NEW COAGULANTS FOR TREATMENT OF PIGGERY WASTE-WATER

Abstract

The paper presents results of initial studies on possibilities of replacement of aluminium sulphate usually applied as a piggery wastewater coagulant by the new reactants. Research works were initiated by the fact that imported aluminium oxide is commonly used as a raw material to produce aluminium sulphate. The new reactants are manufactured from clay existing in the country and existent in large amount waste sulfuric acids after methyl methacrylate production. These new coagulants have a mixture of aluminium and ferric compounds acting as coagulant as well as active silica and carbonized organic compounds acting as adsorbent. Occurence of different amount of acid ammonium sulphate and of little amount of organic substance /below 2%/ in waste sulfuric acids requires not only determination of efectiveness of new reactants in comparison with aluminium sulphate but also determination of influence of new reactants on biological treatment of piggery wastewater. On the ground of initial laboratory studies was stated that employing twice bigger doses of new coagulants than aluminium sulphate it is possible to acquire the same effect of treatment.