Design of an anaerobic baffle reactor for abattoir wastewater treatment : case study : Tororo abaitoir.

Abstract

Consumption of contaminated water with pollutants is the major source of sanitation related diseases, most of these diseases can be eliminated by improving the quality of wastewater flowing into our streams and other waterways. The primary consideration should be how to eliminate any sort of contact between the people and the untreated waste water or any contaminated; water. The objective of this .design research project was to' come up with an effective. abattoir wastewater treatment system using ABR before the water is disposed into the waterways/environment. The proposed system is composed of an ABR. ABR is a high rate anaerobic bioreactor having several compartments. This design promotes spatial separation of acidogenesis and methanogenesis phases longitudinally down the reactor. This makes the reactor very effective in BOD removal and solids retention. The design was done for a flow of 3.83m3/d and the volume and the ABR were found to be 16m3 with 5 compartments with the first chamber having length of 2.5m and act as sedimentation zone and the rest each 1m long (1m for up flow chamber and 0.5m for down flow shaft) width of 1m and depth of 2m. The measurements of the open trapezoidal channel were found to be 0.96m deep and O.57m bottom width. The wastewater flows at a height of 0.49m and 'a freeboard of O.47m were obtained. The treatment system reduces the BOD from 936.25mg/L to about 97.25mg/L N from about 171.05mg/L to 100mg/L