Basic laws of elektrobaromembrane of wastewater treatment process from Fe3+ ions with obtaining the alkali, acid and hydrogen
DOI:
https://doi.org/10.20535/1810-0546.2015.3.60709Keywords:
Wastewater treatment, Elektrobaromembrane method, Membrane of titanium, Hydroxo-complexes of iron, Production of alkali, acid and hydrogenAbstract
Background. The various methods used to clean the wastewater for the iron removal do not always provide a high degree of purification by ion Fe3+. Therefore, the development of new highly effective methods of treatment of waste water is very important and urgent.
Objective. The study of basic laws of non-reagent elektrobaromembrane process wastewater treatment of Fe3+ ions with the help of a tubular titanium membrane-cathode to obtain alkali, acid and hydrogen, as well as development on this basis of the principal block scheme of such treatment is considered.
Methods. The Elektrobaromembrane method is used with tubular membranes of titanium as the cathode.
Results. It has been investigated an influence of current density, of operating pressure, duration of the process, the concentration of Fe3+ ions in the initial solution on the delay factor R of the ions, their concentration in the filtrate, specific performance Jv of the membrane-cathode in water and leachate, pH leachate and recirculating solution. It is shown that for water with a concentration of ions Fe3+ in the range 50–100 mg/dm3 should be used the current density of 150–300 A/m2 at an operating pressure of about 0,1–0,2 MPa.
Conclusions. Based on the results has been developed principal block scheme of water treatment from Fe3+ ions to obtain alkali, acid and hydrogen by elektrobaromembrane method. At the same time can get in 1 hour on 1 m2 of the surface tubular membrane-cathode 15–60 dm3 of alkali with pH ~ 12; 20–65 dm3 of hydrogen and appropriate amount of acid with pH ~ 2.5.
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