Effect of Salt on Anammox Process

Effects of different growth systems and salinity on freshwater anammox bacteria were researched in this paper with SBR reactor. It was indicated that the attached growth system could retain anammox bacteria better than suspended growth system. And the nitrogen removal ratios in the attached one were obviously higher than that in the suspended one in the same degrade of sludge load. The freshwater anammox population could adapt to salinity in 7gNaCl/l. The effects of salt shock loads on freshwater anammox population were also researched. It was shown that the freshwater bacteria could afford salt shock load max to 4kgNaCl/m3 d which was function with sludge quantity. Although a substantial increase in salt load would lead to freshwater anammox bacteria unadaption, suddenly draw-off salt load would be more serious for anammox bacteria.