Removal of Dyes from Wastewater by Ceramic Membrane

Abstract

The current study aimed to investigate the elimination of dyes from sewerage, using microfiltration membrane mechanism. Three dyes were applied, acid yellow-23, disperse blue -79 and acid orange -7. Experiments were performed with feed concentration (40 -120) ppm, feed flow rate (25 -65) l/h and time (0.25 -1.5) h. The membrane used ceramic membrane, constructed as a candle. It was discovered that water flow diminishes with an elevation in running time, feeding oil concentration and enhancing with elevation in the feed flow rate. In addition, it was determined that the elimination (rejection) rate of dyes enhances with elevation in the flow rate, and the elimination (rejection) rate diminishes as time passes. In cross flow microfiltration, the rejection concentration (concentrate) goes up as time passes, with high feed concentration and flow rate. It was also discovered that the modal infusion concentration declines with high feed concentration and working time. In addition, it was found that product rate goes down as time passes and with high feed concentration. Increasing feed concentration of dyes was associated with an increase in the concentration of rejecting solution. The highest elimination of disperse blue -79, Acid Yellow- 23 and acid orange -7, are 97%, 96.4% and 95.8%, respectively. The maximum recovery percentage of disperse blue - 79, acid yellow- 23 and acid orange -7are 57.7%, 58.5% and 59% respectively.

Utilization of Waste of Enzymes Biomass as Biosorbent for the Removal of Dyes from Aqueous Solution in Batch and Fluidized Bed Column

“…A dye solution of known concentration was made in 100 L capacity glass storage tank (2). This solution was then pumped by a 1 hp pump (6) through the dead fungal biomass bed across a Rota meter (3). The flow rate to the fluidized bed was kept constant by adjusting the valve (5) of the bypass line and the manually controlled valve (4) of the main flow path.…”

“…Dyes are colored materials which can be used in leather, food, paper, textile, printing, and plastics industries. Several methods have been used to remove dyes from the influent water like reverse osmosis, membrane separation, chemical oxidation, coagulation, activated sludge process, and biological treatments; however, the most efficient used method is the adsorption/biosorption method [2,3].The adsorption/ biosorption process has been widely used in wastewater treatments for several reasons such as; it has a simple operating procedure, a relatively small operating space, a capacity for large treatment volumes of effluent, has significant yields, has a large range of feed concentrations, a regeneration of biosorbent, fairly low cost with high efficiency, and an easy scaling-up [4,5]. The decolorization of dyes requires high attention from authorities due to their toxicity, carcinogenic and mutagenic behavior [6].…”

“…Dyes are colored materials which can be used in leather, food, paper, textile, printing, and plastics industries. Several methods have been used to remove dyes from the influent water like reverse osmosis, membrane separation, chemical oxidation, coagulation, activated sludge process, and biological treatments; however, the most efficient used method is the adsorption/biosorption method [2,3].…”

PPSU dual layer hollow fiber mixed matrix membranes with functionalized MWCNT for enhanced antifouling, salt and dye rejection in water treatment

“…7 The whole range of membrane processes from microfiltration to reverse osmosis has demonstrated to remove dyes at different extent and specific efficiency. 8,9 In this context the fractionation of dye/salt mixtures has emerged as a new approach to deal with the dye and salt pollution, which attempts to reutilize dyes for other dyeing process and salts for other processes such as forward osmosis. 10,11 Among membrane processes loose nanofiltration (L-NF) stands out because not only offers high-dye removal efficiency rates but it also capable to remove low-molecular weight compounds and in a lower extent removes multivalent salts with the advantage of a relatively low investment and low operative and maintenance costs.…”

“…Also, as this method does not deal with living organisms, is considered to be very predictable 7 . The whole range of membrane processes from microfiltration to reverse osmosis has demonstrated to remove dyes at different extent and specific efficiency 8,9 …”