Short communication Calculation and interpretation of effluent discharge objectives of dairy industry: Case Edough’s dairy – Annaba (Algeria) Lamine Sayad a , Houria Kherici-Bousnoubra a , Nadjib Drouiche b, *, Moussa Houhamdi c , Nacer Kherici d a Laboratory of Soil and Hydraulics, Faculty of Engineer Sciences, Badji Mokhtar University, Annaba, Algeria b Centre de Recherche en Technologie des Semi-Conducteurs Pour l’Energétique (CRTSE), 2, Bd Dr. Frantz Fanon, P.O. Box 140, 7 merveilles, Alger 16038, Algeria c Department of Nature and Life Sciences, University of Guelma, Algeria d Laboratory of Geology, Faculty of Earth Sciences, Badji Mokhtar University, Annaba, Algeria A R T I C L E I N F O Article history: Received 25 April 2014 Received in revised form 18 August 2014 Accepted 13 September 2014 Available online xxx Keywords: Algeria Dairy discharge EDO calculation Seybouse wadi Watershed A B S T R A C T Aquatic environment owns vary from depend on using and hydrodynamic conditions vulnerabilities. The contribution of water effluent can profoundly affect the physico-chemical composition of the receiving environment. These changes are strongly related to the hydrological regime of rivers. In order to limit the burden and concentrations of contaminants in the receiving environment, several methods have been developed. Regarding to this study, it focuses on agro food waste (dairy) in a natural receiving environment (Seybouse wadi, Algeria NE). In earlier study (2011–2012), physico-chemical and organic analyses have been used by using the calculation method (EOD) to undermine the protection of the receiving environment. Based on release of environmental objectives calculation of each quality criteria and water use showed major overtaking conventional chemical contaminants studied causing an immediate threat to health and or the environment. ã 2014 Elsevier B.V. All rights reserved. 1. Introduction The environmental impact of the dairy industry is directly having high impact on water resources. Large amount of wastewater discharge from this industry is loaded with strong pollutants, such as variable pH and high concentration of organic substance (Castillo De Campins, 2005; Pattnaik et al., 2008; Suthar, 2012). The discharged effluents by a dairy have a high PH as well as strong biochemical oxygen demand as a result of detergents and milk. The associated chemical oxygen demand have a sequence of various tons by year for the same site and furthers the proliferation of algae, that work prevent the oxygen to dissolve and cause damages at the level of the fishes’ natural habitat. The treatment of these effluents by a filtration station at activated sludge is frequently used (Ramasamy et al., 2004; Castillo De Campins, 2005; Djelal et al., 2009) in action of the biodegradability of the effluent. The presence of detergents and disinfectants do not inhibit the development of bacteria of Activated sludge (Janczu- kowicz et al., 2008). The dairy industry of Edough is a public company of whose capital is released actually by IGPM Group (Industrial Group of Milk Production), the social headquarters for instance of produc- tion plant is situated in El Bouni on the national road no. 4–5 km of Annaba city, it is located on ground of 6 ha, of which 1.692 ha built-up/developed surface and 3.308 non developed surface. The manufactured products are: partially pasteurized and skimmed milk, fermented milk (ELBEN) in polyéthyléne packets and Camembert cheese (Saint Augustin brand). In the shape of a rounded box of 250.0001/j. The milk bucket production consume and throw out or reject an enormous quantity of water. Nevertheless, we know that we generally 3.6 L of used water for the production of one liter of milk (Sachon, 1980). The great part of these waters (85%) is discharged as waste water. For the dairy industry, these amounts of water are channeled in concrete pipes of 1.20 m diameter and 2 km length towards Seybouse Wadi without any preliminary treatment where it is necessary to treat these discharges to preserve the receiver’s natural habitat (National Action Plan for Environment and durable Development. And the plan of environmental performance of landscaping * Corresponding author. Tel.: +213 21433511; fax: +213 21 433511. E-mail address: nadjibdrouiche@yahoo.fr (N. Drouiche). http://dx.doi.org/10.1016/j.ecoleng.2014.09.050 0925-8574/ ã 2014 Elsevier B.V. All rights reserved. Ecological Engineering 73 (2014) 421–424 Contents lists available at ScienceDirect Ecological Engineering journal homepage: www.else vie r.com/locat e/e coleng