English

 

Name of the Student : Nour Al-huda Al- Hindi
Name of the supervisor/s :

Dr. Nidal Mahmoud

Title of the thesis :

Community Onsite Anaerobic Sewage Treatment In Hybrid and UASB-Septic Tank Systems in Palestine

Abstract :  

In countries like Palestine, where water is scarce and wastewater is dumped untreated to the environment, it is very important to develop low cost onsite sanitation systems in order to reduce the cost of the treatment process and to maximize the reuse of the treated effluent. The acquired knowledge and developed environmentally sound and financially feasible onsite wastewater treatment technologies are especially proper for application in Palestine, but will have general value and applicability in the worldwide.

This research consists of two parts, the first one is the UASB-septic tank performance in the long run, he second part is comparing the performance of the UASB-septic tank and the AH reactors. For the first part an onsite pilot scale UASB-septic tank reactor was monitored at Al-Bireh wastewater treatment plant in Palestine treating domestic sewerage under HRT of two days. The UASB- septic tank was operated for extra 45 days after the first year at ambient temperature fluctuates between 8 to 27°C with an average value 17.3 (5.4) °C. The wastewater in the study area is classified as (high strength) regarding to Metcalf and Eddy (1991) with average CODtot concentration of 1062 mg/l with (COD/BOD5) of 2.13 .The performance data obtained during operation of the reactor for the 45 days showed average removal efficiencies for CODtot, CODss, CODcol, CODdis of 72%, 82%, 58%, 55% respectively. Removal efficiency for BOD5 was 68% and for TS the average removal efficiency 34%. For the second part of this research the UASB-septic tank and the hybrid UASB were operated at 2 days HRT in parallel achieved average removal efficiency of CODtot 52% and 56% for BOD5. The results showed that both systems have achieved the same nutrients removal efficiencies.