Technology of streptomycin sulfate separation by two‐stage foam separation

Abstract

Industrial discharges from manufacturing streptomycin sulfate (SS) are inhibitory to biological wastewater treatment and need to be stripped of residual SS. For effective SS recovery from the wastewater, a two-stage foam separation technology was investigated using a column with a vertical ellipsoid-shaped channel (VEC) and a conventional one, and sodium dodecyl sulfate (SDS) served as the collector. The mechanism of enhancing foam drainage by VEC was theoretically analyzed. In the first stage, the column with VEC was used and under the optimal conditions of the liquid-loading volume 300 mL, volumetric airflow rate 100 mL/min, the initial pH 7.0 and the molar ratio of SDS to SS 8.0, an improved SS enrichment ratio of 16.7 was obtained. In the second stage, a conventional column was used and with a volumetric airflow rate of 450 mL/min, the foamate had a SS concentration of about 0.5 g/L, so it was used as the feed solution of the first stage. By the two-stage technology, the total SS recovery percentage reached as high as 99.7%. Thus, it was significantly effective for the two-stage foam separation technology to recover SS from the simulative wastewater.

Recovery of streptomycin sulfate from the wastewater using foam fractionation coupled with adsorption separation for reusing sodium dodecyl sulfate

“…The foam fractionation technology was studied in previous work using two‐stage foam fractionation . SS concentration of the simulated wastewater was 0.5 g L −1 .…”

“…SS concentration was measured by the colorimetric method at wavelength 216 nm . SDS concentration was measured by the methylene blue colorimetric method at wavelength 651 nm …”

“…Lu et al used cetyl trimethyl ammonium bromide (CTAB) as the collector to remove dyes from real textile wastewater. Han et al and Li et al investigated the foam fractionation of SS using SDS as the collector. The studies mentioned above show that the surfactants are effective for removing hazardous materials using foam fractionation.…”

“…The wastewater should be pretreated to remove SS using foam fractionation with SDS as the collector. The separation of SS from its wastewater using foam fractionation was studied in previous work, the results of which will be directly used in the current work. The major effort will be on developing a novel technology of foam fractionation coupled with adsorption separation for separating SS from the foamate and reusing SDS acted as the collector.…”

Intensification of the separation of CuO nanoparticles from their highly diluted suspension using a foam flotation column with S type internal

“…However, the reported columns based on the latter principle are not suitable for large-scale foam flotation of nanoparticles. Specifically, the scale-up of the Eiffel Towershaped, bowl-shaped, or ellipsoid-shaped column will result in a large loss of useful space (Saint-Jalmes et al 2000;Linke et al 2005;Li et al 2012). So inserting an internal into a conventional foam flotation column to achieve the successive expansion and contraction of foam flows is more practical.…”