新型厌氧多级喷动床及其厌氧氨氧化脱氮性能分析

NITROGEN REMOVAL PERFORMANCE OF A NOVEL MULTI-SETTLER ANAEROBIC SPOUTED BED REACTOR VIA ANAEROBIC AMMONIA OXIDATION(ANAMMOX)PROCESS

为改善厌氧反应器内的流态,加快污泥的颗粒化和形成具有生态梯度的微生物生态系统,设计并制作了新型厌氧多级喷动床,实验测试了反应器的水力喷动、气体喷涌和污泥分层分级现象。在常温下,利用新型厌氧多级喷动床接种混合污泥,经过42 d的培养,成功启动厌氧氨氧化反应器,稳定运行18 d后,NH+4-N、NO-2-N去除率均达到90%以上。启动60 d后,反应器底部出现大量粒径2 mm左右的颗粒污泥,且污泥具有良好的稳定性和沉降性能,沉降速度达到70 m/h。结果表明:厌氧多级喷动床因其特殊的水力结构,可有效加快污泥的颗粒化。

In order to improve the flow state in the anaerobic reactor,accelerate the granulation of sludge and form an ecological gradient microbial ecosystem,a new type of anaerobic multi-stage spouted bed was designed and fabricated,and the hydraulic spout,gas jet and sludge stratification of the reactor were tested.At room temperature,the mixed sludge was inoculated into a new type of anaerobic multi-stage spouted bed.After 42 days of cultivation,the anaerobic ammonium oxidation reactor was successfully started.Through 18 days of stable operation,the removal rates of NH+4-N and NO-2-N were achieved of 90%above.After 60 days of starting,a large amount of granular sludge with particle size of about 2 mm appeared at the bottom of the reactor,which sludge had good stability and sedimentation performance,which sedimentation speed reached 70 m/h.The results showed that the anaerobic multi-stage spouted bed could effectively accelerate the granulation of sludge,due to its special hydraulic structure.