pond water alone was significantly lower than the corresponding mean values obtained for plant coagulant treated surface water. The findings from this study  demonstrates strongly that a biocoagulant sand Filter media (plant based coagulant-sand Filter Drum) could be applied to treat contaminated surface water, rendering it free from solids and pathogens. Key words : Plant, coagulants, indigenous, surface, water, treatment, microbes, Cameroon.

  • Cheap Alternative Biocoagulant-sand Filter System for Water Purification in Low Income Earning Countries
    2010
    Co-Authors: K. A. Yongabi, David Lewis, P. L. Harris
    Abstract:

    A report on an evaluation of an integrated low-tech biocoagulant-sand Filter Drum for household water and waste water purification using bacterial culture tests, total solids, and turbidity amongst others is presented. A hundred litres of very dirty/turbid water (130.3 NTU) was pretreated with 100 seeds of Moringa and further Filtered through a sand Filter Drum (120 litres carrying capacity) made of fine, coarse sand, charcoal and gravel. The mean total aerobic mesophilic bacterial counts, E coli, coliform, pseudomonas, and yeast counts, as well as turbidity of untreated water drastically reduced to WHO acceptable standards for potable water. The results indicated that the meanvalues of the same parameters for sand Filtered pond water alone was significantly lower than the corresponding mean values obtained for Moringatreatedpond water. The findings from this study suggests strongly that an integral of two natural water purification technologies (Biocoagulant-sand Filter Drum)could be a panacea for treatment of all types of contaminated water for potable andnon potable uses.