Applicability of coagulation/flocculation and electrochemical processes to the purification of biologically treated vinasse effluent

Zayas, Teresa; Rómero, Viviana; Salgado, Leonardo; Meráz, M.; Morales, Ulises

doi:10.1016/j.seppur.2007.04.019

Cited by 60 publications

(29 citation statements)

References 26 publications

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“…3b shows that the maximum turbidity reduction efficiency (79.73 %) occurs at pH = 7.82. It is well known that the pH of the solution affects the hydroxyl radical generating capacity (Zayas et al 2007). According to Petala et al (2006), at a lower pH and with a lower coagulant dosage, the only mechanism for destabilization of particles is through charge neutralization.…”

Section: Resultsmentioning

confidence: 99%

Treatment of wastewater effluents from paper-recycling plants by coagulation process and optimization of treatment conditions with response surface methodology

2014

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In the present study, a coagulation process was used to treat paper-recycling wastewater with alum coupled with poly aluminum chloride (PACl) as coagulants. The effect of each four factors, viz. the dosages of alum and PACl, pH and chemical oxygen demand (COD), on the treatment efficiency was investigated. The influence of these four parameters was described using response surface methodology under central composite design. The efficiency of reducing turbidity, COD and the sludge volume index (SVI) were considered the responses. The optimum conditions for high treatment efficiency of paper-recycling wastewater under experimental conditions were reached with numerical optimization of coagulant doses and pH, with 1,550 mg/l alum and 1,314 mg/l PACl and 9.5, respectively, where the values for reduction of 80.02 % in COD, 83.23 % in turbidity, and 140 ml/g in SVI were obtained.

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Section: Resultsmentioning

confidence: 99%

Treatment of wastewater effluents from paper-recycling plants by coagulation process and optimization of treatment conditions with response surface methodology

2014

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“…However, as noted above, an anaerobic treatment may not be entirely effective in vinasse processing; thus, it has been suggested that a combination of biological and physicalchemical treatments might guarantee the appropriate final disposal of vinasse. Numerous investigations of vinasse post-treatment methods have been conducted, including those of adsorption treatments (Figaro et al, 2009;Satyawali and Balakrishnan 2007) and coagulation-flocculation, electrocoagulation, ozonation and ultrasonic treatments (Zayas et al, 2007;Inanc et al, 1999;Peña et al, 2003;Sangave et al, 2007). The disadvantages of these posttreatments include their operational difficulties, the high doses of required reagents, the high energetic costs, the unsatisfactory coagulant-recovery rates and the production of polluted sludge.…”

Section: Introductionmentioning

confidence: 99%

Combined Treatment of Vinasse by an Upflow Anaerobic Filter-Reactor and Ozonation Process

Cabrera-Díaz

Reyes

Dueñas-Moreno

et al. 2016

Braz. J. Chem. Eng.

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-The aim of the present study was to evaluate the efficacy of treating vinasse using anaerobic digestion (AD) followed by ozonation. The AD process was performed using a laboratory-scale upflow anaerobic filter reactor (UAFR) under continuous operation at 29 ± 1 °C. Stable conditions were reached at 10 kgCOD m -3 d -1 and a hydraulic retention time (HRT) of 5 days. Under these conditions, the efficiency of reduction of the chemical oxygen demand (COD) and the methane yield were 75.1% and 0.315 m 3 CH 4 kgCODr -1 , respectively. The anaerobically digested effluent was further treated using ozone in a bubbling column. An experimental 2 3 array [C(0 3 ) g = 70; 100 mgO 3 L -1 ; pH= 7.5; 10; tc = 1 and 3 h] was used. The best conditions for effluent ozonation were 100 mgO 3 L -1 , pH 7.5 and 3 hours of contact with ozone. The average efficiencies for COD, color and turbidity reduction were 82.4, 93.8 and 99.3%, respectively.

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“…Treated nejayote was obtained from raw nejayote subjected to a coagulation-flocculation process with the Südflock® P-63 coagulant and the Sumex Biofloc® A-01 flocculent, under specific conditions. This treatment allowed the removal of colloidal particles from the residual water and, therefore, partial removal of the organic content [11] [12] [13]. Blue native maize (Zea mays L.)…”

Section: Introductionmentioning

confidence: 99%

Application of Nejayote as a Foliar and Edaphic Fertiliser to Native Blue Maize (<i>Zea mays</i> L.) Crops

Téllez¹,

López²,

Aragón‐García³

et al. 2016

AJPS

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Raw and treated "nejayote" were assessed as foliar and edaphic fertilisers for native blue maize (Zea mays L.) crops in the municipality of Amozoc de Mota, Puebla, Mexico, during the 2015 agricultural cycle. Treated nejayote refers to raw nejayote subjected to a coagulation-flocculation process. Two states of nejayote were established (raw and treated nejayote) with different physicochemical properties. Foliar bio-fertilisers were prepared from raw and treated nejayote and mixed with organic matter (OM) to promote a fermentation process. The foliar treatments used were: BNC5, BNC15, BNC30 (raw nejayote-based bio-fertiliser at 5%, 15%, and 30%), BNCQ5, and NCQ30 (nejayote treated by chemical coagulation at 5% and 30%), with BT as a control (traditional bio-fertiliser). The edaphic treatments used were: NC50, NC75, and NC100 (raw nejayote at 50%, 75%, 100%), with AP as a control (drinking water), thus giving rise to 10 treatments in terms of content of raw or treated nejayote. Foliar and edaphic field treatments applied to native blue maize crops were statistically assessed using the following response variables: plant height, stem diameter, number of leaves, and grain yield. The experiment was laid out in a randomised complete block design (RCBD) with five replications of each treatment. The results obtained showed, that foliar or edaphic application at the different stages of development did not produce statistically significant differences, at P ≤ 0.05, in terms of response variables. The most significant effects occurred at the early stage of plant development and were mainly reflected in the stem diameter with foliar treatment NCQ30 and in the number of leaves with foliar treatment BNC5. At the final stage of crop development, the highest yield (0.639 ± 0.121 t•ha −1 ) was obtained with treatment BNC5, which produced a statistically significant difference (b) in relation to the rest of the foliar and edaphic treatments (Tukey P ≤ 0.05).

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Applicability of coagulation/flocculation and electrochemical processes to the purification of biologically treated vinasse effluent

Cited by 60 publications

References 26 publications

Treatment of wastewater effluents from paper-recycling plants by coagulation process and optimization of treatment conditions with response surface methodology

Treatment of wastewater effluents from paper-recycling plants by coagulation process and optimization of treatment conditions with response surface methodology

Combined Treatment of Vinasse by an Upflow Anaerobic Filter-Reactor and Ozonation Process

Application of Nejayote as a Foliar and Edaphic Fertiliser to Native Blue Maize (<i>Zea mays</i> L.) Crops

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Applicability of coagulation/flocculation and electrochemical processes to the purification of biologically treated vinasse effluent

Cited by 60 publications

References 26 publications

Treatment of wastewater effluents from paper-recycling plants by coagulation process and optimization of treatment conditions with response surface methodology

Treatment of wastewater effluents from paper-recycling plants by coagulation process and optimization of treatment conditions with response surface methodology

Combined Treatment of Vinasse by an Upflow Anaerobic Filter-Reactor and Ozonation Process

Application of Nejayote as a Foliar and Edaphic Fertiliser to Native Blue Maize (&lt;i&gt;Zea mays&lt;/i&gt; L.) Crops

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Application of Nejayote as a Foliar and Edaphic Fertiliser to Native Blue Maize (<i>Zea mays</i> L.) Crops