摘要
以低COD/N人工模拟废水为基质,研究移动床生物膜反应器（MBBR）内同步硝化反硝化（SND）过程。进水COD和NH4＋-N的质量浓度分别为200 mg/L和40 mg/L,以K1型填料为载体（填充率为40%）,DO控制在3~4mg/L,20 d后有稳定的生物膜形成。生物膜完全成熟后,每个填料上平均生物膜量为33.5 mg,出水COD和NH4＋-N去除率平均分别达86.68%和97.25%,NO2--N基本无累积,NO3--N的质量浓度均保持在5 mg/L以下,TN去除率在后期最高达90.6%,计算得到SND率达91.66%,结果证实在单一反应器内实现了良好的同步硝化反硝化过程。动力学模拟得出同步硝化反硝化过程中的NO3--N饱和常数为5.83 mg/L,大于单级反硝化过程中的硝酸盐氮饱和常数。
The simultaneous nitrification-denitrification （SND） process was investigated in moving bed biofilm reactor （MBBR） using artificial wastewater with low COD/N as the substrate. K1 type packing film was filled into the reactor with the rate of 40%（v/v）, DO was controlled between 3~4 mg/L, and COD and mass concentration of NH4＋-N of influent water was 200 mg/L and 40 mg/L respectively. The biofilm was formed after 20 d of reactor operation. When the biofilm with an average of 33.5 mg per packing film was fully mature, the removal rates of COD, NH4＋-N and TN were 86.68%, 97.25% and 90.6%, respectively. NO2--N concentration always kept low level, NO3-N kept below 5 mg/L and SND rate was calculated as 91.66%. These results demonstrate that SND could be achieved in the MBBR with high nitrogen removal efficiency. A kinetic model was used to describe the SND and the simulation NO3＋-N saturation coefficient （K（NO3--N）, 5,83 mg/L） was higher than that of in a single-sludge wastewater treatment system.
出处
《水处理技术》
CAS
CSCD
北大核心
2014年第9期26-30,共5页
Technology of Water Treatment
基金
国家自然科学基金项目(51278001)
国家水体污染控制与治理科技重大专项(2012ZX07103-001-02)
关键词
移动床生物膜反应器
同步硝化反硝化
脱氮
动力学模型
moving bed biofilm reactor
simultaneous nitrification and denitrification
nitrogen removal
kinetic model
作者简介
作者简介：丁进（1989-），男，硕士研究生，研究方向为环境生物技术研究开发；联系电话：15215600672；电子邮件：dingwdyx@126．com
联系作者：石先阳；联系电话：13865998645;电子邮件：shixi381@163．com
