On the degradation of metformin and carbamazepine residues in sewage sludge compost
Laen...
Kuupäev
2018
Kättesaadav alates
Autorid
Haiba, Egge
Nei, Lembit
Herodes, Koit
Ivask, Mari
Lillenberg, Merike
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Recent decades have shown intensive studies devoted to the fate of pharmaceuticals in
the environment. These studies have involved the development of
analytical tools, determination
of pharmaceuticals in different compartments, composting technologies, and plant uptake of
pharmaceuticals. The presence of organic pollutants in sewage sludge, including
pharmaceuticals, is a problem of major concern. The r
e
-
use of sewage sludge should be
encouraged since it represents a long
-
term solution provided that the quality of the sludge re
-
used
is compatible with public health and environmental protection requirements. Composting is a
widely recognized way of making
the soil application of sewage sludge safer.
In this study, the impact of sewage sludge composting on the degradation of metformin (MET),
by far the most often prescribed antidiabetic drug worldwide,
and carbamazepine (CBZ), a
poorly
biodegradable but
wid
ely used as an anticonvulsant drug to cure depression and seizures,
were
analysed. The anaerobically digested and dewatered sewage sludge samples were collected from
municipal wastewater treatment plant. Composting experiments were performed under fixed
co
nditions during 30 days. The results of the experiment showed that during a 1
-
month
composting period more than 90% of MET residues degraded, but no degradation of CBZ took
place during the composting period. The half
-
life of MET was 3 days for the compost
mixture
with the ratios of 1:3 and 1:2 (v:v). The results of this study show that composting maylead to the
efficient degradation of MET, whereas for the elimination of CBZ from sewage sludge different means should be used.
Kirjeldus
Article
Märksõnad
sewage sludge compost, sawdust, fertilizers, metformin, arbamazepine, articles