Nitrogen　removal　via　nitrite　is　a　novel　technology　and　is　becoming　popular　for　engineering　applications　since　it　results　in　a　saving　of　the　aeration　energy　required　for　nitritation　and　external　carbon　sources　for　denitritation.　An　alternating　aerobic-anoxic　(AAA)　operational　pattern　was　applied　in　a　sequencing　batch　reactor　(SBR)　process　to　improve　the　nitrogen　removal　efficiency　and　achieve　partial　nitrification　via　nitrite　from　industrial　wastewater　with　influent　alkalinity　deficiencies.　The　results　showed　that　the　online　monitoring　of　the　pH-time　variations　during　nitrification　could　indicate　if　the　alkalinity　was　sufficient　and　when　the　ammonia　nitrogen　was　completely　oxidized.　Under　conditions　of　deficient　influent　alkalinity,　the　AAA　process　reduced　the　external　alkalinity　and　the　carbon　sources　addition　and　improved　the　effluent　quality　with　ammonia　nitrogen　concentration　below　the　detection　limits.　Half　of　the　alkalinity　previously　consumed　during　aerobic　nitrification　could　be　recovered　during　the　subsequent　anoxic　denitrification　period.　If　the　cycles　of　alternating　aerobic/anoxic　were　repeated　more　than　twice,　the　first　nitrification　cycle　was　stopped　when　the　pH　decreased　by　0.4-0.5.　The　middle　nitrification　was　terminated　when　the　pH　decreased　by　0.8-1.0,　and　the　final　nitrification　duration　was　controlled　by　the　dissolved　oxygen　(DO)　breakpoint　and　ammonia　valley　on　the　pH　profile.　Each　anoxic　time-scale　for　denitrification　was　determined　by　the　nitrate　knee　on　the　oxidation-reduction　potential　(ORP)　profile　and　the　nitrate　apex　on　the　pH　profiles.　In　comparison　to　the　conventional　SBR　process,　the　AAA　process　with　a　real-time　control　strategy　resulted　in　an　improved　nitrogen　removal　efficiency　of　greater　than　97%　under　conditions　of　deficient　influent　alkalinity.　Moreover,　nitrogen　removal　via　nitrite　was　achieved　with　a　nitrite　accumulation　rate　above　95%.