新型厌氧多级喷动床及其厌氧氨氧化脱氮性能分析

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,NH₄+-N、NO₂--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。

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

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 NH₄+-N and NO₂--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.