TY - JOUR
T1 - Retention of E. coli on Natural Pozzolan Beds
AU - Guifo Joseph, Kayem AU - Ahmed, Ali AU - Leopold, Tatsadjieu AU - Ndi Laura, Mbundapong AU - Koungou Sylvere, Ndi
JO - Journal of Engineering and Applied Sciences
VL - 5
IS - 6
SP - 430
EP - 434
PY - 2010
DA - 2001/08/19
SN - 1816-949x
DO - jeasci.2010.430.434
UR - https://makhillpublications.co/view-article.php?doi=jeasci.2010.430.434
KW - water treatment
KW -aluminium sulphate
KW -deep bed filtration
KW -pozzolan
KW -E. coli
KW -diseases
AB - Micro organisms are wide spread in nature and when found in drinking water are known to be major precursors of many diseases. Their removal can be achieved through filtration in packed columns, thus reducing the amount of chemicals used for the disinfection of drinking water. Pozzolan from Djoungo (Cameroon) was tested as a potential filtration media for removing E. coli, the indicator of faecal contamination in ground and surface waters. Filtration experiments were carried out at room temperature (24±2°C) and microbial concentration was determined by the spread plate technique. Filtration tests were performed on 2 granular size media (450 and 900 μm mean size) at constant velocity (0.22 m h-1), at different pH (5-9) and ionic strengths (10-4-10-2 M). The aluminium sulphate concentration of 2.5 mg L-1 was used while the microbial concentration was fixed at 1.46x102 cells mL-1. Results showed that the best microbial retention was obtained at pH 5 and at a high ionic strength of 10-2 M KCl with coagulant dose (2.5 mg L-1). The 450 μm mean diameter media presented a better efficiency compared to the coarse one.
ER -