Science – Future of Lithuania / Mokslas – Lietuvos Ateitis, Vol 7, No 4 (2015)

Research of small house hold sewage treatment plant working

Ernesta Valeikaitė (Vilnius Gediminas Technical University, Lithuania)
Aušra Mažeikienė (Vilnius Gediminas Technical University, Lithuania)

Abstract


In Lithuania centralized municipal wastewater treatment technologies are applied quite effectively, but there is little evidence of the functioning of individual small wastewater treatment plants. The paper presents the small device AT-6, in the city of Vilnius, and the treated sewage results (BDS7, nitrate, ammonium, total nitrogen, total phosphorus and phosphate concentrations). Studies have shown that treated sewage indicators based on ammonium and nitrate ion concentrations are good. These substances are 2–10 times less than it can be in drinking water according to HN 24: 2003. Concentration of phosphates in the treated sewage ranged from 3.57 to 9.33 mg/L and exceeded the indicators, which were compared. The phosphorus environmental aspect is not dangerous, because treated sewage is not discharged into surface water bodies. Dealing from the pattern of biological indicators and enzymatic activity, the quality of activated sludge is good. Treated sewage does not impair the natural state.

Article in: Lithuanian

Article published: 2015-09-29

Keyword(s): sewage; small household device; biological treatment; BOD7; nitrate; ammonium; phosphate; activated sludge.

DOI: 10.3846/mla.2015.833

Full Text: PDF pdf

Science – Future of Lithuania / Mokslas – Lietuvos Ateitis ISSN 2029-2341, eISSN 2029-2252
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 License.