Naniek, Ratni JAR and Anas , Zubair (2011) DETERMINATION OF TOXICITY WASTE WATER TO NILAFISH (ORECHROMIS NILOTICUS). In: Bali Internasional Seminar on science and technology 2011, 22-23 july 2011, Bali.

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    Waste water of Tofu industry is known containing organic matter and suspended particles that were relatively high and directy discharged into receiving water bodies that it is a potential caouse of pollution. Direct disposal of this waste can cause a decrease in dissolved oxygen, increasing turbidity and temperature and lowering the pH and even causing death of aquatic. Biota. The indicator of water pollution is the death of fish in t he water bodies. Death can occur because of the damage to the fish gills coused by highly suspended particles in the wastewater of tofu industry. The emergence of environmetal pollution is sometimes difficult to identify but there are models of how to get warning of polluted water environment, by determining the level of toxicity of waste, known as Lethal Concentration (LC 50). The benefit of knowing LC 50 can used the maximum limit toxicant standard for environmetal conservation of river water. The purposes of this study were to determine the level of acute toxicity or Lethal Concetration (LC 50) of industrial liquid waste to the biota of the river, nila fish (Oreachromis Niloticus), and the effects of suspended particles in a liquid industrial waste on the structure of Nila fish (Oreochromis Niloticus) gills toxicity test with 4 day exposure time using tilapia. The variation of concentrage on the toxicity test results was obtained through a test range of toxicant volume percentage of 16%,17%,18% and 19%. Results was obtained with LC 50 volues of COD 1020 mg/l and TSS 1280 mg/I is 17%. With the volue of LC 50 it is known that untreated effluent is acutely toxic. Through the test of histopathology of fish gills, it is known that liquid waste is processed do not know which cause changes in the structure of fish gills in the form of hyperplasia. Keywords : Toxicity, Waste water of Tofu industry , Nila fish.

    Item Type: Conference or Workshop Item (Paper)
    Subjects: T Technology > TD Environmental technology. Sanitary engineering > TD201 Water supply for domestic and industrial purposes > TD429 Water purification. Water treatment and conditioning. Saline
    Divisions: Conference/Seminar > Bali International Seminar on science and technology
    Depositing User: Users 8 not found.
    Date Deposited: 27 Jan 2014 15:25
    Last Modified: 27 Jan 2014 15:25

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