Membrane bioreactors for treatment of galvanic wastewater

Abstract

The article speaks about the membrane methods applied for treatment of galvanic sewage. It reveals the main features and peculiarities, which determine the maintenance of various types of membranes for industrial wastewater treatment. Ultrafiltration is a method that uses a membrane to separate by size ions of heavy metals, petroleum products, macromolecules and suspended solids. Application of ceramic membranes in ultrafiltration plants allows implementing of various technological processes with resource-saving opportunities, such as treatment of galvanic workshops sewage with efficiency of 99% and entire restoration of the worked out solutions. Nanofiltration is a process of membrane filtration of wastewater, which ensures the removal of multi-charged ions from water, depending on the size. Reverse osmosis is a process that is used to desalinate the bulk of dissolved salts in wastewater of various industries. In addition, this process is used to ensure the purification of effluents from organic and inorganic compounds, suspended solids and high molecular weight compounds.

Removal of heavy metals from wastewater using reverse osmosis

“…Cellulose acetate (CA) and thin-film composite (TFC) membranes are attracting industry interest, and the TFC membrane is attractive for its ability to reject solutes. CAs and aromatic polyamides (APs) are the active polymer derivatives used for RO membrane coatings (Sagle and Freeman, 2004;Ahmed et al, 2015;Makisha, 2019;Alanood et al, 2021).…”

Polymer Membranes as Innovative Means of Quality Restoring for Wastewater Bearing Heavy Metals

“…For this process to occur, high pressure must be exerted on the high concentration side of the membrane [119,120]. Among the areas of RO use, it is worth mentioning water recycling processes and metal recovery purposes [121]. RO proved to be the easiest approach of desalting seawater and brackish water.…”

“…Literature studies deal with removing heavy metals by means of different types of RO membranes, and the effects of different working parameters are being investigated [121][122][123]. Furthermore, one study compared RO and NF.…”

“…The literature describes the use of both commercial and synthetic RO polymeric membranes. In this context, it should be mentioned the use of polyamide thin-film composite membrane commercialized under the trade name TW30-1812-50, for the removal of Ni, Cu, and Zn [121,123], synthetic water being used for this purpose (containing CuSO 4…”