Short-Term Effects Of Tourmaline On Nitrogen Removals And Microbial Communities In A Sequencing Batch Reactor At Low Temperatures

Tourmaline is a ring borosilicate with unique pyro-electricity and piezoelectricity values. Non-gem tourmaline is usually used as an environmental material. The short-term effects of ultrafine tourmaline particles on nitrogen removal performs microbial population dynamics. Key functional species in a sequencing batch reactor were investigated at 9 +/- 1 degrees C. The investigation results showed that 1 gL(-1) ultrafine tourmaline particles could resist the effect of temperature shock on the metabolism of NH4+-N and were beneficial to the restoration of the metabolism capacity of NH4+-N. 1 gL(-1) ultrafine tourmaline particles, which increased the oxidation rate of NH4+-N in the aerobic phase, the formation rate of NO3--N in the aerobic phase, and the denitrification rate in the hypoxia phase at low temperatures. However, the community richness or diversities were not changed after short-term exposure to 1 gL(-1) ultrafine tourmaline particles at low temperatures and 1 gL(-1) ultrafine tourmaline particles could not change the relative abundances of functional microbes except nitrite oxidizing bacteria.