Author: Mehmet Emin AYDIN, Gülnihal KARA
Publishing Date: 2006
Volume 21 Issue 3_4
In this work, wastewater samples were taken from the sewerage system of Konya I st. Organized Industrial Zone and 72 hours toxicity tests were carried out. Toxicity levels of wastewater samples were determined employing fish biyoanalysis in terms of LC50 which is the concentration that kills 50 % of the test organisms in 72 hours and toxicity dilution factor (TDF). In addition phytotoxicity levels of waste waters were determined by employing terrestrial plant Lepidium Sativum (L. Sativum). As aquatic tests organism fresh water fish Lepistes Reticulates (L. Reticulates) was employed. As a result of this work toxicity dilution factors of waste waters were found within the acceptable range for discharging into sewerage system according to industrial wastewater discharge rules of Turkish Water Pollution Control Regulations. Result of phytotoxicity test was not determined as EC50 (concentration that effected 50 % of the test organisms in 72 hours), but for all of the sampling points determined as phytotoxic according to germination percent values. Values of Lepistes Reticulates and Lepidium Sativum as test organisms were also evaluated in terms of ease of application and reliability of the results.
Key Words: Toxicity tests; wastewater; phytotoxicity; fish toxicity test.