| dc.description.abstract | Yogyakarta Special Region is famous as a batik producing area. One of the batik
industrial areas in DIY is in the Bantul area. Making batik consists of several
stages, namely drawing the design, pasting, colouring and polishing. This stage
contributes to suspended solids in waters such as BOD and COD. Apart from that,
the batik industry produces quite large amounts of liquid waste. This waste consists
of organic and inorganic waste which can change all or part of the physical,
biological, and chemical characteristics. This study aimed to determine the acute
value of PT batik industry wastewater. X using method Whole Effluent Toxicity
(WET). Zebra fish (Danio rerio) were used as test animals with treatment starting
from the acclimatization process, preliminary tests, and acute toxicity tests which
were exposed for 96 hours. The results of the analysis of effluent characteristics
show that there are two parameters that exceed the quality standards according to
DIY Regional Regulation No. 7 of 2016 concerning Wastewater Quality Standards
for Batik Business and/or Industrial Activities, namely total chrome (Cr) and
phenol. LC value50 obtained through calculations using the Spearman-Karber
analysis method. After carrying out an acute toxicity test, the Batik Industry
wastewater produced an LC value50 influent is 85.35 with a TUa of 1.17 while
effluent does not have LC50 because it does not cause the death of test animals. | en_US |
