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Treatment of Potato Processing Wastewater with Coagulating and Polymeric Flocculating Agents
Author(s) -
KARIM M. I. A.,
SISTRUNK W. A.
Publication year - 1985
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1985.tb10559.x
Subject(s) - flocculation , wastewater , effluent , turbidity , total suspended solids , chemistry , chemical oxygen demand , suspended solids , pulp and paper industry , total dissolved solids , waste management , environmental science , environmental engineering , organic chemistry , biology , ecology , engineering
Reduction of wastewater strength in abrasive‐peeled, lye‐peeled, and steam‐peeled potato processing wastewater using 4 inorganic salts and 11 polymers was investigated. Treatment of wastewater with 150 mg/ L FeCl 3 6H 2 O + 20 mg/L Purifloc Anionic Polymer #23 aided in coagulation and flocculation of suspended solids of effluent from abrasive‐peeled potatoes including greater than 90% reduction in chemical oxygen demand (COD), total suspended solids (TSS) and turbidity. Treatment with 300 mg/L CaCl 2 + 25 mg/L Purifloc #23 reduced COD and TSS levels in wastewater from lye‐peeled potato by 69% and 76%, respectively. In steam‐peeled effluent, 350 mg/L CaCl 2 + 25 mg/L Nalco 7122 reduced TSS by 90% and COD by 60%. Waste strength of effluent from processing potatoes can be substantially reduced by treating with coagulating and flocculating agents before discharging into municipal or other treatment systems.