Treatment of 1,2,4 -Acid Wastewater Combined Flocculation with Adsorption ProcessReport as inadecuate




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This article studied the treatment process of 1,2,4- acid wastewater that came from 6-nitrly produce process. The article mainly combined flocculation with adsorption process to treat with 1,2,4- acid waste water. The flocculation experiment used dicyandiamide formaldehyde as the flocculant; The adsorption experiment, organic bentonite being as adsorbent, AEO-9 surfactant as modifier. The results showed that: used dicyandiamide formaldehyde as the flocculant, the optic flocculation conditions was: the wastewater pH value for 3, flocculants to waste water at the ratio of 1%, stirred quickly for 2 min and slowly for 10 min at 70 ℃, standing for 40 min. COD removal rate reached 83.7%,The COD Surplus 2240mg-L; organic bentonite being as adsorbent, the optic adsorption conditions was: the wastewater pH value for 8, adsorption time 30 min, the dosage of adsorption was 5%,at room temperature, COD removal rate reached 73.81%, The COD Surplus 3599mg-L.The process that adsorption after flocculation have more wastewater treat effectiveness than the flocculation process after adsorption process. The total COD removal rate reached 98.16%, wastewater COD reduce from 13742mg-L to 253mg-L.The process had done a useful attempt to treat 1,2,4- acid wastewater.

KEYWORDS

6-nitrly wastewater; dicyandiamide formaldehyde ;Flocculation; AEO-9; organic bentonite; Adsorption; 1, 2, 4-acid; naphthalenesulfonic acid

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Author: Jinhai Yuan

Source: http://www.scirp.org/



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