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Title: Analysis and assessment of biological treatment processes in a small-scale wastewater treatment plant
Authors: Mažeikienė, Aušra
Vaiškūnaitė, Rasa
Keywords: wastewater
treatment plant
small
individual
activated sludge
Issue Date: 2018
Publisher: HARD Publishing Company
Citation: Mažeikienė, A.; Vaiškūnaitė, R. 2018. Analysis and assessment of biological treatment processes in a small-scale wastewater treatment plant, Polish journal of environmental studies 27(4): 1629–1637
Series/Report no.: 27;4
Abstract: With stricter requirements for wastewater treatment, small-scale individual wastewater treatment plants can provide a financially attractive alternative to a sever connection in locations far from the existing sewer network. Systems operating under the basis of active sludge are considered advanced, and their producers declare high levels of wastewater treatment not only according to BOD, but also under biogenic materials. However, there are hardly any data on how small-scale individual household wastewater treatment facilities operate. This article presents an analysis of the main parameters of wastewater biologically treated in three small-scale household wastewater treatment plants (which operate under the basis of active sludge), namely TSS, COD, BOD7, Nt, NO3-N, NH4-N, Pt, and PO4-P concentrations. The research lasted for 5.5 months during a cold period. According to TSS, COD, and BOD7 concentrations in effluent, the wastewater treatment level in the study plants was good. The concentrations of these substances in effluent (TSS<10 mg/L, COD<98 mg/L, BOD7<20 mg/L) were lower than requirements for treated water. However, NH4-N in the effluent in winter increased up to 6-7 mg/L and to 26 mg/L. The concentrations of Nt and Pt in treated wastewater exceeded EU requirements for water released from wastewater treatment facilities. PO4-P removal, in many cases, was ineffective or did not take place at all.
URI: http://dspace.vgtu.lt/handle/1/3638
ISSN: 1230-1485
Appears in Collections:Moksliniai straipsniai / Research articles

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