Reuse the pulp and paper industry wastewater by using fashionable technology

K Sudarshan,P Kotteeswaran,A Murugan,K Maruthaiya

doi:10.1007/s13201-016-0477-1

Abstract

This proposed method is a promising way, which can be implemented in pulp and paper industries by effective removal of the color and chemical oxygen demand (COD) and the resulting treated water may surely reuse to the other streams. Fourier Transformer Infra Red spectra confirmed the presence of the respective functional groups in the removed pollutants from the wastewater. The efficiency of Non-ferric Alum (NF Alum) and cationic polyacrylamide (C-PAM) with and without power boiler fly ash was also studied. The reduction efficiency of color and chemical oxygen demand (COD) is evaluated at the optimum dosage of NF Alum, fly ash, and C-PAM. At the optimized pH attained from these coagulants using to treat the wastewater, the flocs formation/settling and the pollutant removal efficiency are encouraging and the resulting color of the wastewater is to 40 PtCo units from 330 PtCo units and COD to 66 mg/L from 218 mg/L. While using NF Alum alone with C-PAM for the treatment of wastewater, the highest reduction efficiency of COD is 97 mg/L from 218 mg/L and the color is 60 from 330 PtCo units at pH 4.8 was noted. From these observations, NF Alum and power boiler fly ash with C-PAM can effectively remove the pollutants from the pulp and paper mill wastewater and the water can be reused for other streams.

Highlights

The pulp and paper mill effluent formed at the mill is made up of large number of component streams and it generates different varieties of pollutant
This article is published with open access at Springerlink.com. This proposed method is a promising way, which can be implemented in pulp and paper industries by effective removal of the color and chemical oxygen demand (COD) and the resulting treated water may surely reuse to the other streams
This particular research work is achieved by the reduction of the pollution caused due to the diluted chemicals, such as phenol, aromatic primary amines, carboxylic acids, and lignin etc., from the wastewater

Summary

Introduction

The pulp and paper mill effluent formed at the mill is made up of large number of component streams and it generates different varieties of pollutant. Pulp mill bleach plant wastewater is the major source of the pollutant in pulp and paper industries (Razali et al 2012). Because of the chemicals used in the pulping and bleaching processes, such as sodium hydroxide, sodium carbonate, sodium sulfide, chlorine dioxide or elemental chlorine, hydrogen peroxide, sulphuric acid, etc., (Kamali and Khodaparast 2015). During bleaching of the pulp, the main aim is to be the removal of lignin (Sunakar et al 2012). The most of the lignin have been removed in the form of black liquor and it burned in the recovery boiler to generate energy and spent chemicals. The remained lignin has been eliminated during bleaching stages and it drained as effluent/wastewater

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