Assessment of River Nile water quality and efficiency of some drinking water treatment plants in Cairo area
Nashwa Hamdy Ashmawy;
Abstract
5-1 .Survey for river Nile water Samples
Were collected from 5 different sites (Intake and outlet of, Maadi, Rod El-Farag El RodaEmbaba and Subra DWTPs).
5-2-The Survey of River Nile water indicated:
1- Normal conditions intake for physico-chemical organic parameters Total dissolved solids and all cations and anions were within the acceptable limits.Average concentration of total hydrocarbons in River Nile water ranged between 1.23 – 10.4 µg/L maximum concentration level of total hydrocarbon was recorded in Shubra whereas the lowest concentrations were recorded in the intake of El-Maadi DWTP. Chemical Oxygen demand COD concentration ranged between 24 – 38 mgO2/L and concentration of Biological Oxygen Demand BOD ranged between 8.4 – 15.2 mgO2/L which are considered higher than their concentrations in Law No. 48 /1982 for river Nile water protection which must not exceed 6 and 10 mgO2/L for COD and BOD respectively. This considered an indication for industrial pollution in such areas.
2- In Algae examination , total algal counts, recorded wide variation in sampling dates and that highest values were recorded in the intake of Embaba DWTP while lowest values were recorded in the intake of Rod El-Farag DWTP , the sequence of predominant species of algal counts in River Nile is Diatoms ,green algae and blue green algae. Diatoms considered the predominant species of algal counts in river Nile water since, percent of diatoms ranged between 80.0 – 84.0 %. Diatoms attained their maximum count in the intake of Embaba DWTP while their minimum count in the intake of Rod El-Farag DWTP. Green algae considered the second predominant species of algal counts in river Nile water since, percent of Green algal count ranged between 8.5 – 12.4 %. Green algae attained their minimum count in the intake of Maadi DWTP. While, maximum amount of green algal count of the total algal population was recorded in the intake of Embaba DWTP. Blue green algae considered the least predominant species of algal counts in river Nile water. Blue green algae attained their maximum count in the intake of Shubra DWTP counted 8.9 % of the total algal population while their minimum count in the intake of Rod El-Farag DWTP and amounted to 7.2% of the total algal population.
2- In bacteriological examination Total bacterial counts at 37oC of River Nile samples ranged between 1X 102cfu/mland 9.5 X104cfu/ml, the highest total bacterial counts were observed at inlet of EmbabaDWTP while the lowest counts were observed at inlet of Rod El-Farag DWTP. The highest count of total coliforms was at the inlet of EmbabaDWTP while the lowest counts were observed at inlet of Maadi DWTP. Fecal Coliform counts of River Nile samples, the highest were observed at inlet of Roda while the lowest counts were observed at inlet of Maadi. The highest Fecal Streptococci counts of River Nile samples were observed at inlet of Rodawhile the lowest counts were observed at inlet of Maadi.
Were collected from 5 different sites (Intake and outlet of, Maadi, Rod El-Farag El RodaEmbaba and Subra DWTPs).
5-2-The Survey of River Nile water indicated:
1- Normal conditions intake for physico-chemical organic parameters Total dissolved solids and all cations and anions were within the acceptable limits.Average concentration of total hydrocarbons in River Nile water ranged between 1.23 – 10.4 µg/L maximum concentration level of total hydrocarbon was recorded in Shubra whereas the lowest concentrations were recorded in the intake of El-Maadi DWTP. Chemical Oxygen demand COD concentration ranged between 24 – 38 mgO2/L and concentration of Biological Oxygen Demand BOD ranged between 8.4 – 15.2 mgO2/L which are considered higher than their concentrations in Law No. 48 /1982 for river Nile water protection which must not exceed 6 and 10 mgO2/L for COD and BOD respectively. This considered an indication for industrial pollution in such areas.
2- In Algae examination , total algal counts, recorded wide variation in sampling dates and that highest values were recorded in the intake of Embaba DWTP while lowest values were recorded in the intake of Rod El-Farag DWTP , the sequence of predominant species of algal counts in River Nile is Diatoms ,green algae and blue green algae. Diatoms considered the predominant species of algal counts in river Nile water since, percent of diatoms ranged between 80.0 – 84.0 %. Diatoms attained their maximum count in the intake of Embaba DWTP while their minimum count in the intake of Rod El-Farag DWTP. Green algae considered the second predominant species of algal counts in river Nile water since, percent of Green algal count ranged between 8.5 – 12.4 %. Green algae attained their minimum count in the intake of Maadi DWTP. While, maximum amount of green algal count of the total algal population was recorded in the intake of Embaba DWTP. Blue green algae considered the least predominant species of algal counts in river Nile water. Blue green algae attained their maximum count in the intake of Shubra DWTP counted 8.9 % of the total algal population while their minimum count in the intake of Rod El-Farag DWTP and amounted to 7.2% of the total algal population.
2- In bacteriological examination Total bacterial counts at 37oC of River Nile samples ranged between 1X 102cfu/mland 9.5 X104cfu/ml, the highest total bacterial counts were observed at inlet of EmbabaDWTP while the lowest counts were observed at inlet of Rod El-Farag DWTP. The highest count of total coliforms was at the inlet of EmbabaDWTP while the lowest counts were observed at inlet of Maadi DWTP. Fecal Coliform counts of River Nile samples, the highest were observed at inlet of Roda while the lowest counts were observed at inlet of Maadi. The highest Fecal Streptococci counts of River Nile samples were observed at inlet of Rodawhile the lowest counts were observed at inlet of Maadi.
Other data
| Title | Assessment of River Nile water quality and efficiency of some drinking water treatment plants in Cairo area | Other Titles | تقيم نوعية مياه نهر النيل وتحديد كفاءة بعض محطات معالجة مياه الشرب في القاهرة | Authors | Nashwa Hamdy Ashmawy | Issue Date | 2015 |
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