Essay Biological Treatment
Biological treatment process of air loaded with an ammonia and hydrogen sulﬁde mixture
Luc Malhautier a,*, Catherine Gracian a, Jean-Claude Roux a, Jean-Louis Fanlo a, Pierre Le Cloirec b a Ecole des Mines d’Als, Laboratoire du Gnie de l’Environnement Industriel, 6, Avenue de Clavires, 30319 Ales Cedex, France e e e b Ecole des Mines de Nantes, Dpartement Systmes Energtiques et Environnement, La Chantrerie, 4, rue Alfred Kastler, e e e BP 30723, 44307 NANTES Cedex 3, France Received 12 June 2001; received in revised form 10 July 2002; accepted 10 July 2002
Abstract The physico-chemical characteristics of granulated sludge lead us to develop its use …show more content…
Keywords: Bioﬁltration; Ammonia; Hydrogen sulﬁde; Biological oxidation; Elimination eﬃciency
1. Introduction Ammonia and hydrogen sulﬁde are emitted into the atmosphere from industries (carcass processing plants, sewage treatment plants, composting works). These emissions, in addition to their own toxicity, constitute a source of olfactory nuisance. More and more, puriﬁcation processes are based on the ability of some microorganisms to oxidize a variety of inorganic and organic
Corresponding author. Fax: +33-466-782701. E-mail address: firstname.lastname@example.org (L. Malhautier).
compounds into mineral end-products (Diks and Ottengraf, 1991). Bioﬁltration as a technique to control air pollution is used mainly for odour removal. In skin manufacture, bioﬁltration treatment of hydrogen sulﬁde reached an elimination eﬃciency of 97%, the contaminated air ﬂow rate was 6000 m3 hÀ1 (Bijl, 1987). Similarly, the treatment of air (20 000 m3 hÀ1 ), coming from oil production manufacture and loaded with hydrogen sulﬁde, using a bioﬁltration unit (340 m3 ) gave an elimination eﬃciency of 89% (Knauf, 1995). Amirhor et al. (1995) studied the treatment, using a bioﬁlter (500 m3 ), of air (40 000 m3 hÀ1 ), coming from a composting work, containing mainly ammonia and reduced