Simultaneous optimization of multiple performance characteristics in coagulation–flocculation process for Indian paper industry wastewater

2012 ◽  
Vol 66 (6) ◽  
pp. 1231-1238 ◽  
Author(s):  
R. Saraswathi ◽  
M. K. Saseetharan
Keyword(s):  
Taguchi Method ◽  
Process Parameters ◽  
Paper Industry ◽  
Oxygen Demand ◽  
Simultaneous Optimization ◽  
Pulp Industry ◽  
Optimization Of Process Parameters ◽  
Paper And Pulp ◽  
Paper And Pulp Industry ◽  
Flocculation Process

The goal of this study was to optimize the coagulation–flocculation process in wastewater generated from the paper and pulp industry using a grey relational analysis (GRA)-based Taguchi method. Process parameters included types and doses of natural coagulants and coagulant aid, and pH. To track the efficiency of the treatment process, the following responses were chosen for optimization: chemical oxygen demand (COD), total dissolved solids (TDS) and turbidity of wastewater, alone or in combination or all together. Analysis of variance showed that the type and dose of the coagulant aid were the most significant parameters, followed by pH and the dose of the coagulant; the type of coagulant used was found to be insignificant in the coagulation–flocculation process. Optimization of process parameters to achieve lower turbidity and greater removal of COD and TDS was verified in a separate confirmatory experiment, which showed improvements in COD and TDS removal and a decrease in turbidity of 8.2, 6.35 and 26.17%, respectively, with the application of the Taguchi method and GRA.

scholarly journals Potential applications of waste lignin from the paper and pulp industry in Viet Nam

2020 ◽  
Vol 23 (4) ◽  
pp. 716-726
Author(s):  
Thanh Khoa Phung ◽  
Quynh-Thy Song Nguyen ◽  
Khanh B. Vu ◽  
Giang Duy-Le Vo ◽  
Vinh Ngoc Nguyen
Keyword(s):  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Forest Tree ◽  
Pulp And Paper ◽  
High Tech ◽  
Pulp Industry ◽  
Potential Applications ◽  
The Government ◽  
Paper And Pulp ◽  
Paper And Pulp Industry

The conversion of waste lignin from the paper and pulp industry is a potential process to produce chemicals and materials in the industry. With the development and the demand for the pulp and paper industry, the amount of waste lignin will increase remarkably. In Vietnam, the forest tree for the pulp industry is abundant, and the pulp industry has increased in recent years. In parallel, the government planned to develop the material resource and high-tech factories for this industry. In this work, we summarized the pulp and paper industry in Vietnam, then suggest the potential applications of waste lignin in several valuable products.

The effect of protic solvents in the conversion of lignin from Earleaf Acacia tree

2021 ◽  
Vol 11 (1) ◽  
pp. 123-126
Author(s):  
Khoa Phung Thanh ◽  
Khanh Vu Bao ◽  
Phat Huynh Van ◽  
Truc Nguyen Kim ◽  
An Tran Nguyen Minh ◽  
...  
Keyword(s):  
Aromatic Compounds ◽  
Solvent Polarity ◽  
Pulp Industry ◽  
Protic Solvents ◽  
Renewable Feedstock ◽  
Bulk Chemical ◽  
Paper And Pulp ◽  
Paper And Pulp Industry ◽  
Main Components ◽  
Acacia Tree

Lignin is one of main components of lignocellulosic along with cellulose and hemicellulose. It is a by-product of the paper and pulp industry, and has aromatic backbones making them an ideal renewable feedstock of aromatic compounds for a range of applications. Catalytic conversion of lignin from Earleaf Acacia tree was performed using high pressure/temperature reactor with Ru/C catalyst and protic solvents. The results showed that the conversion of lignin depends on the solvent polarity of protic solvents, and Ru/C catalyst enhanced the lignin conversion. Phenolic compounds are the main components of lignin conversion. Those compounds can be applied as a basement for bulk chemical and fuels.

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