A membrane-integrated advanced scheme for treatment of industrial wastewater: Dynamic modeling towards scale up

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• 作者：Ramesh Kumar ; Parimal Pal
• 关键词：Aquatic environment ; Wastewater treatment ; Advanced process ; Mathematical modeling
• 刊名：Chemosphere
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：92
• 期：10
• 页码：1375-1382
• 全文大小：1514 K

文摘

Modeling and simulation was carried out for an advanced membrane-integrated hybrid treatment process that ensures reuse of water with conversion and recovery of ammoniacal nitrogen as value-added struvite fertilizer from coke wastewater. While toxic cyanide was largely removed in a pre-chemical treatment unit using Fenton¡¯s reagents under optimized conditions, more than 95 % of -N could be recovered as a valuable by-product called struvite through addition of appropriate doses of magnesium and phosphate salts. Water could be turned reusable through a polishing treatment by nanofiltration membranes in a largely fouling free membrane module following a biodegradation step. Mathematical modeling of such an integrated process was done with Haldane-Andrew approach for the associated microbial degradation of phenol by Pseudomonas putida. Residual was degraded by nitrification and denitrification following the modified Monod kinetics. The model could successfully predict the plant performance as reflected in reasonably low relative error (0.03-0.18) and high Willmott d-index (>0.98).