| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 149327 | Chemical Engineering Journal | 2012 | 12 Pages |
Experimental investigations were carried out on a new membrane-integrated hybrid treatment scheme for removal of hazardous cyanide and phenol from coke wastewater and chemical precipitation of ammonia as a value-added struvite by-product. Fenton’s pre-treatment with response surface optimization ensured very effective removal of cyanide and phenol facilitating subsequent chemical precipitation of over 98% ammonia as pure struvite fertilizer. Integration of micro and nano-membrane filtration with these chemical treatment units raised water quality to reusable level. Largely fouling-free flat sheet cross flow membrane modules could remove over 96–98% of the chemical contaminants while still yielding a high flux of 116 l/h/sq m of the membrane surface at a transmembrane pressure of only 15–16 bars. The new integrated scheme embracing the concept of zero emission and value addition is a novel approach in continuous treatment of industrial wastewater for recycling.
► Optimization of Fenton’s process done by response surface methodology (RSM). ► 98% recovery of ammonia as struvite fertilizer achieved in chemical precipitation. ► Integration of flat sheet cross flow membrane modules turned water reusable. ► Novel approach produced struvite free from cyanide and phenol contamination.
