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AWWA JAW34180

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AWWA JAW34180 Journal AWWA - Removing Nitrate With a Methylotrophic Fluidized Bed: Technology and Operating Performance

Journal Article by American Water Works Association, 04/01/1993

Liessens, Jan;Germonpre, Richard;Beernaert, Stan;Verstraete, Willy

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A pilot biological fluidized-bed plant with a capacity of 40 m3/h has been in operation since January 1988 at De Blankaart drinking water production center for removing nitrate from surface water. Methanol is used as the reductant. With a nitrate removal efficiency of 9.0 kg NO3-/m3 reactor.day at 3.5C, the system has shown superior performance compared with conventional fixed-film biofilm reactors. With an influent concentration of 75 mg No3-/L, complete nitrate removal was achieved at an empty bed contact time of 15 min. Nitrite was not detected in the effluent, provided there was a slight excess of methanol (1-2 mg/L). Residual methanol was easily removed by the existing downstream drinking water treatment processes. Includes 62 references, tables, figures.

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Edition: Vol. 85 - No. 4 Published: 04/01/1993 Number of Pages: 11File Size: 1 file , 2.7 MB