Mécanismes d'élimination de l'azote et du phosphore dans un chenal algal à haut rendement

Hafiane, F. El; Rami, A.; Hamouri, B. El

doi:10.7202/705502ar

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…Many authors showed the influence of abiotic physico-chemical parameters on the dynamics of nutrients in the water. Thus, according to Hafiane et al [36], hot weather leads to increased net loss of nitrogen as NH 3 . In the same way, Dovonou et al [37] prove that because NH 4 + proceed from the decomposition of excreta, it pass to gas form and lead to an elevation of pH.…”

Section: Correlations Between Parameters Measured In Situ and Nutrienmentioning

confidence: 99%

Decomposition and Mineralization Effect of Various Sources of Pig Manure on Water Quality and Nutrients Availability for Agro-Fish System in Benin

Bokossa¹,

Saïdou²,

Sossoukpe³

et al. 2014

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In spite of the relevance of current studies on the importance of organic fertilizers such as animal manure in improving the health of ecosystems, little is known about the biochemical mechanisms affecting the availability of nutrients released from the organic fertilizer in water. A litter bag study during 6 weeks was carried out in pots containing 25 liters of water with 15 g of pig dejections as organic fertilizers. The experimental design was a completely randomized block design with three replications. The treatments consisted of dejections of pigs nourished with: recommended diet composition T1, partially improved diet with Azolla filiculoides T2, improved diet with Azolla filiculoides T3, improved diet with cereal bran T4. A control treatment without dejection (T0) was considered in the study for comparison purpose. Four pigs per type of diet were considered leading to 16 white landrace pigs of six months age followed for dejection collections. Strong release of nutrients for better yield for agro-fish system was obtained in the manure T1 with

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Section: Correlations Between Parameters Measured In Situ and Nutrienmentioning

confidence: 99%

Decomposition and Mineralization Effect of Various Sources of Pig Manure on Water Quality and Nutrients Availability for Agro-Fish System in Benin

Bokossa¹,

Saïdou²,

Sossoukpe³

et al. 2014

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“…Nitrogen, mainly in the form of ammonia, is rapidly converted into nitrite (NO 2 − ) and nitrate (NO 3 − ) after oxidation in the presence of heterotrophic bacteria [25]. These bacteria require an anoxic environment and a carbon source to carry out the denitrification process.…”

Section: Physico-chemical and Bacteriological Parametersmentioning

confidence: 99%

Evaluation of the Performance and Quality of Wastewater Treated by M’zar Plant in Agadir, Morocco

Mansir¹,

Oertlé

Choukr‐Allah

2021

Water

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The aim of our study is based on the characterization of the effluents treated by the M’zar plant, the monitoring of its purification performance after each treatment stage and the benefits of treated wastewater reuse in Souss-Massa region. Physico-chemical and bacteriological analyses were performed monthly from May 2019 to September 2020 on four types of water: Raw Water (RW), Settled Water (SW), Filtered Water (FW) and Purified Water treated by ultraviolet radiation (PWUV). After treatment, the pH values were close to neutrality and the concentrations of COD, BOD5, SM and bacteriological parameters were below the limits recommended by Moroccan standards, with a satisfactory abatement rate (between 97.5% and 100%), with the exception of electrical conductivity, which recorded very high values (3.7 dS/cm in PWUV) due to the salt discharged by the fish industries. In fact, the treated wastewater is rich in nitrates (289.24 mg/L in PWUV) and their reuse in agriculture can therefore contribute to making significant savings in terms of fertilization (2.08 t/day of nitrogen with a daily flow of 30,000 m3/day). Furthermore, a daily quantity of 2 to 5 tons of sludge is discharged, containing 40% to 60% of dry volatile matter, which results in the biogas production of 1275 m3/day/decanter.

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“…Le premier facteur peut être assimilé à une décantation qui dépend essentiellement de la taille des MES (EL HAFIANE et al, 2003). Dans le cas de cette étude et grâce aux systèmes d'agitation utilisés, l'impact de ce facteur sur les performances d'élimination du phosphore dans le CAHR est minime.…”

Section: Nutrimentsunclassified

Comparaison des systèmes d’agitation par diffuseur d’air et roue à aube dans un chenal algal à haut rendement

Nacir

Zouhir

Ouazzani

et al. 2012

rseau

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La technique d'épuration des eaux usées par chenal algal à haut rendement se distingue du lagunage traditionnel par un temps de séjour plus court, une faible profondeur, et une agitation mécanique constante. Cette agitation peut se faire soit par un jet d’eau, une roue à aube, ou encore un diffuseur d’air (air lift). Une comparaison du comportement hydrodynamique entre deux systèmes d’agitation les plus souvent utilisés pour des installations de traitement des eaux usées de type chenal algal à haut rendement (diffuseur d’air et roue à aube) est proposée. La puissance énergétique consommée par ces deux systèmes d’agitation est comparée par rapport à des vitesses de circulation de l’effluent usuellement rencontrées dans ce type de filière de traitement des eaux usées. Les performances épuratoires relatives des deux systèmes sont aussi analysées. Les résultats obtenus ont montré qu’en matière de consommation énergétique, le diffuseur d’air semble trois à cinq fois plus économique que la roue à aube. Cet avantage est confirmé aussi sur le plan des performances épuratoires puisqu’on a observé une meilleure élimination de l’azote total (NTK) et du phosphore en utilisant le système de diffusion d’air. Les résultats de ce travail montrent qu’un bon fonctionnement du chenal algal peut être obtenu en utilisant le diffuseur d’air comme système d’agitation.

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Mécanismes d'élimination de l'azote et du phosphore dans un chenal algal à haut rendement

Cited by 4 publications

References 11 publications

Decomposition and Mineralization Effect of Various Sources of Pig Manure on Water Quality and Nutrients Availability for Agro-Fish System in Benin

Decomposition and Mineralization Effect of Various Sources of Pig Manure on Water Quality and Nutrients Availability for Agro-Fish System in Benin

Evaluation of the Performance and Quality of Wastewater Treated by M’zar Plant in Agadir, Morocco

Comparaison des systèmes d’agitation par diffuseur d’air et roue à aube dans un chenal algal à haut rendement

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