Experimental evaluation of a biological products' efficiency for high-load wastewater treatment

Abstract

Prior to discharge, high-loads wastewater needs intensive treatment, that can be carried out by physical, chemical or biological means towards discharge water quality. Extensive research has been carried out to identify solutions with reduced costs and high efficiencies. The paper presents the lab scale performance efficiencies of an innovative biological complex product obtained for the treatment of several samples (municipal wastewater, pig farm wastewater, wastewater from a restaurant’s grease removal tank). The experiments were carried out in laboratory bioreactors, the sample volume considered ranging from 1.5L to 4L depending on the waste water load and the number of simultaneous samples. Each sample was tested in parallel under similar conditions, the only varied parameter being the dissolved oxygen concentration. The results have shown that, under the tested conditions, the product contributes to pollutants degradation, with good efficiency for nitrogen ammonium and Kjeldahl nitrogen removal, managing to partially reduce the organic load. However, after 42 days of experiment, the effluent does not meet the sewage discharge conditions imposed by NTPA 002-H.G.352.