付雪,毛佩玥,赵鑫磊,邢嘉伟,秦彦荣,陈永志.曝气量和盐度对硝化型颗粒污泥脱氮速率及粒径分布的影响[J].环境科学学报,2021,41(4):1293-1302
曝气量和盐度对硝化型颗粒污泥脱氮速率及粒径分布的影响
- Effects of aeration rate and salinity on the denitrification rate and particle size distribution of nitrifying granular sludge
- 基金项目：国家自然科学基金（No.51668033）；甘肃省自然科学基金（No.18JR3RA126）；甘肃省高等学校特色专业-环境工程项目（No.101004）
- 付雪
- 1. 兰州交通大学环境与市政工程学院, 兰州 730070;2. 甘肃省污水处理行业技术中心, 兰州 730070;3. 甘肃省黄河水环境重点实验室, 兰州 730070
- 毛佩玥
- 1. 兰州交通大学环境与市政工程学院, 兰州 730070;2. 甘肃省污水处理行业技术中心, 兰州 730070;3. 甘肃省黄河水环境重点实验室, 兰州 730070
- 赵鑫磊
- 1. 兰州交通大学环境与市政工程学院, 兰州 730070;2. 甘肃省污水处理行业技术中心, 兰州 730070;3. 甘肃省黄河水环境重点实验室, 兰州 730070
- 邢嘉伟
- 1. 兰州交通大学环境与市政工程学院, 兰州 730070;2. 甘肃省污水处理行业技术中心, 兰州 730070;3. 甘肃省黄河水环境重点实验室, 兰州 730070
- 秦彦荣
- 1. 兰州交通大学环境与市政工程学院, 兰州 730070;2. 甘肃省污水处理行业技术中心, 兰州 730070;3. 甘肃省黄河水环境重点实验室, 兰州 730070
- 陈永志
- 1. 兰州交通大学环境与市政工程学院, 兰州 730070;2. 甘肃省污水处理行业技术中心, 兰州 730070;3. 甘肃省黄河水环境重点实验室, 兰州 730070
- 摘要：采用SBR反应器，在交替缺氧/好氧模式下处理低C/N生活污水，考察曝气量、盐度对短程硝化好氧颗粒污泥脱氮速率及粒径分布的影响.结果表明，在25 ℃、pH为7.5~8.0条件下，当进水NH4+-N为65 mg·L-1时，控制曝气量分别为8.75、12.50和16.25 L·h-1·L-1，在第35、24和23个周期时NH4+-N去除率分别高达95.49%、98.46%和98.54%，选取12.50 L·h-1·L-1为最佳曝气量.控制在最佳曝气量条件下，当盐度为0时，NH4+-N去除率及亚硝积累率分别为98.46%和90.42%；在盐度为5.0%时，NH4+-N去除率和亚硝积累率分别为98.34%和96.71%.当曝气量从8.75 L·h-1·L-1提升为16.25 L·h-1·L-1，颗粒污泥平均粒径由170 μm增大为231.5 μm；控制曝气量在12.5 L·h-1·L-1，增加盐度至5.0%，颗粒污泥平均粒径由231 μm下降至156 μm，其占比由40.50%增加到48.26%.
- Abstract：The SBR reactor was used to treat low-carbon to nitrogen ratio(C/N) domestic sewage in alternating anoxic/aerobic mode, and the effects of aeration rate and salinity on the nitrogen removal rate and particle size distribution of short-cut nitrification aerobic granular sludge were investigated. The results showed that when the temperature was 25℃, and the pH was 7.5~8.0, and the influent NH4+-N was 65 mg·L-1, the removal rate of NH4+-N was as high as 95.49%, 98.46% and 98.54% in the 35th, 24th and 23rd cycles, and 12.5 L·h-1·L-1 was selected as the optimal aeration rate. Controlling the aeration rate to 12.5 L·h-1·L-1, When the salinity was 0, the removal rate of the ammonia nitrogen and the accumulation rate of nitrite nitrogen were 98.46% and 90.42%, respectively. When the salinity was 5.0%, the removal rate of the ammonia nitrogen and the accumulation rate of nitrite nitrogen were 98.34% and 96.71%, respectively. The aeration rate was increased from 8.75 L·h-1·L-1 to 16.25 L·h-1·L-1, the average particle size was increased from 170.0 μm to 231.5 μm. When the aeration rate was controlled at 12.5 L·h-1·L-1 and the salinity was increased to 5.0% simultaneously, the average particle size was decreased from 231 μm to 156 μm, and the proportion of it increased from 40.50% to 48.26%.
