الفهرس 
COVEROnly 14 pages are availabe for public view
 |  | from | 192 |  |  |
| | | from | 192 | | |
Abstract
The increase of waste water environmental problems in Egypt rural areas with the high cost of traditional treatment, led to try new low cost treatment techniques to get high efficiency and low cost. One of these techniques is the Upflow Septic tank/Baffled Reactor (USBR) that achieves removal efficiency from 80 to 85% for all parameters developed by a research team from Faculty of Engineering, Ain Shams University.
The study had used the effective microorganisms to improve the SBR removal efficiency. It was developed and tested at pilot scale for twenty-two months in El Berka sewage treatment plant where was studying the impact of adding EM by adding a different doses (0.5-4) g/l in order to determine the optimum dose which raise the efficiency.
The system has demonstrated satisfactory removal results even at high wastewater strength that when EM addition applied at second part of the unit, the overall removal ratios were 96%, 93.5% and 90.9% for CODtot., BOD5 and T.S.S respectively.
The optimum mixing ratio (dose) of EM which gets the maximum removal efficiency was 3 g/l this dose enhanced the system stability under variable inlet load and accelerated the reaching to the steady state.
The study recommended that system is suitable to be applied for the small communities with small sewage flow and the private separate housings to get optimal benefits from this system.