Changes in functional properties of biological denitrification in the long-term use of methanol were explored,with addition of methanol(ρ(TOC)/ρ(N)=1.6±0.2) at the start of anoxic phase in sequencing batch reactor(SBR).The results showed that stable nitrate reduction rates were not reached until 37 days of methanol addition,and specific denitrification rate increased from 0.378 mgNOx-N/(gVSS·h) to 2.406 mgNOx-N/(gVSS·h).Besides,from nitrogen uptake rate(NUR) tests with methanol acclimation sludge,the approp...