Continuous electrocoagulation treatment of pulp and paper mill wastewater: operating cost and sludge study

Mahesh, S.; Garg, Krishan Kishor; Srivastava, Vimal Chandra; Mishra, Indra Mani; Prasad, B.; Mall, Indra Deo

doi:10.1039/c5ra27486a

Cited by 62 publications

(23 citation statements)

References 55 publications

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“…In order to enhance the treatment process of paper industrial wastewater, the Electro-coagulation unit has been used after the hydrocyclone separation. The overflow stream which was produced by the hydrocyclone at the optimum conditions is fed to the Electro-coagulation unit at an operating voltage of 30 V and at an electric current of 1 Ampere for 10 min (Mahesh et al, 2016). The characterestics of the treated wastwater was carried out using the following units PH meter, BOD Trak (bottle), COD Reactor, Turbidity/Colorimetry, Density meter, TSS meter, DR 2010 Spectro photo meter, CG 855 Conductivity meter.…”

Section: Methodsmentioning

confidence: 99%

A combined hydrocyclone - electrocoagulation treatment for different types of industrial wastewater

Farghaly¹,

Attia²,

Saleh³

et al. 2021

Physicochem. Probl. Miner. Process.

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Every year, a large amount of mineral processing wastewater is discharged from various industries into the environment which is considered a challenging task not only because of its large volume, but more importantly, its hazardous components, while its reuse as feedwater without proper treatments causes great harm to the final product of these industries. Cost-effective methods are required to treat a wide range of industrial wastewater in a diverse range of conditions. In this study, a combined hydrocyclone-electrocoagulation system is tried to treat the wastewater for industries with high water consumption and high pollutants such as paper industry, iron and metal forming industry, and marble industry. The effects of the hydrocyclone operational parameters, such as feed inlet pressure and diameter, vortex finder diameter, apex diameter, and feed solids content, were investigated. In the case, wastewater of paper industry, the following optimum conditions (P = 4.5 bar, ! " = 15.8 mm, ! # = 6 mm, ! $ = 4 mm and % & = 2.3%) were achieved. An overflow of about 90.58% water recovery and 21.45% solid at 75.92% separation efficiency was obtained. The results showed that the hydrocycloneelectrocoagulation treatment has efficiently treated the three different types of industrial wastewater. The chemical oxygen demand (COD), biochemical oxygen demand (BOD), total solid (TS), total suspended solids (TSS), colour and turbidity, were reduced sharply and met the effluent discharge or reuse standards. Also, compared with the hydrocyclone-treated wastewater, the hydrocyloneelectrocoagulation-treated wastewater was found to be more enhanced.

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Section: Methodsmentioning

confidence: 99%

A combined hydrocyclone - electrocoagulation treatment for different types of industrial wastewater

Farghaly¹,

Attia²,

Saleh³

et al. 2021

Physicochem. Probl. Miner. Process.

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“…Mahesh et al [13] define a continuous electrocoagulation system in their study. This system operates with principles of batch processes, and it uses a MP-P electricity feed.…”

Section: Different Continuous Ec Systemsmentioning

confidence: 99%

“…In the literature many different kinds of systems for both of these processes can be found [9,10,11,12]. Some earlier continuous processes are modifications of batch processes like those that Makesh et al [13,14] used. There is a need to improve the controllability of these processes.…”

Section: Introductionmentioning

confidence: 99%

Comparison of batch and novel continuous electrocoagulation processes in the treatment of paint industry wash water

Rajaniemi¹,

Raulio²,

Tuomikoski³

et al. 2019

Desalination and Water Treatment

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Water is crucial to all life forms on earth. Still, millions of people are suffering from a lack of fresh water. The one of the most important reasons is industrial pollution. That is why more effective and economical water treatment systems must be developed and studied worldwide. In this study, a new design of continuous electrocoagulation systems is introduced and compared to widely studied batch process systems. This novel design improves the controllability of water flow and electricity. In the treatment of paint industry wash water, a batch system and a novel continuous electrocoagulation system with an aluminum (Al) anode and an iron (Fe) cathode were used. Two parallel analyses of both processes were conducted, and the average efficiency of chemical oxygen demand (COD) and Al removal were 68% and 79.8% in batch and 69.7% and 62.1% in the continuous system, respectively. The number of microbes decreased by 99.6% in the batch and by 99.8% in the continuous system. The calculated operational costs in this experiment were 1.63 €/m 3 for the batch and 1.19 €/m 3 for the continuous system. The novel continuous electrocoagulation process was as efficient as the batch process in this study.

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“…The water environment is globally being polluted by organic dyes mainly discharged from textile 3 , paper and pulp [4][5][6] , printing, leather pigmentation, dyestuff, plastic and other such industries. It is estimated that about 10-20% of dyes are wasted upon complete utilization in the dyeing unit with ~125-150 L of water used for 1 kg of textile produced.…”

Section: Introductionmentioning

confidence: 99%

CuO Coated Electrochemically Generated Textile Wastewater Sludge and CuO Coated GAC as Potential Nano-adsorbents for Color Removal from Real Textile Wastewater

H¹,

Sahana²

2018

Orient. J. Chem

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A laboratory scale setup was used to remove color from real textile wastewater (TWW) using nano CuO coated electrochemically generated sludge and nano CuO coated GAC. ECC studies were conducted in batch-mode to generate sludge treating real TWW using pre-optimized 4SS electrodes using a 1.5L reactor operated at cell voltage of 18V and current density 180A/m2 at an agitation speed of 500rpm for 60min electrolysis time. SEM, FTIR and XRD analysis confirmed CuO material successfully coated/decorated on electrochemically generated sludge of size ~0.3-0.5mm and GAC of size ~0.5mm. To check the color removal efficiencies from TWW the batch adsorption studies were conducted for adsorbent dose, stirring time and pH. The optimal operating conditions achieved at pH-4, dose of 0.6g/L and 30min contact time for CuO-sludge nano-adsorbent achieving 50-55% color removal. Similarly, for CuO-GAC nano-adsorbent the optimal conditions obtained at pH-4, 0.5 g/L dose and 20min contact time achieving ~100% removal.

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Continuous electrocoagulation treatment of pulp and paper mill wastewater: operating cost and sludge study

Abstract: Schematic view of continuous electrocoagulation set up.

Cited by 62 publications

References 55 publications

A combined hydrocyclone - electrocoagulation treatment for different types of industrial wastewater

A combined hydrocyclone - electrocoagulation treatment for different types of industrial wastewater

Comparison of batch and novel continuous electrocoagulation processes in the treatment of paint industry wash water

CuO Coated Electrochemically Generated Textile Wastewater Sludge and CuO Coated GAC as Potential Nano-adsorbents for Color Removal from Real Textile Wastewater

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