Use this url to cite publication: https://hdl.handle.net/20.500.12259/84607
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Treatment of domestic wastewater by natural means
Type of publication
Straipsnis kitoje duomenų bazėje / Article in other database (S4)
Title
Treatment of domestic wastewater by natural means
Is part of
Research for Rural Development 2007: International scientific conference proceedings. Jelgava : Latvia university of agriculture, 2007
Date Issued
Date Issued |
---|
2007 |
Publisher
Jelgava : Latvia university of agriculture
Is Referenced by
Extent
p. 245-251
Field of Science
Abstract
On the basis of this research and the investigations of other authors (1992 - 2002), the paper presents the comparison of the treatment efficiency of domestic wastewater treatment facilities functioning by different natural means. From all the studied three natural wastewater treatment facilities, constructed wetlands are considered as most efficient for domestic wastewater treatment: here the removal of organic pollutants and biogenic compounds is 85-98% and 67-95% respectively. Biological ponds are most suitable for the treatment of domestic wastewater, the discharge and pollution of which is fluctuating within a wide range. However, such ponds do not always ensure the treatment until the allowable rates. Their treatment efficiency according to biochemical oxygen demand (BOD5) is 49.6%. Total nitrogen amount contained in wastewater outflow from the treatment facilities with biological ponds was on the average 22.2 mg lE-1. The biggest problem of those ponds is rather low P removal efficiency (only 29.5%). Therefore wastewater flowing out of the ponds needs additional treatment. The usage of subsoil filtration fields is limited because their arrangement requires light soils. When arranging the distribution pipeline below the freezing zone, in many places the requirement that the pipes must be 1 m above the maximum ground water level is violated. The pipes should be arranged in places where there is no recipient for treated wastewater outflow. The load of subsoil filtration fields should not exceed 300 m**3 haE-1 per month. From the economical point of view, domestic wastewater treatment facilities with flowing ponds require least expenses.
Type of document
type::text::journal::journal article::research article
Language
Anglų / English (en)
Coverage Spatial
Latvija / Latvia (LV)