Original scientific paper
INVESTIGATION ON THE EFFICACY OF WASTEWATER MANAGEMENT UNITS ON A PIG FARM
Gergana Kostadinova
; Faculty of Agriculture, Trakia University, Stara Zagora, Bulgaria
Georgi Petkov
; Faculty of Agriculture, Trakia University, Stara Zagora, Bulgaria
Vera Barakova
; Faculty of Agriculture, Trakia University, Stara Zagora, Bulgaria
Rodne Nastova-Gjorgjioska
; University Ss. Cyril and Methodius, Skopje, Macedonia
Goce Cilev
; University Ss. Cyril and Methodius, Skopje, Macedonia
Abstract
The efficacy of a waste management unit with mechanical and biological separation steps was evaluated with regard to decontamination of effluents (mixture of manure, urine and technological water) on a pig farm with capacity of 5,500 pigs using parameters included in the national ecological legislation. It was established that: - The highest concentrations of analyzed parameters in farm effluents (BOD5, total solids, total nitrogen, total phosphorus, total fats) were measured between 8.00 and 10.00 AM, as compared to the other hours of the day. - The waste management units exhibited a low efficacy of purification as followed: in the BOD5 test: 50.5% – 52.2 %; total solids: 67.9 – 68.3 %; total nitrogen: 13.9 – 16.6 %; total phosphorus: 10.1 – 10.4 % ; total fats: 71.2 – 72.2 %. - Wastewaters exceeded the reference quality limits for the various parameters as followed: for BOD5 (upper limit <400 mg/l) 1.8 times; total solids (upper limit <200 mg/l) – 5.18 times; total nitrogen (upper limit <35 mg/l) – 7.4 times; total phosphorus (upper limit <15 mg/l) – 1.8 times. Only the fats content was within the reference range (upper limit <120 mg/l).
Keywords
pig farm; wastewater; waste management units; parameters; quality; ecological evaluation
Hrčak ID:
52192
URI
Publication date:
15.1.2010.
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