| Title |
Influence of chlorides and sulphates on quality of biological wastewater treatment using enzyme preparations |
| Translation of Title |
Chloridų ir sulfatų įtaka biologinio nuotekų valymo kokybei naudojant fermentinį preparatą. |
| Authors |
Skaisgirienė, Audra ; Vaitiekūnas, Petras ; Zabukas, Vytenis |
| DOI |
10.3846/16486897.2004.9636825 |
| Full Text |
|
| Is Part of |
Journal of environmental engineering and landscape management.. Vilnius : Technika. 2004, vol. 12, no. 3, p. 91-95.. ISSN 1648-6897. eISSN 1822-4199 |
| Keywords [eng] |
enzymes ; biological wastewater treatment ; sulphates ; chlorides |
| Abstract [eng] |
The biological treatment method is widely used in Lithuania due to its high efficiency, low cost and suitability for treating various types of wastewater. After technological processes various mineral substances, such as chlorides and sulphates, get into water bodies. These substances are not removed from wastewater by the biological treatment method. The purpose of this study is to determine the concentrations of chlorides and sulphates, investigate the influence of enzyme preparations upon quality and energy consumption and assess energy changes in the trophic food chain during biological treatment. To analyse the mineral salt influence of the biooxidation process a series of laboratory tests was carried out: biochemical oxygen consumption (BOD), activated sludge concentration and other indexes. It is found experimentally that a 400 mg/l concentration of chlorides disarranges the activity of microorganisms, and at a 700 mg/l concentration active sludge is no longer suitable for biological treatment. Also, we investigated the effect of a ferment preparation “Roebic” on effluence of sewage treatment. In a tank with an enzyme the total amount of energy after treatment increases by 5–30 %. It is determined by calculating the accumulation of energy in an active-sludge system that an enzyme preparation increases the energy levels of the system. |
| Published |
Vilnius : Technika |
| Type |
Journal article |
| Language |
English |
| Publication date |
2004 |
| CC license |
|
