International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 05 | May 2023
p-ISSN: 2395-0072
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Treatment of Dairy Wastewater Using Saw dust as a Natural Low Cost Adsorbent Anaswara Unnikrishnan1, Sheena K. N2 1M.Tech student, Environmental Engineering in the Department of Civil Engineering 2M-Dasan Institute of Technology Ulliyeri, Kerala, India
3Assistant professor, Department of Civil Engineering, M- Dasan Institute of Technology Ulliyeri, Kerala, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract – The main aim of this experimental study is to
to develop new technologies to protect these bodies of water from contamination. Nowadays industrial growth creates environmental pollution and generates hazardous wastewater which is one of the major concerns for the mankind. The biggest problem due to the dairy industry is the disposal of wastewater which is not meeting the standards (Bharati.S. Shete et al.,2013). The dairy industry wastewater contains high concentrations of organic matter and therefore proper treatment prior to discharge is required. The dairy industry wastewater is generated primarily from the cleaning and washing operations in the milk processing plant which includes recovering product residues from the system, pre- rinse, detergent cycle, rinse, disinfectant cycle, potable water rinse. (N.P.Shinkar et al.,2013).Dairy process equipment cleaning is an essential aspect of dairy production. The milk collected through cooperatives goes through many channel containers and thus is highly susceptible to bacterial as well as dirt contamination. The present study focuses on the effect of saw dust activated carbon in treating dairy wastewater by conducting batch adsorption and column adsorption study.
compare the efficiency of saw dust activated carbon in treating dairy wastewater in both batch and column adsorption method. The parameters like turbidity, Total suspended solids, Total dissolved solids, Chloride, Biochemical oxygen demand(BOD), Chemical oxygen demand (COD) are effectively reducing in both batch and column adsorption method using saw dust activated carbon as an adsorbent. Batch study was conducted by taking adsorbent dosage as a variable parameter. Saw dust activated carbon was added into the dairy wastewater in the order of 20g, 40g, 60g, 80g and 100g 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 in the order of 10 ml/min, 8 ml/min, 6 ml/min, 4 ml/min and 2 ml/min respectively. Contact time was varied in the order of 20 min, 40 min, 60 min, 80 min and 100 min. The maximum removal efficiency was obtained at 60 g adsorbent dosage for 60 min contact time in batch adsorption study. The maximum removal efficiency was obtained at a flow rate of 6 ml/min for a contact time of 60 min in column adsorption study. Saw dust activated carbon showed a maximum removal efficiency of 76 %, 72 %, 65.8 %, 72.9 %, 62.9 % and 57.7 % for turbidity, total dissolved solids, total suspended solids, Chloride, Biochemical oxygen demand and Chemical oxygen demand respectively in batch adsorption study and 68.6 %, 64.5 %, 60.7 %, 67.2 %, 53.8 %, 57.9 % for turbidity, total dissolved solids, total suspended solids, chloride, biochemical oxygen demand and chemical oxygen demand respectively in column adsorption study. This work shows sawdust activated carbon as an effective adsorbent in treating dairy wastewater .
2.MATERIALS AND METHODOLOGY Saw dust is the waste material generated by wood based industries. It is formed as small irregular chips or small trash of wood during chopping of logs of wood into different sizes (Adeosun Jhonson et al.,2018).The dimension of saw dust depend on the varieties of wood and dimension of saw teeth. Dumping of saw dust on open land is posing threat to the environment. Therefore saw dust can be used as an adsorbent material to make water samples safe against almost all the physicochemical parameters but unsafe against bacteriological parameters. Though the saw dust adsorbent bring about the slight increase in the level of some elements in the water samples the contaminant level of those elements is still within the water quality guidelines. The surface charge of the sawdust and the electrostatic force between the adsorbent and the impurities may be responsible for the adsorption efficiency. Sawdust as a bio-waste of industry and agriculture has lots of applications in vast areas. A wood dust allergy can be characterized by sneezing,
Key Words: Dairy wastewater, Saw dust activated carbon, Adsorbents, Batch adsorption study, Column adsorption study
1.INTRODUCTION Water pollution has become one of the most serious problems in our society. Water is the most important resource and due to increased concern for the future of today’s water supplies humans have been forced
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