Abstract:
Wastewater generated from different sources due to human activities. Industries are a major
source of pollution in all environments. The majority of brewery industries discharge their
wastewater into nearby water bodies and open land with little or no prior treatment. Also, the
available methods of treatment are not economical and have high negative impact. So, for
the treatment of brewery wastewater, an electrocoagulation process was used. Because the
electrocoagulation process was simple technology was needed. The performance of the
electrocoagulation process alone and bio-coagulant-assisted electrocoagulation was studied,
as was the effect of operating parameters such as pH, time, current, and bio-coagulant
dosage. A constant amount of electrolytes was used for all experiments to minimize power
consumption. The trial runs and findings were planned using the response surface
methodology based on central composite design. The electrocoagulation process alone
removed COD (97.54%), BOD (97.51%), TDS (94.29%), Color (99.29%), Phosphates
(94.69%), and power consumed (0.79kwh/m3
) at an ideal pH of 7, a current of 0.5 Ampere, a
time of 40 minutes and constant 0.75 g/l NaCL as electrolytes for all. When the bio-coagulant
assisted electrocoagulation process method removed more COD (99.01%), BOD (99.09%),
TDS (99.02%), Color (99.63%), Phosphates (97.84%), and power consumed (0.54kwh/m3
).
This implies that the bio-coagulant assisted electrocoagulation process maximizes the removal
efficiency and minimizes power consumption. These results were obtained at an ideal pH of 7,
a current of 0.5 amperes, 2 g/L of custard seed powder as bio coagulant dosage, time of 40
minutes and constant 0.75 g/l NaCL as electrolytes for all. Also, verification experiments were
performed under optimal conditions. Generally, In removing pollutants from brewery
wastewater, indigenous bio-coagulant-assisted electrocoagulation processes were more
effective than electrocoagulation processes alone. Analyses of variance (ANOVA) with 95
percent confidence limits were used to determine the significance of independent variables
and their interactions. As a result, indigenous bio coagulant-assisted treatment techniques
have been shown to be effective treatment techniques for the removal of pollutants from
brewery wastewater.
