Optimisation of colour and sugar rejection of black liquor using membranes

Adikane, H.V.; Thakar, Dnyaneshwar M.; Nene, Sanjay

doi:10.1016/j.seppur.2003.08.001

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…These high rejection coefficients may be due to the great difference between the size of BSA molecules and the membrane pore size. When the foulant molecule size is much higher than the membrane pore size, these molecules can be retained on the membrane surface [25,26]. the polymeric membranes (7.5 mM) than in the case of the ceramic one (5 mM), because these were the values of NaCl concentration to obtain the highest HCE for each membrane at the experimental conditions above mentioned.…”

Section: Fouling Experimentsmentioning

confidence: 98%

Salt cleaning of ultrafiltration membranes fouled by whey model solutions

Corbatón-Báguena

Álvarez-Blanco

Vincent‐Vela

2014

Separation and Purification Technology

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Section: Fouling Experimentsmentioning

confidence: 98%

Salt cleaning of ultrafiltration membranes fouled by whey model solutions

Corbatón-Báguena

Álvarez-Blanco

Vincent‐Vela

2014

Separation and Purification Technology

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“…Thus, membrane flux decreased rapidly. With the filtration continued, the concentration polarization gradually reached a stable state, and the flux of the film maintained a stable state [ 33 ]. At 25–55 min, it was observed that the downward trend of membrane flux under four pressure conditions significantly reduced, and the membrane flux tended to be stable.…”

Section: Resultsmentioning

confidence: 99%

The Performance of Ultrafiltration Process to Further Refine Lactic Acid from the Pre-Microfiltered Broth of Kitchen Waste Fermentation

Guo

Zhao

et al. 2023

Membranes

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Lactic acid (LA) is an important chemical material facing rapid demand in recent years. The oriented fermentation of kitchen waste is a promising route for economic LA production. However, the refinement of LA from fermentation broth is a spiny issue. In this study, the performance of ultrafiltration (UF) process for the refinement of LA from the pre-microfiltered broth of kitchen waste fermentation was first investigated. The results showed that with 50 KDa polyethersulfone membrane, under the optimum pressure of 120 KPa, the pH of 6.0, and the backflushing mode with the deionized water for 3 min, the best performance was achieved with the chroma removal efficiency, turbidity removal efficiency, protein removal efficiency and total sugar removal efficiency of 54.3%, 89.8%, 71.7% and 58.5%, respectively, and LA recovery efficiency was 93.6%. The results indicated that the UF process could further effectively refine the pre-microfiltered broth of kitchen waste fermentation, and the combination of microfiltration and UF process is ideal for achieving desirable LA refinement performance. This study verified the feasibility of UF process in LA refinement from pre-microfiltered broth of kitchen waste fermentation, and based on the results, the further exploration of proper post-process to treat UF filtrate for obtaining LA product with higher quality should be explored in the future.

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“…Email: eonatece@gmail.com to bleaching effluents from traditional chlorine-based bleaching plants and modern elementary chlorine free (ECF) and totally chlorine free mills. [5][6][7][8][9][10][11][12][13] In particular, UF membranes have been tested as potential alternatives to conventional multiple evaporators to concentrate sulphite and black liquors, [6] recover lignosulphonates, sugars, vanillin and hemicelluloses, [6,[14][15][16][17] and recover water from treated whole effluents. [1,[18][19][20][21] Although in most cases acceptable results were obtained, fouling and reduced permeate flow due to complex chemical and electrical interactions between the membrane surface and dissolved molecules affected long-term operational efficiencies.…”

Section: Introductionmentioning

confidence: 99%

Membrane treatment of alkaline bleaching effluents from elementary chlorine free kraft softwood cellulose production

Oñate¹,

Rodrı́guez²,

Bórquez³

et al. 2014

Environmental Technology

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This paper reports experimental results on the sequential use of ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) to fractionate alkaline extraction bleaching effluents from kraft cellulose production. The aim was to unveil the way key pollutants are distributed when subjected to sequential UF/NF/RO membrane separation processes. Alkaline bleaching effluents were obtained from a local pinewood-based mill, featuring elementary chlorine free bleaching to produce high-brightness cellulose. The experimental system was based on a laboratory-scale membrane system, DSS LabStak® M20 Alfa Laval, using Alfa Laval UF and NF/RO membranes, operated at a constant transmembrane pressure (6 bar for UF membranes and 32 bar for NF/RO membranes), at 25°C. Results show that 78% chemical oxygen demand (COD) and total phenols, 82% adsorbable organic halogens (AOX) and 98% colour were retained by UF membranes which have molecular weight cut-off (MWCO) above 10 kDa. In all, 16% of original COD, total phenols and AOX, and the remaining 2% colour were retained by UF membranes within the 1 to 10 kDa MWCO range. Chloride ions were significantly present in all UF permeates, and RO was required to obtain a high-quality permeate with a view to water reuse. It is concluded that UF/NF/RO membranes offer a feasible option for water and chemicals recovery from alkaline bleaching effluents in kraft pulp production.

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Optimisation of colour and sugar rejection of black liquor using membranes

Cited by 5 publications

References 6 publications

Salt cleaning of ultrafiltration membranes fouled by whey model solutions

Salt cleaning of ultrafiltration membranes fouled by whey model solutions

The Performance of Ultrafiltration Process to Further Refine Lactic Acid from the Pre-Microfiltered Broth of Kitchen Waste Fermentation

Membrane treatment of alkaline bleaching effluents from elementary chlorine free kraft softwood cellulose production

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