Treatment of combined bleaching effluent by membrane filtration technology for system closure in paper industry

Shukla, Sudheer Kumar; Kumar, Vivek; Bansal, M. C.

doi:10.5004/dwt.2010.1034

Cited by 10 publications

(2 citation statements)

References 11 publications

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“…Membrane filtration at low pressure is reported to be best for bleach effluent treatment in pulp and paper mills [ 23 ]. Likewise, it has also been reported that the performance of using RO in the reduction in pulp and paper industry effluent is higher than UF and nanofiltration [ 24 ]. In addition, the authors of [ 25 ] have recommended the combined RO-UF membrane process for the treatment of wastewater.…”

Section: Resultsmentioning

confidence: 99%

Integration of Pre-Treatment with UF/RO Membrane Process for Waste Water Recovery and Reuse in Agro-Based Pulp and Paper Industry

2023

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This recent study aims to evaluate the efficacy of membrane filtration on recovery of water resource from agro-waste such as bagasse, crop-based pulp and paper mill waste. A mini pilot scale membrane system having a combination of pre-treatment filter unit (pre-filter, sediment filter and pre-carbon filter), ultra-filtration and reverse osmosis with spiral wound configuration were employed to evaluate the water reuse efficacy of effluent coming from the secondary clarifier of the conventional treatment plant of the mill. The operational conditions were optimized using Taguchi method at pH 8, temperature 32 °C, and pressure 2 bar and a flow rate of 60 l/hr. The qualities of the effluent from the secondary clarifier, and the permeate from both the combination, viz. Combination 1 (pre-treatment + ultra-filtration) and Combination 2 (pre-treatment + ultra-filtration+ reverse osmosis) were analyzed and the percentage reduction in pH, TDS, TSS, BOD, COD, Color, Lignin, Potassium and Sodium were calculated. The elimination of TDS, COD and BOD with Combination 1 was not promising (<22%). However, the installation of a RO membrane greatly reduced (>88%) the contaminants in both paper mill effluents. The obtained qualities of water from all the combinations were compared with the tolerance standard for reuse as process water. The quality of effluent from the secondary clarifier did not agree with any class of water quality. The permeate from the combination of pre-treatment and UF sufficiently reduced the TSS to reach the requirement. However, the combination of (pre-treatment + UF + RO) adequately complied with the quality standard required for reuse in the making of all grades of paper.

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Section: Resultsmentioning

confidence: 99%

Integration of Pre-Treatment with UF/RO Membrane Process for Waste Water Recovery and Reuse in Agro-Based Pulp and Paper Industry

2023

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“…The addition of the RO unit, however, resulted in the total degradation of COD, lignin, and color at a pH of 5.74 . In a study by Shukla et al, when combined acidic and alkaline bleaching wastewaters were fed to the RO feed side, the removal of color was greater than COD. Even though RO does not require chemicals or thermal energy and can be used for tertiary treatment applications, it is not recommended to use RO directly for highly contaminated wastewater since higher levels of COD and lignin adversely affect the quality of the permeate.…”

Section: Physical and Chemical-based Treatmentmentioning

confidence: 98%

A Comprehensive Review on Pulp and Paper Industries Wastewater Treatment Advances

Esmaeeli,

Sarrafzadeh,

Zeighami

et al. 2023

Ind. Eng. Chem. Res.

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The pulp and paper industry generates vast amounts of wastewater, and its character heavily depends on various factors (raw material, the undertaken process, the final product, etc.). The wastewater from this sector, which originates from several sources in each mill and are mostly combined, is polluting and hazardous. This paper presents a state-of-the-art review of the physical, chemical, biological, and advanced hybrid treatment techniques, concerning their effectiveness in removing specific pollutants, namely, chemical oxygen demand, lignin, color, and adsorbable organo-halogens. Throughout the manuscript, at the end of each section, a conclusive comparison has been presented and the proper method is introduced. Furthermore, numeric data regarding the effectiveness of each technique toward each pollutant are gathered from the literature and are available in the Supporting Information of the paper. Biological treatment processes using anaerobic–aerobic treatment mostly cure organic biodegradable contaminants (75–90% COD removal). Moreover, biological treatment using a consortium of microorganisms can potentially increase color removal efficiency (from 65 to 97%). Hybrid treatment is also among the candidates for color removal. To treat complex matters (lignin and AOX), physical and chemical treatments have shown promising performance, but they are generally expensive and impractical to treat huge amounts of wastewater. For the treatment of high molecular weight contaminants (lignin) advanced oxidation processes (AOPs), including ozonation and Fenton-based treatment, have shown great performance (90–99%); however, they are limited due to their maintenance and operation costs. To overcome these challenges, source separation of the wastewater streams in the pulp and paper industry is recommended. AOPs or membrane technologies or hybrid processes are suggested for the bleaching effluent (80% AOX removal), which is relatively low in amount, and a combination of conventional treatment processes would be preferred to treat wastewater streams that are more biodegradable. The biological performance can also be enhanced using granular activated carbon on the sequence. Finally, for treating black liquor, adsorption processes have proven to be the prime candidate.

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Keramische Membrantechnologie für die Verfügbarmachung biogener Stoffströme

Ebrahimi

Humpert

Schönherr

et al. 2020

Chemie Ingenieur Technik

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Im Rahmen dieser Forschungsarbeit wurde ein effizientes membranbasiertes Verfahren zur Rückgewinnung von gereinigtem Ligninsulfonat (LS) aus der Dünnlauge des chemischen Holzaufschlusses mithilfe von keramischen Ultrafiltrationsmembranen entwickelt. Das Ziel dabei war, die Ligninsulfonate von niedermolekularen organischen Verunreinigungen (Zucker, Carbonsäuren etc.) und Prozesschemikalien abzutrennen, sie aufzukonzentrieren und sie für eine gezielte Weiterverwertung bereitzustellen. Ein weiterer Aspekt des Projektes war die Separation der Produkte (Zielmoleküle) der Lignosulfonatspaltung mittels keramischer Membrantechnologie.

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Treatment of combined bleaching effluent by membrane filtration technology for system closure in paper industry

Cited by 10 publications

References 11 publications

Integration of Pre-Treatment with UF/RO Membrane Process for Waste Water Recovery and Reuse in Agro-Based Pulp and Paper Industry

Integration of Pre-Treatment with UF/RO Membrane Process for Waste Water Recovery and Reuse in Agro-Based Pulp and Paper Industry

A Comprehensive Review on Pulp and Paper Industries Wastewater Treatment Advances

Keramische Membrantechnologie für die Verfügbarmachung biogener Stoffströme

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