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Did you read here ? "Sulphur nitrate filter grade 1"
http://www.ratz-aquarientechnik.com/Katalog/Katalogauswahl.asp?Param1=E0859622&Page=4

¨â¤é´N·|¥Í®Ä? NO! It is a part of tuning because It is a slow start filter, require tuning the flow rate and NO3 keep ~0 until the flow rate reach the max. flow rate, but heterotrophic denitricator can not do that.

For heterotrophic Bio-denitrification, it require organic compound like alcohol, organic acids, sugar to feed the bacteria and it will pollute water and also, it is easy to block the outlet by organic compound.

But For Autotrophic Bio-denitrification, it is fed by in-organic compound and filter substrate like sulphur , CO2 and their by-product.


deechand ­×§ï¤_ 2003-09-20 00:39
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franng ­×§ï¤_ 2003-09-20 01:54
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¤@©w­ø«YAZ-NO3­ÓºØ°Õ,²Ä¤@Ê\°_°Ê«YºCªº,²Ä¤GÊ\¤ÆN03¥hN2ªº.¤]¤£¬O¸g¤Æ¾Ç§@¥ÎªºÂ÷¤l¥æ´«¤è¦¡,¦]¬°¦b¤§«e©Þ¨ìªº¹êÅç°O¿ý(http://www.iranrivers.com/Electronic_Library/paper/Asce/3.pdf)
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According to Batchelor and Lawrence (1978a, 1978b): Thiobacillus denitrificans reduces nitrates using elemental sulfur based on the following stoichiometric equation: 55 S + 20 CO2 + 50 NO3- + 38 H2O + 4 NH4+ ----> 4 C5H7O2N + 25 N2 + 55 SO42- + 64 H+

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