Traitement combiné d’un effluent textile contenant des colorants réactifs par coagulation-floculation et électroflottation

Bouyakoub, Amel Zahira; Kacha, S.; Ouhib, Rachid; Bellebia, Sohbi; Lartiges, Bruno

doi:10.7202/038927ar

Cited by 4 publications

(3 citation statements)

References 51 publications

(38 reference statements)

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“…However, they can be removed by different processes: electrocoagulation (Assémian et al 2018), Fenton (Briton et al 2018), coagulation/flocculation (Bouyakoub et al 2010), adsorption using activated carbon, membrane filtration (Han et al 2016;Sattar et al 2017), and combined coagulation/carbon adsorption (Papić et al 2004). Though these processes give good results, they have some drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of Rhodamine B dye with TiO2 immobilized on SiC foam using full factorial design

et al. 2020

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Textile effluents treatment is one of the important environmental challenges nowadays. Photocatalysis has proven its effectiveness for the removal of recalcitrant compounds, and it is considered as a green technology for the treatment of effluents. However, good photocatalytic yield is strongly related to the operating parameters. In this study, a supported TiO2 on a β-SiC foam was tested for the removal of Rhodamine B (RhB). The photocatalytic discoloration of RhB synthetic solution in our condition was about 90%. The effects of each parameter were assessed through a full factorial design. Sixteen tests were carried out and the response was RhB removal. The most influent parameters were TiO2/β-SiC foam quantity, the concentration of RhB, the volume of H2O2 and pH. Their contributions on RhB removal were, respectively, 53.01, 30.49, 2.7, and 2.48% according to Pareto diagram. Analysis of the coefficients shows that initial concentration of RhB and volume of H2O2 had a negative effect on the response. However, the quantity of TiO2/β-SiC foam and pH had a positive effect on the response. The influence of the flow rate on the process was assessed. The results showed a slight increase in RhB removal. Furthermore, the aging test of TiO2/β-SiC foam on the photocatalytic efficiency was carried out after ten successive photocatalysis tests. Only 6.7% loss of yield was observed. These results are very encouraging for an application at the industrial scale.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of Rhodamine B dye with TiO2 immobilized on SiC foam using full factorial design

et al. 2020

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“…In order to benefit from the purification capacities in each of the three processes mentioned above and to improve the results (Bouyakoub et al 2010), we chose to combine the three biological methods T1, T2 and T3, treating first with SBR (T1), then with anaerobic mode (T2) and to finalize the treatment; the resulting leachate was subjected to intensive aeration (T3). The choice of this order was made following the results obtained after leachate treatment by each of the methods used separately.…”

Section: Treatment Combining the Three Biological Processes (T4): (T1) + (T2) + (T3)mentioning

confidence: 99%

Evaluation of the effectiveness of leachate biological treatment using bacteriological and parasitological monitoring

Mherzi

Lamchouri

Zalaghi

et al. 2020

Int. J. Environ. Sci. Technol.

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Leachate of the uncontrolled landfill contains pollutants, which is discharged directly into the environment. The main objective of this study is to evaluate the reduction of bacteriological and parasitological risks by four biological treatments: sequencing batch reactor, anaerobic, intensive aeration and combination of the three processes. The results showed high bacteriological pollution in the raw leachate: 1.12 × 10 7 CFU/ml, 6.7 × 10 6 and 5.26 × 10 4 for total coliforms, faecal coliforms and Streptococci, respectively, parasites of intestinal helminths are also present: 11.86, 9.49, 9.83, 8.81 eggs/L for Enterobius vermicularis, Ascaris lumbricoides, Trichuris and Hymenolepis nana, and the values are higher than the standards for discharge into the natural environment. After sequencing batch reactor treatment, a decrease is noted in bacteria, Staphylococci, total coliforms and Streptococci with 99.63%, 97.11%, 99.93% and 94.62% abatement, respectively. This process also removes 75% of total unviable form and 80% of viable form of parasites. Intensive aeration and anaerobic treatments allowed the total elimination of total coliforms. Anaerobic processing allowed a reduction of 33.4% of unviable forms and 37% of viable forms of parasites, while a reduction of 63% of unviable and 77% of viable parasites was reported by intensive aeration. The combined treatment improves the results with abatement rates to 100% for total coliforms bacteria, and viable forms of the genus parasites: Capillaria sp., Toxocara (nematodes), Hymenolepis nana and Taenia (cestodes). A principal component analysis showed very significant correlations between all measured variables (bacteria and parasites). Combined treatment appears to be the best treatment to reduce biological risks of leachate.

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“…Al 3+ (aq) + H 2 O → Al(OH) 3 (precipitate) [7] The contact between the coagulant and the elements to remove in water is akeyelement for the success of electrocoagulation. It can be ensured in various ways, by mechanical agitation using magnetic stirrer [16], or mobile agitation blade type [17], [18].Recently, some authors [19]- [22], have used the flow of airlift loop to ensure the transport and increase contact between the coagulant and the elements to remove. A recent study on the application of electrocoagulation in an airlift reactor internal loop was done for treatment of colored wastewater [23].…”

Section: Page 10mentioning

confidence: 99%

Suspended Solids and Organic Matter Elimination from Superficial Raw Waters by Electrocoagulation Process in an Airlift Reactor Internal Loop

Eddaqaq¹,

Lekhlif²,

Dani³

et al. 2016

IJAC

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In this work, an airlift reactor with internal loop using electrocoagulation technology for superficial raw water treatment has been studied. The objective was the evaluation of the effect of applied voltage on turbidity reduction.For this purpose, synthetic solutions with known turbidities were prepared and tested. The airlift reactor has two parallel compartments, separated by a partition: an upward flow compartment, called riser, in which aluminum electrodes were immersed, and another down flow compartment called downcomer. Different potentials generated by an electric generator were applied on electrodes (0 to 12 Volts). During electrocoagulation, small gas bubbles generated on electrodes (hydrogen at the cathode and oxygen at the anode) cause recirculation synthetic solutions between the riser and the downcomer. Evaluation of removal performance of the turbidity in the reactor internal airlift loop with electrocoagulation led to conclusive results. The yield increases with time, it is best when the applied voltage increases. At 12 V, it reached 96%.

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Traitement combiné d’un effluent textile contenant des colorants réactifs par coagulation-floculation et électroflottation

Cited by 4 publications

References 51 publications

Photocatalytic degradation of Rhodamine B dye with TiO2 immobilized on SiC foam using full factorial design

Photocatalytic degradation of Rhodamine B dye with TiO2 immobilized on SiC foam using full factorial design

Evaluation of the effectiveness of leachate biological treatment using bacteriological and parasitological monitoring

Suspended Solids and Organic Matter Elimination from Superficial Raw Waters by Electrocoagulation Process in an Airlift Reactor Internal Loop

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