Prospects of Domestic Wastewater Treatment for Small Settlements in Northeastern Hungary
Zoltán Veres, Nóra Bence, Gyula Lakatos
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Department of Ecology, University of Debrecen, Egyetem tér 1., Debrecen, Hungary
Pol. J. Environ. Stud. 2015;24(3):1451–1456
In our study 14 wastewater treatment plants were investigated in Szabolcs-Szatmár-Bereg County in northeastern Hungary. The size of the plants varied between 150 and 8,500 m3/day capacity. The treatment efficiencies were compared using parameters of COD, BOD5, TN, and TP. Average C:N:P ratio of 50:9:1 suppressed nitrogen removal. Phosphorus removal was achieved with iron salt addition. The amount of daily influent was an appropriate scale to distinguish the technologies. SBR system efficiencies were negatively correlated with the amount of influent, which made them sufficient for small settlements. In the conventional aeration activated sludge technology full potential was only triggered in larger sized plants.