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When the COD\/N was changed from 4.0 to 1.8 and the effluent nitrate was above 8.48 mg\/L, the nitrate accumulation ratio (NAR) and nitrate removal ratio (NRR) achieved 60 and 90%, respectively. With the electron donor starvation (EDS) strategy, nitrite accumulation was increased, which is related to the reduced utilization of carbon sources. In addition, the rapid increase of Thauera (0.21% to 53.29%) and inhibition of Others and Unclassified (96.93% to 16.99%), and the significantly different expression between reductase genes contributed to nitrite production (narG, 1,727.44 copies\/mg) and nitrite reduction (nirS, 208.27 copies\/mg; nirK, 203.94 copies\/mg) commonly involved in PD start-up and stable operation. Another reactor can be quickly started by controlling effluent residual nitrate within 19 days.<\/jats:p>","DOI":"10.2166\/wst.2022.203","type":"journal-article","created":{"date-parts":[[2022,7,4]],"date-time":"2022-07-04T05:41:06Z","timestamp":1656913266000},"page":"1222-1231","update-policy":"https:\/\/doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":10,"title":["High-rate partial denitrification via effluent residual nitrate controlling and microbial mechanism of nitrite accumulation by carbon dosage optimization"],"prefix":"10.2166","volume":"86","author":[{"given":"Xiang","family":"Chen","sequence":"first","affiliation":[{"name":"a Department of Resources Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou city, Jiangxi province 341000, P.R. 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