الفهرس 
WASTE WATER TREATMENT
MATERIAL AND METHODSOnly 14 pages are availabe for public view
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Abstract
Wastewater treatment has became one of the important subject taken into consideration in the developing countries, as the most important cause of pollution is discharging wastewater without adequate treatment into watercourses. The big funds and land areas required for the distribution of the use of wastewater treatment in these countries. These reasons led the scientific researches to concentrate on the use of new local products for new modified wastewater treatment techniques suitable for each country conditions. Also, the concentration on minimizing of power consumption, maintenance requirements, complicated techniques and imported equipment became one of the main targets for the ongoing studies. This leads to choose the attached growth system to decrease the required land, minimize the construction and operation cost as possible.
The main objectives of our work were as follows:
• Investigate, determine and study the performance and the change in substrate removal by using the polyethylene sheets.
• Formulate a simplified simulation model for the proposed system.
• Verifying the model.
This study was carried out to determine the applicability and the efficiency for using polyethylene sheets for enhancement wastewater characteristics at the effluent for wastewater treatment plant.
The study had done at Abu Rawash wastewater treatment plant, where the polyethylene strips were placed at the effluent channel for WWTP.
The study ensured the applicability of the polyethylene sheets as cheap technique for enhancement wastewater characteristics. For media type (1) ”Germany smooth polyethylene strips with polystyrene web”, the study resulted removal ratio ranged between 6.28 % - 15.56 % for BOD and 6.56 % - 14.47 % for TSS for one line of media. For media type (2) ”Egyptian smooth polyethylene strips” the study concluded that removal ratio ranged between 3.04 % - 5.16 % for BOD and 3.45 % - 5.83 % for TSS for one line of media. While for two lines of the media removal ratio ranged between 6.15 % - 10.37 % for BOD and 6.14 % - 10.38 % for TSS. And for three lines of the media the removal ratio ranged between 10.52 % - 14.77 % for BOD and 9.20 % - 15.55 % for TSS. For media type (3) ”Egyptian rough polyethylene strips” the study for one line of the media resulted removal ratio ranged between 10.05 % - 19 % for BOD and 10.50 % - 22.97 % for TSS. While for two lines of the media removal ratio ranged between 17.8 % - 33.66 % for BOD and 17.88 % - 36.46 % for TSS. And for three lines of the media the removal ratio ranged between 24.77 % - 47.74 % for BOD and 23.75 % - 51.95 % for TSS.