科研之友
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摘要
The treatment of residual effluent from the food industry was analyzed using microfiltration membranes with a view to its subsequent reuse The most notable characteristics of the effluent were its high DQO, suspended solids and brown coloration The effluent was pretreated biologically in a pilot plant of the CIRA At the end of these processes, the effluent showed a markedly lower DQO, with some residues of organic matter and a high salt content Effluent coloration was blue-green, with an average maximum absorbance of 0 35 at 628 nm This coloration was identified as Blue 1, a synthetic commercial pigment, and traces from an unidentified chromophore group This treated water effluent underwent further treatment with microfiltration to propound its reuse m the industry Microfiltration experiments were carried out using two ceramic membranes of titanium oxide and zirconium oxide with cut-offs of 300 and 150 kDa The effect of transmembrane pressure on its capacity to remove Blue 1 was evaluated for each one Operation times were varied m order to analyze the periods during which the permeate flow reached a constant value The two membranes were efficient in the two processes, nevertheless, the best results in water quality were obtained using the membrane of 150 kDa up to 98 % of the pigment was removed and other optimal characteristics for its reuse were observed
- 出版日期2009-11
