The Material Balance Calculation of Flowsheet for Nitrate Removal from Water Solutions Using Baromembrane Methods

Ольга Сергіївна Ієвлєва, Владислав Володимирович Гончарук

Abstract


Background. The high level of nitrate contamination in natural water is one of the main problems in environmental studies. The two-stage flowsheet is offered for solving this problem. It has a lot of advantages but needs to consider the feasibility of its using in each individual case.

Objective. The calculation of material balance of the proposed scheme allows us to determine the all ions concentrations and flows (volume) of water at all stages of the process.

Methods. The filtration process of a nitrate solution or natural water with previously added reagent was carried out in the two direct flow laboratory cell: for nano-and ultrafiltration.

Results. Obtained formulas allow easily calculate all the volumes and concentrations and make conclusions about the expediency of the scheme in each case. The experimental verification of the proposed scheme for purification the natural water from an underground source, where the nitrate concentration was 105 mg/dm3, proved the its effectiveness for the selective removal of nitrate ions from natural water.

Conclusions. The obtained material balance allows us to estimate the feasibility of practical implementation of the two-stage process flowsheet for the nitrate removal from natural water using baromembrane methods and to control the purification process on each stage. The prospects of the scheme is in the solving the important environmental problem which concerns the purification of the natural water with high level of nitrate.

Keywords


Nitrate ions; Natural water; Removal; Nanofiltration; Ultrafiltration; Polyhexametylenguanidyn

References


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GOST Style Citations


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DOI: https://doi.org/10.20535/1810-0546.2015.5.65073

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