Abstract
Preliminary testing of dissolved air flotation (DAF) for wastewater treatment is presented. A combined coagulation-flocculation/DAF column system is used to remove oil and 60Co from nuclear industry wastewater. In this work, operational conditions and coagulant/flocculant concentrations are optimized by varying pH. Determinations of air-solids ratio (G/S), retention time (θ), pressure (P), volume of depressurized air–water mixture (V), turbidity and 60Co concentrations are reported. The effect of the treatment on the efficiency of separation of oily residues is also discussed. The results establish that the coagulant/flocculant system, formed by a modified polyamine (25 mgL−1) and a slightly cationic polyacrylamide (1.5 mgL−1), under specific operational conditions (pH = 7, mixing intensity Im1 = 300 s−1 and Im2 = 30 s−1), allowed the destabilization of colloidal matter, resulting in resistant flocs. It was concluded that by using G/S = 0.3, θ = 15 min, P = 620 kPa and V = 0.0012 m3, the greatest percentage removals of oil, turbidity, total cobalt and 60Co were obtained. These preliminary results then show that dissolved air flotation represents a good alternative for treatment of nuclear industry wastewater contaminated with radionuclides.
Similar content being viewed by others
References
Ling K (2010) Can fresh founds jump-stars a U.S. nuclear renaissance? Two new reactor in Georgia will benefit from $ 8 billion in U.S. government backing. Scientific American online. Reprinted from Greenwire with permission from Environment & Energy Publishing, LLC
Flores-Espinosa RM, Ortiz-Oliveros HB, López R, Cisneros L, Balcázar M, Perusquía R (1999) Estudios cinéticos para optimizar los parámetros de operación de la descontaminación radiactiva de aceites gastados. International joint meeting. The role of nuclear power to mitigate climate change. Acapulco, Sociedad Nuclear Mexicana. Julio 18–21:97–112
International Atomic Energy Agency (2003) Combined methods for liquid radioactive waste treatment. International Atomic Energy Agency-Technical Document (IAEA-TECDOC-1336), Vienna
International Atomic Energy Agency (2002) Application of ion exchange processes for the treatment of radioactive waste and management of spent ion exchangers. Technical Reports Series No. 408. IAEA, Vienna
Mezhov EHA, Samatov AV, Troyanovsky LV (1990) Actinide and lanthanide extraction from nitric acid solutions by flotation. J Radioanal Nucl Chem 143:323–328
Beheir SHG, Aziz M, Shakir K (1993) Studies on the liquid–liquid extraction and ion and precipitate flotation of Co(II) with decanoic acid. J Radioanal Nucl Chem 174:13–22
Aziz M, Beheir SHG (1995) Studies on the liquid–liquid extraction and precipitate flotation of the second kind of Co(II) using 8-hydroxy quinoline. J Radioanal Nucl Chem 196:35–449
Downey DM, Narick CN, Cohen TA (1985) Flotation separation of hafnium(IV) from aqueous solutions. J Radioanal Nucl Chem 91(2):259–268
Aziz M, Beheir SHG (1995) Removal of 60Co and 134Cs from radioactive process waste water by flotation. J Radioanal Nucl Chem 191:53–66
NORMA Oficial Méxicana NOM-28-NUCL-2009 (2009) Manejo de desechos radiactivos en instalaciones radiactivas que utilizan fuentes abiertas, Diario Oficial Martes 4 de agosto de 2009
Bratby J, Morais G (1975) Saturators performance in dissolved air (pressure) flotation. Water Res 9:929–936
Edzwald J (1995) Principles and applications of dissolved air flotation. Water Sci Technol 31:1–23
Capps R, Matelli G, Bradford M (1993) Reduce oil and grease content in wastewater. Hydrocarbons Process 6:102–110
Bensadok K, Belkacem M, Nezzal G (2007) Treatment of cutting oil/water emulsion by coupling coagulation and dissolved air flotation. Desalination 206:440–448
Arora H, DeWolfe JR, Lee RG, Grubb TP (1995) Evaluation of dissolved air flotation process for water clarification and sludge thickening. Water Sci Technol 31:137–147
Al-Mutairi NZ, Al-Sharifi FA, Al-Shammari SB (2008) Evaluation study of slaughterhouse wastewater treatment plant including contact-assisted activated sludge and DAF. Desalination 225:167–175
Hall T, Pressdee J, Gregory R, Murray K (1995) Cryptosporidium removal during water treatment using dissolved air flotation. Water Sci Technol 31:125–135
Teixeira MR, Rosa MJ (2006) Comparing dissolved air flotation and conventional sedimentation to remove cynobacterial cells of Microcystis aeruginosa: Part 1: the key operating conditions. Sep Purif Technol 52:84–90
Rulyov NN (2008) New areas in the development of technology of purifying natural water of finely-dispersed lyophilic impurities by flocculation and flotation. J Water Chem Technol 30:224–240
Rodrigues RT, Rubio J (2007) DAF-dissolved air flotation: potential applications in the mining and mineral processing industry. Int J Miner Process 82:1–13
Stoica L, Filip D, Filip GH, Razvan A, Radulescu R (1998) Removal of 226Ra(II) from uranium mining and processing effluents. J Radioanal Nucl Chem 229:139–142
Macfarlane AL, Prestidge R, Farid MM, Chen JJ (2009) Dissolved air flotation: a novel approach to recovery of organosolv lignin. Chem Eng J 148:15–19
Sena RF, Tambosi JL, Genena AK, Moreira RFPM, Schoder HF, Jose HJ (2009) Treatment of meat industry wastewater using dissolved air flotation and advanced oxidation processes monitored by GC-MS and LC-MS. Chem Eng J 152:151–157
El-Diwani G, El-Ibiari NN, Hawash SI (2009) Treatment of hazardous wastewater contaminated by nitrocellulose. J Hazard Mater 167:830–834
Sudilovskiy PS, Kagramanov GG, Trushin AM, Kolesnikov VA (2007) Use of membranes for heavy metal cationic wastewater treatment: flotation and membrane filtration. Clean Technol Environ Policy 9:189–198
Geraldes V, Anil A, Pinho MN, Duarte E (2007) Dissolved air flotation of surface water for spiral-wound module nanofiltration pre-treatment. Resour Conserv Recycl 50:202–210
Ferguson C, Logsdon GS, Curley D (1995) Comparison of dissolved air flotation and direct filtration. Water Sci Technol 31:113–124
Ortiz-Oliveros HB (2002) Tratamiento de aguas Oleosas por Flotación. Tesis de Maestría, Universidad Autónoma del Estado de México. Facultad de Ingeniería, México
Peters R, Bennet G (1989) The simultaneous removal of oil and heavy metals from industrial wastewater using hydroxide and sulfide precipitation coupled with air flotation. Hazard Waste Hazard Mater 6:327–345
Ødegaard H (1995) Optimization of flocculation/flotation in chemical wastewater treatment. Water Sci Technol 31:73–82
Xiao-bing Li, Jion-tian Liu, Yong-tian Wang, Cun-ying Wang, Xiao-hua Zhou (2007) Separation of oil from wastewater by column flotation. J China Univ Min Technol 17:546–551
American Public Health Association (APHA) (1995) Método 5520 E Soxhlet extraction method. Standard methods for the examination of water and wastewater, USA, 19th edn. APHA, Washington DC, pp 5–34
Cocher DC (1981) Radiactive decay data tables. In: Smith JS (ed). Technical Information Center, U.S. DOE, Springfield
Baes C, Mesmer J (1976) Hydrolysis of cations, 1st edn. Wiley, New York
Reay D, Ratcliff G (1973) Removal of fine particles from water by dispersed air flotation: effects of bubble size and particle size on collection efficiency. Can J Chem Eng 51:178–185
Edzwald J, Malley J, Yu C (1990) A conceptual model for dissolved air flotation in water treatment. Water Supply 8:14–150
Rijk S, Van Der Graff J, Den Blanken J (1994) Bubble size in flotation thickening. Water Res 28:465–473
Pinto Filho ACT, Brandão CS (2001) Evaluation of flocculation and dissolved air flotation as an advanced wastewater treatment. Water Sci Technol 43:83–90
Zoubolis AI, Matis KA (1995) Removal of cadmium from dilute solutions by flotation. Water Sci Technol 31:315–326
Edzwald JK (2010) Dissolved air flotation and me. Water Res 44:2077–2106
Acknowledgments
This work is part of the departmental activity of the Instituto Nacional de Investigaciones Nucleares (ININ). H. B. Ortiz-Oliveros is grateful to ININ, Consejo Nacional de Ciencia y Tecnología (CONACyT) and Universidad Autónoma del Estado de México (UAEM). The technicians of ININ are also acknowledged.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Ortiz-Oliveros, H.B., Flores-Espinosa, R.M., Jiménez-Domínguez, H. et al. Dissolved air flotation for treating wastewater of the nuclear industry: preliminary results. J Radioanal Nucl Chem 292, 957–965 (2012). https://doi.org/10.1007/s10967-012-1682-5
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10967-012-1682-5