The potential of dairy wastewater for denitrification

作者：Dragicevic Tibela Landeka^*; Hren Marijana Zanoski; Grgas Dijana; Buzdum Igor; Curlin Mirjana

来源：Mljekarstvo, 2010, 60(3): 191-197.

• dairy wastewater
• denitrification
• microbial culture of nitrificants and denitrificants

In this work the potential of dairy wastewater for denitrification process by means of a microbial culture of nitrificants and denitrificants was investigated. The aim of this work was to remove nitrate by using organic compounds from the dairy wastewater as an electron donors. The minimal ratio of COD/NO(3)-N of 10 (COD-chemical oxygen demand/NO(3)-N-nitrate nitrogen) was required to achieve complete reduction of NO(3)-N. The microbial culture of nitrificants and denitrificants, that was previously adapted on the dairy wastewater, carried out nitrate reduction with a different substrate utilization rate. The denitrification rate of 5.75 mg NO(3)-N/Lh was achieved at the beginning of denitrification when the microbial culture utilizes readily biodegradable COD. Further degradation occurred with the denitrification rate of 1.7 mg NO(3)-N/Lh.

• 出版日期2010-9