Chemical characterization by gas chromatography-mass spectrometry and inductively coupled plasma-optical emissionn spectroscopy of membrane permeates from an industrial dairy ingredient production used as process water

TY - JOUR

T1 - Chemical characterization by gas chromatography-mass spectrometry and inductively coupled plasma-optical emissionn spectroscopy of membrane permeates from an industrial dairy ingredient production used as process water

AU - Skou, Peter Bæk

AU - Khakimov, Bekzod

AU - Hansen, Thomas Hesselhøj

AU - Aunsbjerg, Stina Dissing

AU - Knøchel, Susanne

AU - Thaysen, Dorrit

AU - van der Berg, Franciscus Winfried J

PY - 2018/1

Y1 - 2018/1

N2 - Reusing reverse osmosis (RO) membrane permeate instead of potable water in the dairy industry is a very appealing tactic. However, to ensure safe use, the quality of reclaimed water must be guaranteed. To do this, qualitative and quantitative information about which compounds permeate the membranes must be established. In the present study, we provide a detailed characterization of ultrafiltration, RO, and RO polisher (ROP) permeate with regard to organic and inorganic compounds. Results indicate that smaller molecules and elements (such as phosphate, but mainly urea and boron) pass the membrane, and a small set of larger molecules (long-chain fatty acids, glycerol-phosphate, and glutamic acid) are found as well, though in minute concentrations (<0.2 µM). Growth experiments with 2 urease-positive microorganisms, isolated from RO permeate, showed that the nutrient content in the ROP permeate supports limited growth of 1 of the 2 isolates, indicating that the ROP permeate may not be guaranteed to be stable during protracted storage.

AB - Reusing reverse osmosis (RO) membrane permeate instead of potable water in the dairy industry is a very appealing tactic. However, to ensure safe use, the quality of reclaimed water must be guaranteed. To do this, qualitative and quantitative information about which compounds permeate the membranes must be established. In the present study, we provide a detailed characterization of ultrafiltration, RO, and RO polisher (ROP) permeate with regard to organic and inorganic compounds. Results indicate that smaller molecules and elements (such as phosphate, but mainly urea and boron) pass the membrane, and a small set of larger molecules (long-chain fatty acids, glycerol-phosphate, and glutamic acid) are found as well, though in minute concentrations (<0.2 µM). Growth experiments with 2 urease-positive microorganisms, isolated from RO permeate, showed that the nutrient content in the ROP permeate supports limited growth of 1 of the 2 isolates, indicating that the ROP permeate may not be guaranteed to be stable during protracted storage.

U2 - 10.3168/jds.2017-12950

DO - 10.3168/jds.2017-12950

M3 - Journal article

C2 - 29055547

SN - 0022-0302

VL - 101

SP - 135

EP - 146

JO - Journal of Dairy Science

JF - Journal of Dairy Science

IS - 1

ER -