Open AccessRESEARCH OF SMALL HOUSE HOLD SEWAGE TREATMENT PLANT WORKING / MAŽO BUITINIŲ NUOTEKŲ VALYMO ĮRENGINIO DARBO TYRIMAI
Author(s) -
Ernesta Valeikaitė,
Aušra Mažeikienė
Publication year - 2015
Publication title -
mokslas - lietuvos ateitis
Language(s) - English
Resource type - Journals
eISSN - 2029-2341
pISSN - 2029-2252
DOI - 10.3846/mla.2015.833
Subject(s) - sewage , phosphorus , chemistry , sewage treatment , zoology , environmental chemistry , ammonium , nitrate , sewage sludge , wastewater , phosphate , environmental science , environmental engineering , biology , biochemistry , organic chemistry
\udIn 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