#TITLE_ALTERNATIVE#

• Main Author: MAGDALENA (NIM 15304041), YULIA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/11670
• Institution: Institut Teknologi Bandung

Fast growing developments in industrial sector nowadays need to be competed environmental control and monitoring due to its damaging potential ti the environmental components and the chances of worsening the environment conditions. Monitoring aquatic environments are not only by its physical, chemical, dan biological aspects but also from the toxicity aspects.<p>PT. X is one industry that has enforced the efforts environmental pollution preventions through Wastewater Treatment Plant (WWTP). However, it is not known yet the toxicity level of PT. X wastewater which later comes out to the receiving water body. The purpose of this research is to determine toxicity level of wastewater of PT. X by using organism test Daphnia magna. Through 96 hours toxicity test and analysis using Probit method, it is found that the influent of PT. X WWTP is categorized as toxic with 0,838% of LC50 96 hours for the first sampling (PS I) and 0,4415% for the second sampling (PS II). Meanwhile the effluent is known to be non-toxic against Daphnia magna with 182.1735% of LC50 for the first sampling, but the effluent at the second sampling is known to be toxic against Daphnia magna with 33,373% of LC50. BOD concentrations of the influent on PS I and PS II are 3825,95 mg/L and 4403,72 mg/L meanwhile COD concentrations are 13248 mg/L and 16560 mg/L, concentrations of Cu, Zn, Cd, Pb and Ni consecutively 3,02 mg/L, 97,44 mg/L, < 0,003 mg/L, 101,6 mg/L, 58,03 mg/L for PS I and 2,65 mg/L, 124,24 mg/L, < 0,003 mg/L, 2,5 mg/L, 3,58 mg/L for PS II. BOD concentrations of the effluent on PS I and PS II are 10,10 mg/L and 19,90 mg/L along with COD concentrations 18,4 mg/L and 60 mg/L. In the mean time concentrations of Cu, Zn, Pb, Ni, Cd consecutively 0,29 mg/L, 1,18 mg/L, < 0,003 mg/L, < 0,05 mg/L, 0,89 mg/L for PS I and 0,55 mg/L, 1,74 mg/L, < 0,003 mg/L, < 0,05 mg/L, 0,99 mg/L for PS II. According to the results, it is concluded that wastewater of PT. X has not reached the quality standard that has been ruled throughly. This shows that WWTP process of PT. X is not yet optimum. <br />