International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 11 Issue: 05 | May 2024
www.irjet.net
p-ISSN: 2395-0072
Treatment of Wastewater collected from Automobile Service station using Sawdust as Adsorbent Varsha K 1, Sheena K N2 1 PG student, Environmental engineering in Department of Civil Engineering, M-Dasan Institute of Technology
Ulliyeri, Kerala, India
2 Assistant Professor, Department of Civil Engineering, M-Dasan Institute of Technology Ulliyeri, Kerala, India
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Abstract – The main aim of the experimental study is to
natural porosity of the soil and clogs the pores on the surface of ground and it resists the downward percolation of the rainwater which recharge underground water system. The service station wastewater contains high concentrations of oil and grease and many other impurities, therefore proper treatment prior to discharge is required. The wastewater from service station is mainly from the carwash activities they perform. The present study focuses on the effect of saw dust activated carbon in treating service station wastewater by conducting batch adsorption and column adsorption study.
compare the efficiency of sawdust activated carbon in treating service station wastewater in both batch and column adsorption method. The parameters like oil and grease, turbidity, chloride, Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD) are effectively reducing in both batch and column adsorption method. Batch study was conducted by taking adsorbent dosage as a variable parameter. Sawdust was added into wastewater In the order of 2g, 4g, 6g, 8g, 10g respectively for a contact time of 60 min in the batch adsorption study. column adsorption study was performed by taking flow rate and contact time as a variable parameter. Flow rate was varied as 10 ml/min, 8 ml/min, 6ml/min, 4ml/min, 2ml/min respectively. Contact time was varied in the order of 20 min, 40 min, 60 min, 80 min, 100 min. The maximum removal efficiency was obtained at 6g of adsorbent for 60 min contact time in batch adsorption study. The maximum removal efficiency was obtained at a flow rate of 6ml/min for a contact time of 60 min in column adsorption study. This work shows sawdust activated carbon as an effective adsorbent in treating service station wastewater.
2. MATERIALS AND METHODOLOGY The adsorbent used for the treatment of wastewater collected from service station is the chemically activated sawdust for the better removal of oil and grease from the wastewater. Sawdust is the waste material generated by wood-based industries. Dumping of sawdust is also a threat to natural environment so by using sawdust oil and grease can be removed from the service station wastewater. Exposure to excessive amount of wood dust may irritate the eyes, nose and throat.
Key Words: Adsorbent dosage, sawdust, service station wastewater, batch adsorption study, column adsorption study.
1.INTRODUCTION Water pollution because of discharging untreated oil and greasy water directly into water source is a great threat to environmental pollution and can kill aquatic organism both plants and animals. Water is the most important resource and due to increased concern for the future of today’s water supplies humans have been forced to develop new technologies to protect these bodies of water from contamination. Industrial growth and discharge of wastewater directly to surface water stream has increased the level of pollutants in water this is one of the major concerns of mankind. The main problem of the service station is that the disposal of wastewater is not done accurately especially in the case of small and not so well-equipped service station releases the wash water directly into streams or into ground. The water released into ground which have oil and grease suffocate the
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Fig -1: Sawdust The waste sawdust was first washed to remove dirt and then dried, crushed and sieved sawdust was passed through 2.54 mm sieve. 5gm of sieved sawdust was mixed with 250 ml of 0.1M NaOH and stirred. Sawdust was then separated using 0.075mm sieve, and rinsed with 2 L of distilled water. This procedure was repeated twice to ensure removal of base from sawdust. The purified sawdust was then mixed with 0.1 M of sulfuric acid for a period of 24 hours and later dried. Then filtered after
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