Effect of different process parameters on performance of ammonia nitrogen removal by immobilized effective microorganisms with PVA-boric acid immobilization method was investigated using an aerobic sequencing batch process. The results showed that the removal of ammonia nitrogen was attributing to biodegradafion ability of EM and effective adsorption by PVA-boric acid beads. The addition of shell powder and the centrifugal EM rejuvenation liquid in PVA-boric acid beads could effectively enhance the intensity of the beads and the degradation ability of ammonia nitrogen. The removal efficiency of ammonia nitrogen reached over 90％ after 6 running cycles. The mass of immobilized EM in PVA-boric beads would help to improve removal efficiency of ammonia nitrogen at early run-time. The optimum immobilized EM concentration was 10:.3 when PVA-boric beads were for long-term use.%采用PVA-硼酸包埋固定化EM菌,在好氧、批式运行条件下,系统考察不同的工艺参数对固定化EM菌的氨氮去除性能的影响.结果表明:用PVA-硼酸包埋法固定EM的小球对氨氮的去除是EM生物降解、包埋小球自身吸附的共同结果;以贝壳粉末作为添加剂、包埋离心后的EM有利于提高包埋小球的强度及脱氨效果.经过6个运行周期,氨氮的去除率可达到90%以上;较多EM包埋量仅在运行初期有助于提高脱氨效果,长期使用PVA小球时的最适宜的EM包菌量体积比为10:3.
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