Autohydrogenotrophic Denitrification Using the Membrane Biofilm Reactor for Removing Nitrate from High Sulfate Concentration of Water

Table 2

Water quality parameters of the groundwater.

Total dissolved solids (mg/l)	pH	Alkalinity (mg/l as CaCO3)	Hardness (mg/l as CaCO3)	DO	Nitrate (mg N/l)	Nitrite (mg N/l)	Sulfate (mg/l)
300–400	7.2~7.5	320~500	400~650	6.0–6.4	35~60	ND	250~450

ND: not detected.