Publisher : Korean Society of Environmental Engineering
DOI : 10.4491/eer.2014.S1.011
Title & Authors
Efficiency of a hybrid solid digestion-denitrification column in suspended solid and nitrate removal from recirculating aquaculture system Pungrasmi, Wiboonluk; Chaisri, Ratchadaporn; Malaphol, Ekachai; Powtongsook, Sorawit;
This research focused on the solid and nitrate removal efficiency in a solid digestion-denitrification column. The 20 L up-flow column consisted of 18 L acrylic column with 2 L down-comer inlet tube located in the middle. In the first part, the wastewater with high suspended solids from the Tilapia fish tank was applied into the sedimentation unit at 5 variable flow rates i.e., 11.25, 25.71, 60, 105.88 and 360 L/h. The results indicated that the flow rate of 11.25 L/h (0.57 m/h) gave the highest solid removal efficiency of . However, the total suspended solids removal was highest at 360 L/h (18.13 m/h). In the second part, methanol was added as an external organic carbon source for denitrification process in a hybrid column containing settled solids. The COD:N ratios of 0.5:1, 1:1, 2:1, 3:1, 4:1, 5:1 and 6:1 were investigated and compared with control without methanol addition. This experiment was operated at the HRT of 1 h with 450 L wastewater from recirculating aquaculture pond containing 100 mg-N/L sodium nitrate. The results indicated that the COD:N ratio of 3:1 gave the highest nitrate removal efficiency of with the denitrification rate of 5,102.88 mg-N/day.
Crab R, Avnimelech Y, Defoirdt T, Bossier P, Verstraete W. Nitrogen removal techniques in aquaculture for a sustainable production. Aquaculture 2007;270:1-14.
Nootong K. Nitrogen treatment in closed-system aquaculture. J. King Mongkut's Institute of Technol. Ladkrabang. 2008;16: 11-12.
Gutierrez-Wing MT, Malone RF. Biological filters in aquaculture: Trends and research directions for freshwater and marine applications. Aquac. Eng. 2006;34:163-171.
Rivett MO, Buss SR, Morgan P, Smith JWN, Bemment CD. Nitrate attenuation in groundwater: A review of biogeochemical controlling processes. Water Res. 2008;42:4215-4232.
Mokhayeri Y, Riffat R, Takacs I, et al. Characterizing denitrification kinetics at cold Temperature using various carbon sources in lab-scale sequencing batch reactors. Water Sci. Technol. 2008;58:233-238.
Magram SF. Drinking water denitrification in a packed bed anoxic reactor: effect of carbon source and reactor depth. J. Appl. Sci. 2010;10:558-563.
Menasveta P, Panritdam T, Sihanonth P, Powtongsook S, Chuntapa B, Lee P. Design and function of a closed, recirculating seawater system with denitrification for the culture of black tiger shrimp broodstock. Aquac. Eng. 2001;25:35-49.
Lee PG, Lea RN, Dohmann E, et al. Denitrification in aquaculture systems: an example of a fuzzy logic control problem. Aquac. Eng. 2000;23:37-59.
Singer A, Parnes S, Gross A, Sagi A, Brenner A. A novel approach to denitrification processes in a zero-discharge recirculating system for small-scale urban aquaculture. Aquac. Eng. 2008;39: 72-77.
Pungrasmi W, Playchoom C, Powtongsook S. Optimization and evaluation of a bottom substrate denitrification tank for nitrate removal from a recirculating aquaculture system. J. Environ. Sci. 2013;25:1557-1564.
Aboutboul Y, Arviv R, van Rijn J. Anaerobic treatment of intensive fish culture effluents: volatile fatty acid mediated denitrification. Aquaculture 1995;133:21-32.
Tal Y, Schreier HJ, Sower KR, Stubblefield JD, Place AR, Zohar Y. Environmentally sustainable land -based marine aquaculture. Aquaculture 2009;286:28-35.
APHA, AWWA, WEF. Standard Methods for the Examination of Water and Wastewater. 21st ed. Washington DC: American Public Health Association; 2005.
APHA, AWWA, WEF. Standard Methods for the Examination of Water and Wastewater. 18th ed. Maryland, USA: American Public Health Association; 1992.
Nurit S. Development of solid separating unit and the effect of solid to water quality in closed aquaculture system. [Thesis]. Bangkok: Chulalongkorn Univ.; 2011.
Suttisri R. Efficiency of closed recirculating seawater system for an indoor super-intensive shrimp culture. [Thesis]. Bangkok: Chulalongkorn Univ.; 2006.
Kaviraj A, Bhunia F, Saha NC. Toxicity of methanol to fish, crustacean, oligochaete worm and aquatic ecosystem. Int. J. Toxicol. 2004;23:55-63.
van Rjin J, Tal Y, Schreier HJ. Denitrification in recirculating systems: Theory and applications. Aquac. Eng. 2006;34: 364-376.
Surampalli RY, Tyagi KD. Advances in Water and Wastewater Treatment. Virginia: American Society of Civil Engineers; 2004.