Based　on　the　experimental　results　of　the　lab-scale　reactor　and　the　operational　data　of　the　demonstration　project,　the　wastewater　treatment　plant　with　one-stage　anammox　process　was　comprehensively　evaluated　and　analyzed　in　this　paper.　Firstly,　the　mass　balance　of　the　COD　and　nitrogen　was　analyzed.　The　analysis　showed　that　the　effluent　of　wastewater　treatment　plant　based　on　anammox　process　could　meet　one-class　A　permitted　criteria　and　the　recovery　of　organic　matter　doubled　when　comparing　to　the　traditional　A2O　wastewater　treatment　process.　We　further　investigated　the　effect　of　anammox　process　on　energy　consumption　of　the　wastewater　treatment　plant.　Due　to　the　reduction　of　aeration　energy　consumption　and　the　improvement　of　methane　production　in　anaerobic　digestion　process,　the　theory　energy　self-sufficiency　efficiency　of　90%　could　be　achieved.　The　analysis　of　mass　balance　and　energy　consumption　indicated　that　the　separate　removal　of　organic　matter　and　nitrogen　in　the　wastewater　pollutants　was　the　key　to　enhance　energy　self-sufficiency　efficiency.　©,　2015,　Beijing　University　of　Technology.　All　right　reserved.