Evaluation of the efficiency of ozone treatment on wastewater in the battery plant.

Abstract

Wastewater discharge battery manufacturing plant, the process of water treatment and the contamination of ion solution lead (Pb²⁺) does not exceed the standards act. Although the contaminations of ion solution lead (Pb²⁺) will pass a standard by law. But there will also be the contamination of ion solution lead (Pb²⁺). Wastewater treatment by chemicals cannot to reduce the contamination of ion solution lead (Pb²⁺) up until the zero. The contamination of the main pollutants 2 as there is contamination of ion solution lead (Pb²⁺) and the contamination of sulfuric acid (H₂SO₄) with water. Therefore, the system wastewater treatment to use chemical with high alkalinity condition, such as sodium hydroxide (NaOH) to adjust the value pH of wastewater and cause precipitation with other processes. But because the water through the treatment process with chemical also value the contamination of ion solution's lead (Pb²⁺) is one of the values, that a chemical treatment system cannot reduce ion solution lead (Pb^{2 +}) up until the zero. Ozone (O₃) when dissolution is one oxygen atom, which is unstable according to equation O₃ ---- > O₂. + 2e .  Oxygen ionization is sensitive to react violently with oxidizing solution ion heavy metals. Therefore, the ozone to experiment in optimization of wastewater treatment. So the contamination pollutant mixed with wastewater to zero, or to a minimum to help protect the environment. The experiment showed that the ozone has the ability to oxidize lead ions in solution (Pb²⁺) Change is PbO_(s). So wastewater treatment by ozone can help to reduce contamination of ion solution lead. (Pb^{2 +}) in released from the factory. The results from the experiment to test the relationship between. Increasing the amount of ozone concentration, and time constant 30 min. Quantity ion solution lead (Pb²⁺) reduced translation inversion with increasing the concentration of ozone. R² = 0.840 and adding time ozone contact with wastewater concentration at ozone constant 300 mgO₃ /hr quantity ion solution lead (Pb²⁺) reduced translation inversion follow increase to contact time. R² = 0.872   which show that ozone can oxidize ion solution lead (Pb²⁺) is PbO _(s) very good, seen from the value R² of results from the experiment of  a good level.