Comparison of Efficiency of Different Type Systems for Wastewater Treatment
Analele Universităţii din Oradea, Fascicula Protecţia Mediului - Vol. XXI, 2013
10 Pages Posted: 18 Nov 2015
Date Written: November 17, 2014
This study has the purpose to evaluate the efficiency of different waste water treatment plant. The following wastewater treatment systems were studied: activated sludge, plant, physicochemical treatment, biodisc and biofilter. Waste water samples were collected from treatment units and analysed for the major water quality parameters, such as biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), total nitrogen (Nt) and phosphorus (Pt). The efficiency of each unit in treating the pollutants was calculated. In this paper we found that from the four types of municipal waste water treatment systems activated sludge basins have provided most removal efficiency BOD5 (92.09%) and phosphorus (87.41%). Municipal wastewater treatment efficiency for biodisc had the highest values for the parameters TSS (96.9%),% COD (91.6), NT (93.5%), but treatment efficiency for phosphorus removal (60.5%) was below the legal limit recommended (Directive 98/15/EEC). The maximum removal of phosphorus was for activated sludge plant (87,41%) and minimum removal efficiency was 13,3% for biofilters. For nitrogen, the higher efficiency was obtanined in biodiscs tehnology (93,5%) and the physico-chemical tehnology.had the lowest efficiency. (1,2%).
Keywords: waste water treatment plant (WWTP), biodisc, biofilter, physico-chemical treatment, activated sludge, efficiency
JEL Classification: A10
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