Removal of Nitrogenous Compounds Using Trickling Filter with Hexagonal Close Packed Media

Joan Dolly Chung, Ir. Law Puong Ling Ling, Ir. Frederik Josep Putuhena

Abstract


Nitrogenous compound in the domestic wastewater has the capability of impounding adverse effects on the surface water and for the purpose of this study trickling filter (TF) is utilized for the removal of pollutants, inclusive of ammonia contained in domestic wastewater. This system, which is an attached growth process, adopts the usage of media in the form of hexagonal close-packed (HCP) as a platform for the growth of biofilm with the aid of microorganisms which in turn removes the pollutants when in contact with the feed. The HCP is reported to have a surface area of 130 m2 which exceeds the value of a conventional media. Prior to experimental run, the system underwent start-up process, of which a concoction of wastewater, sludge and inoculated yeast agar was fed to the TF system in order to stimulate biofilm growth. Post experimental start-up, bacteria isolation was performed to ensure the existence of Nitrosomnas on the media surface, as this class of bacteria will ensure the removal of Ammonia. Experimental run was carried out for the span of 25 days, by replacing the aforementioned concoction with raw wastewater. Prime parameters investigated are Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD) and Ammonia.

Full Text:

PDF

References


Raj S.A., Murthy D.V.S. Nitrification of synthetic wastewater in a cross flow medium trickling filter. Bioprocess Engineering. 1998; 19: 149–54p.

Grunditz C., Dalhammar G. Development of nitrification inhibition assays using pure cultures of Nitrosomonas and Nitrobacter. Pub Med. 2001; 35: 433–40p.

Zhao H.W., Mavinic D.S., Oldham W.K., et al. Controlling factors for simultaneous nitrification and denitrification in a two-stage intermittent aeration process treating domestic sewage. Water Research. 1999; 33: 961–70p.

Dincer A.R., Kargi F. Kinetics of sequential nitrification and denitrification processes. Enzyme and Microbial Technology. 2000; 27(1–2): 37–42p.

Austin B. Methods in aquatic bacteriology. University of Minnesota. New York, U.S.: John Wiley and Sons Ltd.; 1991.

Rice E.W., Baird R.B., Eaton A.D., et al. Standard Methods for the examination of water and wastewater. 21st Edn. APHA, AWWA, Washington; 2005.

Bitton G. Wastewater Microbiology. New York, U.S.: John Willey & Sons Inc.; 1994; 139–229: 3–51p.




DOI: https://doi.org/10.37628/jwre.v1i1.6

Refbacks

  • There are currently no refbacks.