Vinasse concentration by microfiltration followed by nanofiltration with membrane

Authors

  • Maria Thereza de Moraes Santos Gomes UNICAMP- Universidade Estadual de Campinas
  • Kaliana Sitonio Eça UNICAMP- Universidade Estadual de Campinas
  • Luiz Antonio Viotto UNICAMP- Universidade Estadual de Campinas

DOI:

https://doi.org/10.1590/S1678-3921.pab2011.v46.9509

Keywords:

permeate flux, cellulose membrane, polyethersulfone membrane, total solids retention

Abstract

The objective of this work was to evaluate vinasse concentration by microfiltration (MF) followed by nanofiltration (NF). The experiments were carried out in the laboratory, at 60°C and 500 rpm, using vinasse with 2.8% total solids (TS) in order to assess the influence of pressure on permeate flux and TS retention. Pressure ranged from 1.0 to 3.4 bar for MF, and from 15 to 35 for NF. A membrane cellulose with molecular weight cutoff of 100 kDA was used for MF, and a polyethersulfone (PES) membrane of 300, 500, and 1,000 Da was used for NF. MF at 1.8 bar was selected, because of its good flux and lower energy consumption, and the permeate obtained was subjected to NF. NF showed TS retention of 47–75%, and the highest permeate flux was obtained with PES 1,000 Da at 35 bar. The final concentrate has 4% of TS and is considered appropriate for soil use, in terms of chemical oxygen demand and TS content.

Author Biographies

Maria Thereza de Moraes Santos Gomes, UNICAMP- Universidade Estadual de Campinas

http://lattes.cnpq.br/78950152483772

Kaliana Sitonio Eça, UNICAMP- Universidade Estadual de Campinas

http://lattes.cnpq.br/2478527271760101

Luiz Antonio Viotto, UNICAMP- Universidade Estadual de Campinas

http://lattes.cnpq.br/3644584517452341

Published

2011-08-11

How to Cite

Gomes, M. T. de M. S., Eça, K. S., & Viotto, L. A. (2011). Vinasse concentration by microfiltration followed by nanofiltration with membrane. Pesquisa Agropecuaria Brasileira, 46(6), 633–638. https://doi.org/10.1590/S1678-3921.pab2011.v46.9509

Issue

Section

QUANTITATIVE METHODS