Physico-chemical treatment applied to compost liquor: Feasibility study

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• 作者：Jé ; ré ; my Gagnaire^a ; ^b ; Laurent Chapon^b ; Philippe Moulin^a ; Benoî ; t Marrot^a ; ^{benoit.marrot@univ-amu.fr}
• 关键词：Compost liquor ; Reverse osmosis ; Lime precipitation ; Rotary drum vacuum filter ; Lab and semi-industrial scales
• 刊名：Journal of Industrial and Engineering Chemistry
• 出版年：2012
• 出版时间：25 July, 2012
• 年：2012
• 卷：18
• 期：4
• 页码：1522-1528
• 全文大小：564 K

文摘

Compost liquor was treated using a combination of physico-chemical processes: (i) lime precipitation, (ii) filtration on a rotary drum vacuum precoat filter, (iii) ultrafiltration, and (iv) reverse osmosis. Laboratory Jar tests showed the interest of using lime to precipitate compost liquor. Yields of ammonium removal up to 90 % were obtained for an optimum lime concentration of 6 g L^?. A test was run at semi-industrial scale on 400 L of highly loaded compost liquor (COD: 15,800 mg L^?, ammoniacal pollution: 18,433 mg NH₄⁺-N L^?, conductivity: 74,000 ¦ÌS cm^?) to demonstrate the potential of the treatment process proposed. Outstanding purification yields were obtained, especially 95 % of COD removal and 93 % of ammoniacal pollution removal.