NOVELTY - A sequencing batch reactor device comprises enrichment device for anaerobic ammonia oxidizing bacteria reactor (3), water inlet pipe (1), drain pipe (17), aeration pipe (11), and liquid pipe (7). The device further comprises water pump, water outlet pipe, drainage valve, air valve, pump, water tank, air compressor, pH sensor, temperature sensor, aeration sand head, oxidation-reduction potential (ORP) sensor, heating pump, water inlet pump, programmable process controller, water relay, alkali relay, aeration relay, and air compressor relay.    USE - Sequencing batch reactor device used for enriching anaerobic ammonia oxidizing bacteria (claimed).    ADVANTAGE - The total number of bacteria is improved from 3% to 11% for 40 days and to 90% for 100 days. The device has short enriching time and high degree of enriching bacteria and is controllable.    DETAILED DESCRIPTION - A sequencing batch reactor device comprises enrichment device for anaerobic ammonia oxidizing bacteria reactor (3), water inlet pipe (1), drain pipe (17), aeration pipe (11), and liquid pipe (7). The device further comprises water pump, water outlet pipe, drainage valve, air valve, pump, water tank, air compressor, pH sensor, temperature sensor, aeration sand head, oxidation-reduction potential (ORP) sensor, heating pump, water inlet pump, programmable process controller, water relay, alkali relay, aeration relay, and air compressor relay. The enrichment method of ammonia oxidizing bacteria is performed by feeding 20-30% water to enrichment device with ammonia oxidizing bacteria, where concentration is 50-100 mg/l, starting pumping ammonia-containing sewage into reactor till needed volume; stirring, controlling pH value and temperature; recording data every 1-2 minutes, determining manual salinity to 2-6, aerating for more than 60 minutes till ammonia oxidation rate inflection point, and closing air compressor; and setting precipitation time to 30-60 minutes for drain valve to start, where draining ratio is 20-30%, ending cycle reaction, and detecting inflection point occurs within 200-300 minutes of ammonia oxidation rate.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of sequencing batch reactor device.    Water inlet pipe (1)    Enrichment device for anaerobic ammonia oxidizing bacteria reactor (3)    Liquid pipe (7)    Aeration pipe (11)    Drain pipe (17)