Simultaneous nitrate and organic matter removal from a dairy effluent by biodenitrification-Reference-Cited by-同舟云学术

Simultaneous nitrate and organic matter removal from a dairy effluent by biodenitrification

Published:2018-10-03 Issue:2 Volume:31 Page:97-107
ISSN:1718-8598
Container-title:Revue des sciences de l’eau
language:
Short-container-title:rseau

Author:

Hamdani Ahmed¹²³,Mountadar Mohammed³,Assobhei Omar⁴

Affiliation:

1. Laboratory of Marine Biotechnology and Environment (BIOMARE), Faculty of Science, Chouaib Doukkali University, PO Box 20, El Jadida, Morocco, Phone: 212 05 23 34 27 68

2. Department of Life and Earth Sciences (SVT), Regional Center for the professions in Education and Training (CRMEF), Casa/Settat, PO Box 291, Morocco

3. Laboratory of Water and Environment, Faculty of Science, Chouaib Doukkali University, PO Box 20, El Jadida, Morocco

4. Laboratory of Marine Biotechnology and Environment (BIOMARE), Faculty of Science, Chouaib Doukkali University, PO Box 20, El Jadida, Morocco

Abstract

In order to study the simultaneous removal of nitrate and organic matter from a dairy effluent containing 670 mg∙L-1 of nitrate (NO3--N) and 5 760 mg∙L-1 of dissolved chemical oxygen demand (CODd), denitrification in a laboratory scale bioreactor consisting of an immersed bacterial bed colonized by an heterotrophic denitrifying flora (HDF) selected for NO3- reduction, COD consumption and adapted to grow on an effluent produced by a dairy industry was investigated. The obtained results indicated that at the optimal conditions of temperature (30°C), pH (7), COD/NO3--N ratio (5), the operation lasted 108h with total reduction of nitrate in 72h, no nitrite accumulation, and 92% of soluble COD removal in 96h. This indicates that the biodenitrification was accompanied with a high efficiency of matter organic removal as an electron donor, and thereby satisfies the applicable standards.

Publisher

Consortium Erudit

Subject

Water Science and Technology

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