الفهرس 
Nile waterOnly 14 pages are availabe for public view
Abstract
The present study gives reasons of the fouling of anion
exchange resin which leads to reducing the capacity of resin and
treated water quality which cause corrosion in a boiler and turbine and
affect electric production in two of electric power plant in Egypt
Shoubra El-Khiema and Damietta.
The physicochemical results of two electric power plants inlet
River Nile water, filtered water and outlet water of ion exchange resins
revealed that, total organic carbon (TOC) showed low decreased in
filtered water (after treatment) than inlet River Nile water and also
TOC was found in the outlet water of an anion exchange resin. Also,
fouling of organic matter appeared in used anion resin at two electric
power plants, so the problem of anion resin fouling is matched with
quantity of TOC in River Nile and filtered water. Sodium Na+
increased in River Nile than permissible limits at two plants but total
dissolved solid (TDS) increased than permissible limits only at
Damietta River Nile water. Sulphate SO4-2 increased than permissible
limits in two plants filtered water but Sodium Na+ increased than
permissible limits only at Damietta filtered water.
The bacteriological results showed high levels of total coliform
(TC), fecal coliform (FC),fecal streptococci (FS) and Pseudomonas
aeruginosa in inlet River Nile during summer at two plants and
increased of TC in River Nile than permissible limits according to law
48/1982 at Shoubra El-Khiema during spring and summer. The results
showed, high levels of bacterial indicators and heterotrophic plate
count (HPC) in River Nile and decreased in filtered water at two
plants. The mean of electric conductivity of outlet water of mixed bed
increased than permissible limits of two plants.
New (storage) and used anion resins were contaminated with
microorganisms. All bacteria isolated from two plants anion resin were gram positive. Epifluorescence and scan electron microscope
(SEM) photomicrographs of the fouled resin beads clearly show
microbial fouling by bacteria and viable and dead microbial biofilm.
Three isolates of bacteria from Shoubra El-Khiema anion resin
were identified that were two of Bacillus sp. and Brevebacterium sp.
and two isolates of fungal species which were Penicillium sp. and
Fusarium sp. While in Damietta anion resin five isolates of bacteria
were identified that were Bacillus spp. and four fungal species which
were microscopically identified as Aspergillus flavus, Aspergillus
niger, Alternaria sp. and Penicillium sp.
Shoubra El-Khiema and Damietta anion exchange resins were
fouling by microbial, organic matter and iron leading to decline of the
total exchange capacity of anion resin but it still within the acceptable
limits at Shoubra El-Khiema but lower than acceptable limits at
Damietta electric power plant.
Key Words: River Nile, filtered water, ion exchange resin,
physicochemical & bacteriological parameters.