TOXICITY TESTING APPLIED TO WASTEWATER TREATMENT

Yıl 2017, Cilt: Volume 2 Sayı: İssue 1 (1) - 2.İnternational Congress Of Forensic Toxicology, 243 - 243, 16.02.2017

Gökçe Didar Değermencı

Öz

Population
growth and increasing water consumption result in problems related to water
throughout the world. Therefore, the number of the studies on the re-use of
purified water and meeting the discharge limits has recently increased. While
the purified industrial and domestic wastewaters are being discharged into the
receiving environment, they should not contain micro-pollutants such as drugs,
pesticides and especially chemicals leading to endocrine disorders and
discharge limits should be met. These micro-pollutants lead to disruptions in
the ecology of the aquatic and terrestrial environment. In recent years,
toxicity tests have been implemented and bio-monitoring has been performed in
order to determine the pollution parameters. The main aims of the toxicity
tests are to determine harmless concentrations on the living creatures and to
detect the quality of the surface waters or the level of toxicity of the
pollution discharged. The studies aiming at determining the toxic effects of
waste waters are conducted in consideration of their short-term and long-term
effects on the freshwater (Selenastrum capricornutum) and saltwater (Artemia
salina) algae, invertebrates (Dapnia magna) and fish (Mysidopsis bahia) so as
to obtain results swiftly and to achieve favourable operating costs. Acute
toxicity is the toxic substance dose (LD50) or concentration (LC50) needed for
killing at least 50% of the experiment organisms or the median effective
concentration (EC50) sufficient for immobilizing them. Such test kits as
Microtox, Biotox, Lumistox and Toxalert and respirometric measurements are also
commonly used. European Union countries discharge their domestic and industrial
wastewaters into the receiving environment in line with the toxicity limit
values in order to protect their existing resources. In our country, toxicity measurement
limit values should be added to the discharge limits.

Anahtar Kelimeler

TOXICITY TESTING APPLIED TO WASTEWATER TREATMENT

Kaynakça

• Gökçe Didar DEĞERMENCI
• Kastamonu University, Faculty of Engineering and Architecture, Department of Environmental Engineering, 37200, Kastamonu