Nowadays wastewater is the threat to the environment. There are many source of wastewater. Among them tannery industry is an important source. Various types of chemicals used in tannery industry are liable for the water pollution that makes the river water unfit to the aquatic lives. These river water mingled with wastewater is again supplied in many cities for drinking water by treatment process. Chlorination process for the water treatment is very popular but it does not recede the heavy metals from the wastewater completely. In addition to it there is produced the cancer genic Threehelometens compound for long-term chlorination treatment. These problems can be easily overcome using ozonized gas. For the purpose, it has been designed and implemented a new rectangular shaped type Ozonizer based on silent discharge and surface discharge operation following streamer breakdown principal in our laboratory. The ozonized gas produced from the oxygen gas at first time and then air supplied by air blowerhas been used to dwindle the heavy metals lead (Pb), chromium (Cr) and copper (Cu). Using Flame Atomic Absorption Spectrometry Technique, the amounts of heavy metals in the Tannery wastewater have been measured 0. 25 [mg/L], 16. 18 [mg/L[ and 0. 04 [mg/L] before treatment and 0. 14 [mg/L], 3. 89 [mg/L] and 0. 03 [mg/L] after treatment for the lead, chromium and copper successively. The decreasing amounts of the lead, chromium and copper in the wastewater have also measured by 44 %, 76 % and 25 % successively.

Flame Atomic Absorption Spectrometry Ozonizer Silent discharge Surface discharge Streamer breakdown Tannery Wastewater