Harmanjot Kaur Sandhu

Kharar, sub-division near SAS nagar, has a drainage that collects waste water from various domestic and industrial sources. The water is highly polluted as evident from initial characterization (TS- 12000 ppm, Hardness- 1600 ppm, Alkalinity- 1450 ppm, BOD- 1500 ppm and COD- 3000 ppm). Water samples also had heavy metal content like Zn (1.5 ppm), Ni (0.75 ppm), Cr (3 ppm). Such highly polluted water can’t be reused for any domestic, agricultural and industrial purpose. Two different Activated Carbons (AC), Bottle palm activated carbon (BPAC) and Eucalyptus Bark Activated Carbon (EBAC) were analyzed for their ability to treat waste water from Kharar drainage. Activation of raw carbon was done by using combination of sulfuric acid and high temperature of 150 ⁰C in stepwise procedure. Various treatment parameters were optimized separately for two types of activated carbons like Adsorbent dosage, contact time, pH and agitation speed. Using optimized parameters batch of 100 ml sample was treated with BPAC and EBAC. BPAC treated effluent to 88% at dose of 4g/25 ml, at pH 8 and 100 rpm shaking speed for time period of 60 minutes whereas, EBAC treated water to 83% at dosage of 5g/25 ml at pH 6, 100 rpm shaking speed for time period of 90 minutes. Final Characterization of treated water was done to analyze extent of removal of individual pollutant. With BPAC, Hardness and TS content were removed to more than 90%. BOD was reduced to 70%, however COD was removed to 66.6%. Heavy metal removal also occurred. EBAC showed little lesser treatment as compared to BPAC but, still both adsorbents were efficient in waste water treatment and could be potential natural part of waste water cleansing technology.

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