Multi-Response Optimization of Process Parameters for Imidacloprid Removal by Reverse Osmosis Using Taguchi Design


GENÇ N. , DOGAN E. , NARCI A. O. , BICAN E.

WATER ENVIRONMENT RESEARCH, vol.89, no.5, pp.440-450, 2017 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 89 Issue: 5
  • Publication Date: 2017
  • Doi Number: 10.2175/106143017x14839994523460
  • Title of Journal : WATER ENVIRONMENT RESEARCH
  • Page Numbers: pp.440-450
  • Keywords: membrane processes, imidacloprid wastewater, multi-response S/N ratio, optimization, Taguchi methods, MULTI RESPONSE OPTIMIZATION, QUALITY LOSS FUNCTION, MILL WASTE-WATER, RO MEMBRANES, NANOFILTRATION MEMBRANES, PESTICIDE REMOVAL, ADSORPTION, SORPTION, SOIL, SIZE

Abstract

In this study, a multi-response optimization method using Taguchi's robust design approach is proposed for imidacloprid removal by reverse osmosis. Tests were conducted with different membrane type (BW30, LFC-3, CPA-3), transmembrane pressure (TMP = 20, 25, 30 bar), volume reduction factor (VRF = 2, 3, 4), and pH (3, 7, 11). Quality and quantity of permeate are optimized with the multi-response characteristics of the total dissolved solid (TDS), conductivity, imidacloprid, and total organic carbon (TOC) rejection ratios and flux of permeate. The optimized conditions were determined as membrane type of BW30, TMP 30 bar, VRF 3, and pH 11. Under these conditions, TDS, conductivity, imidacloprid, and TOC rejections and permeate flux were 97.50 97.41, 97.80, 98.00% and 30.60 L/m(2).h, respectively. Membrane type was obtained as the most effective factor; its contribution is 64%. The difference between the predicted and observed value of multi-response signal/noise (MRSN) is within the confidence interval.