Assessment of Combined System Up Flow Anaerobic Sludge Blanket and Sequencing Batch Biofilm Reactor (UASB+SBBR) Technology to Treat Dairy Wastewater

Abstract

Biological treatment of dairy wastewater was investigated using Up flow Anaerobic Sludge Blanket reactor followed by Sequencing Batch Biofilm Reactor (UASB+SBBR).The present study were carried out in a laboratory-scale UASB reactor volume (70 L) is a cylindrical shape with the total height 132cm,The effective depth  is 100cm  with diameter 30cm.then, SBBR is a square shape tank volume(70 L) with 40cm length and 40cm width and the effective depth is 44cm.this study aims was included an assessment of an industrial dairy wastewater in Al-Samawa City - Iraq by using combined system. Raw dairy wastewater was fed to the combined system (UASB+SBBR) under different Concentration. Two-month of The  start-up period allowed for biofilm growth on the Kaldnes (K1)  in SBBR and the production of gas from a UASB  in varying quantities indicates its stability, These indicators were to ensure that the regime reached a steady-state. the steady-state  in the combined system that lasted 3 months during the winter. The (UASB+SBBR) was operated through different influent concentrations  and HRT/cycle time of (6,12,18,24)hr. This study was  included daily water analysis for various physic-chemical factors. The results have shown successful applicability of the combined system at HRT/cycle time was 24hr and Flow rate 2.91 L/h,  these value  optimal for simultaneous organics and nutrients removal. The combined system was used to achieve COD, BOD,TN, PO43- and TSS, The recorded of this parameter on  maximum removing ( 96.879% , 95% , 79.4%  81.132%, 93.312%) during the  treatment, respectively .The  maximum biogas production  in UASB was 2.52 L /day at HRT 24hr.