A　novel　technology　for　nutrient　removal　from　wastewater　was　developed　using　the　sequencing　batch　reactor　(SBR)　activated　sludge　process.　Nitrogen　removal　can　be　achieved　at　28±1°C　via　shortcut　nitrification　and　denitrification　by　controlling　the　pH　value　at　78-87.　The　experimental　results　indicated　that　nitrite　was　the　main　element　in　the　effluent　when　aeration　was　ended　after　twenty-five　days,　that　nitrate　was　less　than　4　mg/L,　and　that　the　nitrosation　rate　(NO2--N/NOx--N)　was　more　than　90%.　In　addition,　as　free　ammonia　(FA)　concentration　was　always　at　052-472　mg/L　during　nitrification,　it　would　inhibit　the　nitrite　oxidizers.　So　the　shortcut　mechanism　achieved　in　nitrification-denitrification　by　controlling　the　pH　value　is　that　using　the　inhibition　of　the　nitrite　oxidizers　to　raise　pH　value　and　free　ammonia　results　in　accumulation　of　the　nitrite.