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Abstract

As a result of the urgent need to provide new water sources and benefit from a large amount of wastewater returning, an AnDMBR system was installed and tested in Al-Tira wastewater treatment plant (WWTP) to opt for agriculture reuse under the climatic conditions and sewage characteristics of Palestine.

The process started up on January 1, 2020, and 25 samples were taken during the period July 22, 2020, to October 22, 2020, at ambient temperature 25-36 °C and wastewater temperature 20-30 °C. The characteristics of the WWTP influent were measured and calculated to study the efficiency of the MBR in treating wastewater. The strength classification of the wastewater varied from medium to strong strength based on the Chemical Oxygen Demand (COD) values.

The COD removal efficiency in the MBR system (92%) was better than the UASB reactor (85%) while the WWTP removal efficiency was the best which is 98%. The CODtot values were found near to the acceptable range for irrigation uses. The BOD₅ removal efficiency results showed that the MBR (84%) better than the UASB reactor (69%). The BOD₅ values are higher than the acceptable range (22.33±1.53) might be it is backward to the high value of pH.

The MBR removal efficiency of TSS and VSS were 82% and 84% and showed a higher performance than the UASB efficiency in this study and past studies. The pH value for MBR effluent was 7.6 (0.7) which is within the acceptable range for the irrigation uses (7.4-7.8). The fecal coliform (FC) was 2×10⁵ CFU/100ml for MBR effluent which is near to the value of restricted irrigation (≤ 10⁵ CFU/100ml).

The study concluded the need of improving the AnDMBR system and measuring more parameters to evaluate the performance of the system in treating wastewater and increase the efficiency of the membrane to obtain the study required needs.