Limits of Physicochemical Treatment of Wastewater in the Vegetable Oil Refining Industry
نویسنده
چکیده
This paper presents results of investigations on physicochemical treatment of vegetable oil refinery wastewater (VORW), namely acid and technological wastewater. The study has shown that VORW has a varying high pollution load (organic matter, sulfates, phosphates and chlorides) and the removal of these pollutants from acid wastewater was more effective than that from technological wastewater; the removal of suspended solids and solvent extractables was relatively higher than that of BOD5 and COD. The use of calcium chloride and alum as coagulants increases the concentration of chlorides in the final treated wastewater. The results also showed that physicochemical treatment processes significantly influence the relative biodegradability of the organic matter in the wastewater.
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