Studies on Feasibility of Reverse Osmosis (Membrane) Technology for Treatment of Tannery Wastewater

Kuppusamy Ranganathan, Shreedevi D. Kabadgi

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DOI: 10.4236/jep.2011.21004                

Abstract

Tanneries reusing wastewater by combination of conventional and advanced Reverse Osmosis (RO) treatment technologies were assessed for technical and economic viabilities. Conventional treatment methods such as neutralization, clari-flocculation and biological processes are followed to clean the effluents before feeding to RO membrane modules. The characteristics of untreated composite effluents such as pH, biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), total dissolved solids (TDS), and total chromium were in the range of 4.00-4.60, 680-3600 mg/L, 1698-7546 mg/L, 980-1480 mg/L, 4200-14500 mg/L, and 26.4-190 mg/L, respectively. Inorganic ions like Ca2+, Na+, Cl– and SO42– were found more in the wastewaters. Conventional treatments significantly removed the organic pollutants however failed to remove dissolved inorganic salts. Membrane technology removed the salts as well as remaining organic pollutants and the product water is reused in the process. The studied tanneries (5 numbers) have achieved 93-98%, 92-99% and 91-96% removal of TDS, sodium and chloride, respectively. Seventy to eighty five percentage of wastewater was recovered and recycled in the industrial processes. The rejects are subject to either solar evaporation system or Multiple Effect Evaporation (MEE) technology. The resulting salts are collected in polythene bags and disposed into scientifically managed secured land fill (SLF) site. The cost of wastewater treatment for operation and maintenances of RO including the pre-treatments (conventional methods) is INR 100-110 m-3.

Keywords

Reverse Osmosis (RO), Membrane Technology, Recycling, Tannery Waste Water

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	T. S. Ramasami, S. Rajamani and J. R. Rao, “Pollution Control in Leather Industry: Emerging Technical Options,” Central Leather Research Institute, Adyar, Madras, 1995.
[2]	A. S. Naidu, “Indian Leather Industry in 21st Century: Challenges and Opportunities,” Yojana, 13th March, 2000.
[3]	R. Krishnaswamy and G. Haridas, “Ground Water Pollution by Tanneries in Tamil Nadu (India),” In: W. Van Duijvenbooden, P. Glasbergen and H. Van Lelyveld, Eds., Proceedings of International Symposium on Quality of Ground Water, Noordwijkerhout, the Netherlands, 1981, pp 287-290. doi:10.1016/S0166-1116(08)71917-4
[4]	C. P. Gupta, M. Thangarajan, V. V. S. Gurunadha Rao, M. Ramachandra and M. R. K. Sarma, “Preliminary Study of Ground Water Pollution in the Upper Palar Basin and Feasibility of Mass Transport Modeling to Predict Pollutant Migration,” National Geophysical Research Institute (NGRI) Tech Report, No. 94-GW-168, 1994, pp 45.
[5]	V. V. S. Gurunadha Rao and M. Thangarajan, “Ground Water Pollution Due to Discharge of Tannery Effluents in Upper Palar Basin, Tamil Nadu, India: An Assessment through Mass Transport Modeling,” Environmental Engg and Policy, Vol. 1, No. 4, 1999, pp 201-208. doi:10.1007/s100220050023
[6]	V. Tare, S. Gupta and P. Bose, “Case Studies on Biological Treatment of Tannery Effluents in India”. Air & Waste Management Association, Vol. 53, 2003, pp. 976-982.
[7]	Z. Song, C. J. Williams and R. G. J. Edyvean, “Tannery Wastewater Treatment Using an Up-Flow Anaerobic Fixed and Biofilm Reactor (UAFBR),” Environmental Engineering Science, Vol. 20, No. 6, 2003, 587-599. doi:10.1089/109287503770736104
[8]	S. M. Contreras-Ramos, D. Alvarez-Bernal, Trujillo- Tapia and L. Dendooven, “Composting of Tannery Effluent with Cow Manure and Wheat Straw,” Bioresource Technology, Vol. 94, No. 2, 2004, pp. 223-228.
[9]	A. Hafez, M. S. E. Manharwwy and M. A. Khedr, “RO Membrane Removal of Unreacted Chromium from Spent Tanning Effluent. A Pilot Scale Study, Part 2,” Desalination, Vol. 144, 2002, pp. 237-242. doi:10.1016/S0011-9164(02)00318-1
[10]	A. Hafez and M. S. E. Manharwwy, “Design and Performance of Two-Stage/Two Pass RO Membrane System for Chromium Removal from Tannery Wastewater. Part 3,” Desalination, Vol. 165, 2004, pp. 141-151.
[11]	O. Lefebvre, N. Vasudevan, M. Torrijos, K. Thanasekaran and R. Moletta, “Halophilic Biological Treatment of Tannery Soak Liquor in a Sequencing Batch Reactor,” Water Research, Vol. 39, No.8, 2005, pp. 1471-1480. doi:10.1016/j.watres.2004.12.038
[12]	S. Rajamani, T. S. Ramasami, J. S. A. Langerwerf and J. E. Schappman, “Environmental Management in Tanneries-Feasible Chromium Recovery and Reuse System,” In: International Conference on Appropriate Waste Management Technology for Developing Countries, Nagpur, India, 1995, pp. 965.
[13]	APHA, “Standard Methods for the Examination of Water and Wastewater,” 20th Ed., American Public Health Association, Washington DC, USA, India, 1998.
[14]	CPCB, “Laboratory Manual for Analysis of Samples,” Central Pollution Control Board, Delhi, 2001.
[15]	W.G. Scholz, P. Rouge, A. Bodalo and U. Leitz, “Desalination of Mixed Tannery Effluent with Membrane Bioreactor and Reverse Osmosis Treatment,” Environmental Science & Technology, Vol. 39, No. 21, 2005, pp. 8505- 8511. doi:10.1021/es050330p