WATER CONDITIONING FOR FOOD INDUSTRY USES

 

 

RAISA NASTAS , V.RUSU, T.LUPASCU, LUDMILA STARIS, MARIA SANDU
 

 

 

ABSTRACT. – Water conditioning for food industry uses. Tap (drinking) water from many localities of Moldova doesn’t always correspond to the “Sanitary standards for drinking water quality” or to the requirements of the “Regulation for non-alcoholic beverages”, requiring the need for additional purification/ conditioning. This paper presents research regarding the removal/adsorption of the main pollutants in tap water (iron, manganese, aluminum, humic substances, trihalomethanes) on supports of local carbon adsorbents made from vegetable products (stones of peach and plum, walnut shells). Experiments were performed in dynamic conditions in columns of carbon adsorbents. As work solutions was used tap water where pollutants have been introduced in amounts equivalent to 3 maximum allowable concentrations. Carbonaceous adsorbents used for removal/adsorption of pollutants in dynamic conditions, reveal a capacity of up to 1:400 volumes adsorbent: solution before breakthrough. Combined filter, utilizing active carbons, was constructed and tested for conditioning of tap water for beverage and food production. The results demonstrated efficient remove of organic substances and heavy metals by filtering of about 700 volumes of water per volume of filter.

Keywords: drinking water quality, active carbons, absorption, organic substances, heavy metals.
 

 

FULL TEXT