vineet rathore | Indian Institute Of Technology, Roorkee (original) (raw)
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In distilleries after recovery of alcohol, the spent wash left behind is another waste product. I... more In distilleries after recovery of alcohol, the spent wash left behind is another waste product. It is the largest effluent stream from distilleries, the volume of which varies from 14-22 times of the volume of rectified sprit produced. Different biological treatment techniques have been explored for the treatment of distillery wastewater. Besides this various physico-chemical methods, such as adsorption, coagulation and flocculation and oxidation processes, like Fenton's oxidation, ozonation, electrochemical oxidation using various electrodes and electrolytes, nanofiltration, reverse osmosis, ultrasound and different combinations of these methods have also been practiced for the treatment of distillery effluent. But the harmful effects of these chemicals are well known and also, there are studies that indicate that some of synthetic organic polymers, such as acrylamide, have strong neurotoxic and carcinogenic effect. Water treatment method uses Moringa oleifera seeds in the form of a water-soluble extract in suspension, resulting in an effective natural clarification agent for highly turbid and untreated pathogenic surface water. This leads to COD reduction of distillery waste water using Moringa oleifera (Drumstick seeds) as coagulant so that it can be further reused. Coagulation and flocculation processes are used to separate the suspended solids portion from the water or waste water. In the wastewater treatment sequence investigated viz. coagulationflocculation -filtration, the maximum overall removal of 80 -90 % of COD was obtained with this natural coagulant.
Desalination and Water Treatment, 2015
In distilleries after recovery of alcohol, the spent wash left behind is another waste product. I... more In distilleries after recovery of alcohol, the spent wash left behind is another waste product. It is the largest effluent stream from distilleries, the volume of which varies from 14-22 times of the volume of rectified sprit produced. Different biological treatment techniques have been explored for the treatment of distillery wastewater. Besides this various physico-chemical methods, such as adsorption, coagulation and flocculation and oxidation processes, like Fenton's oxidation, ozonation, electrochemical oxidation using various electrodes and electrolytes, nanofiltration, reverse osmosis, ultrasound and different combinations of these methods have also been practiced for the treatment of distillery effluent. But the harmful effects of these chemicals are well known and also, there are studies that indicate that some of synthetic organic polymers, such as acrylamide, have strong neurotoxic and carcinogenic effect. Water treatment method uses Moringa oleifera seeds in the form of a water-soluble extract in suspension, resulting in an effective natural clarification agent for highly turbid and untreated pathogenic surface water. This leads to COD reduction of distillery waste water using Moringa oleifera (Drumstick seeds) as coagulant so that it can be further reused. Coagulation and flocculation processes are used to separate the suspended solids portion from the water or waste water. In the wastewater treatment sequence investigated viz. coagulationflocculation -filtration, the maximum overall removal of 80 -90 % of COD was obtained with this natural coagulant.
Desalination and Water Treatment, 2015