低碳氮比畜禽粪水厌氧消化液短程硝化脱氮试验研究

何清明; 李廷友; 韦平和

文章摘要

何清明,李廷友,韦平和.低碳氮比畜禽粪水厌氧消化液短程硝化脱氮试验研究[J].农业环境科学学报,2016,35(10):2005-2010.

低碳氮比畜禽粪水厌氧消化液短程硝化脱氮试验研究

Feasibility study on the treatment of low C/N digested animal manure with shortcut nitrification-denitrification process

投稿时间：2016-03-18

DOI：10.11654/jaes.2016-0355

中文关键词: 脱氮亚硝酸盐畜禽粪水硝化-反硝化

英文关键词: nitrogen removal nitrite animal manure nitrification-denitrification

基金项目:泰州市科技支撑计划（社会发展）项目（TS201513）；江苏省高校自然科学研究面上项目（15KJD610005）；泰州学院人才启动项目（QD2016003）

作者	单位
何清明	泰州学院, 江苏泰州 225300 重庆大学三峡库区生态环境教育部重点实验室, 重庆 400045
李廷友	泰州学院, 江苏泰州 225300
韦平和	泰州学院, 江苏泰州 225300

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中文摘要:

针对畜禽粪水厌氧消化液存在低C/N、后续可生化性差等问题，提出利用短程硝化反硝化技术处理高氨氮畜禽粪水厌氧消化液。结果表明：在（29±1）℃条件下，通过调节曝气量控制DO在0.6~0.9 mg·L^-1之间，接种厌氧氨氧化颗粒污泥可快速实现短程硝化反硝化；之后在恒定曝气量下使反应器内DO为0.1~2.88 mg·L^-1时，在处理高氨氮粪水过程中，通过对比四组不同pH和游离氨（FA）发现，当pH=8、FA=18 mg·L^-1左右时更利于亚硝化菌的优势竞争并可长期稳定实现短程硝化反硝化；应用MPN法测得氨氧化菌（AOB）和亚硝酸氧化菌（NOB）数量之比为600：1。SBR反应器稳定运行期间COD负荷和氨氮负荷分别为2.0~3.5 kg·m^-3·d^-1和0.6~0.8 kg·m^-3·d^-1，COD去除率为63%~71%，NH₄⁺-N去除率在94.9%以上，NO₂^--N积累率（NAR）达到94.25%以上。

英文摘要:

Traditional digested animal manure has some problems such as low C/N and poor biodegradability, thus shortcut nitrification-denitrification was suggested to deal with the manure. Our study showed that by controlling DO concentration within the range of 0.6~0.9 mg·L^-1, seeding the reactor with anaerobic ammonia oxidation granulated sludge to achieve a stable nitrite accumulation under(29±1)℃ could realize partial nitrification-denitrification quickly. Then we kept DO concentration within the range of 0.1~2.88 mg·L^-1 under constant aeration, and the best nitrite accumulation and NH₄⁺-N removal efficiency was observed when pH at 8 and FA at 18 mg·L^-1, a condition more conducive to nitrite bacteria for competitive advantage and long-term stability to achieve shortcut nitrification-denitrification, through the comparison of four different groups. Moreover, the quantitative ratio of ammonia-oxidizing bacteria(AOB) to nitrite-oxidizing bacteria(NOB) was 600:1. During the stabilized flow of the anaerobic digestion fluid into the SBR, the loading rates of COD and NH₄⁺-N were 2.0~3.5 kg·m^-3·d^-1 and 0.6~0.8 kg·m^-3·d^-1, with the removal rates of COD and NH₄⁺-N for 63%~71% and 94.9%, respectively. And the nitrite accumulation rate reached more than 94.25%.

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