Brewery Effluent Treatment with Conventional and Natural Coagulants

In water scarce countries such as Eritrea, maintaining brewery industry remain ever challenging task. Currently, Asmara breweries is the only beer producing factory consuming 8.46 L of per every produced which notably higher than Brewer’s Association (BA) benchmark and consequently generates 7.53 wastewater/L beer. Bottle cleaning activities ascertain ample effluent bases. Wastewater from bottle (BCWW), (BWW) mixed (MWW) have attributed a wide spectrum 3500-160000 mg/L COD 327-26667 BOD<sub>5</sub>, are significantly overtops other reported effluents. Physicochemical treatments including coagulation with conventional (alum) natural (MO seed) flocculants tested to remove BOD<sub>5 </sub>concentrations Optimal coagulant dosage determined by accounting turbidity key performance indicator. Alum treatment BCWW MO seed flocculation MWW resulted in lower levels 0.49 6.17 NTU at 60 dosages respectively. The optimal quantities 92.2 % 86.6% (by weight) recovered alum Higher sludge volumes recorded major disadvantage whereas coagulant, manifested competitive results removal COD, Chlorine, Nitrogen, Sulphate, Sodium, TDS TSS along P<sup>H</sup> stabilization. addition, 97.2% influent removed through treatment, an equipollent despite four fold increment potassium levels.