Treatment of the Bleaching Effluent from Sulfite Pulp Production by Ceramic Membrane Filtration

Membranes

Mehrdad Ebrahimi²  Nadine Busse²  Steffen Kerker²  Oliver Schmitz²  Markus Hilpert¹  Peter Czermak² 

[1] Sappi Fine Paper Europe, 89584 Ehingen, Germany;Institute of Bioprocess Engineering and Membrane Technology, University of Applied Sciences Mittelhessen, 35390 Giessen, Germany;

关键词: ceramic membrane;    bleaching effluents;    waste water treatment;    chemical oxygen demand removal;    membrane fouling;    permeate flux rate;   

DOI  :  10.3390/membranes6010007

来源: mdpi

【 摘 要 】

Pulp and paper waste water is one of the major sources of industrial water pollution. This study tested the suitability of ceramic tubular membrane technology as an alternative to conventional waste water treatment in the pulp and paper industry. In this context, in series batch and semi-batch membrane processes comprising microfiltration, ultrafiltration and nanofiltration, ceramic membranes were developed to reduce the chemical oxygen demand (COD) and remove residual lignin from the effluent flow during sulfite pulp production. A comparison of the ceramic membranes in terms of separation efficiency and performance revealed that the two-stage process configuration with microfiltration followed by ultrafiltration was most suitable for the efficient treatment of the alkaline bleaching effluent tested herein, reducing the COD concentration and residual lignin levels by more than 35% and 70%, respectively.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.