| Titre : | Chemical Oxygen Demand on on-site effluent | | Type de document : | texte imprimé | | Auteurs : | Claire Laugier ; Robert Moreau, Responsable de stage | | Editeur : | Paris [France] : Ecole Nationale du Génie Rural, des Eaux et des Forêts (ENGREF) | | Année de publication : | 1996 | | Importance : | 52 p., annexes, tableaux, figures | | Catégories : | Autres descripteurs
DCO ; EAU USEE INDUSTRIELLE
Thésaurus Agrovoc
Eau ; Environnement
| | Résumé : | To meet tne new authorisation (from September 1997) for the site effluent discharges, Elf Atochem UK Widnes has to do a great deal to do in order to reduce its load, and its Chemmical Oxygen Demand (COD). A vast investigation on COD is in progress. Part of this programme is to find out which effluent streams produce a high COD, in order to know where the effort must be targeted in order to reduce the current COD levels. We took advantage of the presence of an on-line continuous measurement COD meter for one month on the site to correlate the discharges from the different production areas with the COD. An initial assessment is that the components which concentrations are actually quantified by chromatography and titration account for 25 to 90% if the actual COD with day to day variation. The same percentage is produced by the theoretical Total Organic Carbon (TOC). This means that some unidentified compounds increase the COD ; their identification should be the
next step. Moreover the Total Carbon an Inorganic Carbon analysis shown that inorganic compounds are present at low concentrations. The unidentifed compounds that increase the COD must be inorganic compounds. An attempt to correlate effluent discharges from each plant to that of the total site COD measured prior t o discharge off site was made. The main discharges are, first benzyl cyanide, then Acyl Pit discharges. More than 1/3 of the cases have several discharges at the same time. It seems that the more discharges you get at the same time, the more risk to have a high COD level, even if the ranges are very high (same size to means). | | Type de document : | Mémoire | | Permalien de la notice : | https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=108921 |
Chemical Oxygen Demand on on-site effluent [texte imprimé] / Claire Laugier ; Robert Moreau, Responsable de stage . - Paris (France) : Ecole Nationale du Génie Rural, des Eaux et des Forêts (ENGREF), 1996 . - 52 p., annexes, tableaux, figures. | Catégories : | Autres descripteurs
DCO ; EAU USEE INDUSTRIELLE
Thésaurus Agrovoc
Eau ; Environnement
| | Résumé : | To meet tne new authorisation (from September 1997) for the site effluent discharges, Elf Atochem UK Widnes has to do a great deal to do in order to reduce its load, and its Chemmical Oxygen Demand (COD). A vast investigation on COD is in progress. Part of this programme is to find out which effluent streams produce a high COD, in order to know where the effort must be targeted in order to reduce the current COD levels. We took advantage of the presence of an on-line continuous measurement COD meter for one month on the site to correlate the discharges from the different production areas with the COD. An initial assessment is that the components which concentrations are actually quantified by chromatography and titration account for 25 to 90% if the actual COD with day to day variation. The same percentage is produced by the theoretical Total Organic Carbon (TOC). This means that some unidentified compounds increase the COD ; their identification should be the
next step. Moreover the Total Carbon an Inorganic Carbon analysis shown that inorganic compounds are present at low concentrations. The unidentifed compounds that increase the COD must be inorganic compounds. An attempt to correlate effluent discharges from each plant to that of the total site COD measured prior t o discharge off site was made. The main discharges are, first benzyl cyanide, then Acyl Pit discharges. More than 1/3 of the cases have several discharges at the same time. It seems that the more discharges you get at the same time, the more risk to have a high COD level, even if the ranges are very high (same size to means). | | Type de document : | Mémoire | | Permalien de la notice : | https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=108921 |
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Ajouter le résultat dans votre panier Faire une suggestion Affiner la recherche Interroger des sources externesLes algues au sein d'un lagunage naturel : influence des membranes de filtration sur les paramétres DCO et MES / L. Murat (1996/09)
