Remediation of Wastewater From Paper Mill Industry by Ultrafiltration and Aerated Lagoon

4 Abstract: Paper mill industries produce large quantities of wastewater containing large amounts of organic matter. This study has allowed characterizing ultrafiltration by the organic mat ter in t he effluent at each level of the production l ine and treatment with a erated l agoons to m easure its effectiveness and cons ider the advantages of treatment with membrane reactor for environmental protection receiver. Chemical oxygen demand (COD), d issolved organic carbon (DOC), sp ecificur a bsorbance(SUVA index), absorbance, ra tio absorbance 465 /Absorbance 665 (E4/E6) wer e us ed f or t his purpose. It was shown that COD load ranges between 925 (D1) t o 3355 mgO2/L ( EOP). The low biodegradability of waste paper was pointed out by th v alues of the ratio C OD/DBO5 whi ch were 8. 2, 7.9 and 3.8, resp ectively for e xit laundering samples DO, EOP, D1. From the SUVA index and the ratio E4/E6, it was noted the aromatic and humic character of organic compounds in the effluent. While applying the ultrafiltration, the removal rate of organic matter increased when the membrane pore diameter d ecreased. B etween 0.45 mm and 30 Kda, t he removal ra te was relatively low except for D O and P rimary treatment entennce (ED) samples. Between 1 and 30 K da, a H igh elimination w as o bserved since it reached almost 95% at 1 kDa fo r E D and DO samples.