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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 828 pages |
| ISBN: | 978-0-9879917-0-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Anaerobic-aerobic integrated treatment of effluents generated of the process of extraction of chitin and chitosan from crab waste
Francisco Javier Almendariz Tapia1; MARIA TERESA CERTUCHA2; Onofre Monge1;1UNIVERSIDAD DE SONORA, Hermosillo, Mexico; 2UNIVERSIDAD DE SONORA, HERMOSILLO, Mexico;
Type of Paper: Regular
Id Paper: 538
Topic: 4
Abstract:
This paper presents the treatment of effluents generated in the process of obtaining chitin and chitosan from crab waste. This treatment was conducted in two sequential stages: the first stage consists of an anoxic denitrifying reactor and the second stage is a nitrifying aerobic reactor packed with zeolite. In the denitrifying stage, the load rate was 1952 mgCOD/L•d and 1219 mgNO3-/L•d. Removal efficiencies were obtained as 81% of organic matter and 74% of nitrogen, while the N-protein from the influent was converted to ammonium with a production of 117mgNH4+/L•d. In the second stage, the effluent from the first reactor was fed to the nitrification phase with loads rates of 664 mgCOD/L•d and 234 mgNH4+/L•d. During this stage the ammonium was completely oxidized to nitrate producing 865mgNO3/L•d and the organic matter was removed by 27%. The overall efficiencies from the sequential steps were more than 80% for the organic matter, 74% for the N-nitrate and 100% for the N-ammonium. These results demonstrate that the effluent from the waste of the crustaceans processing industry can be treated biologically to be reused in the process.