利用好氧颗粒污泥持续增殖启动高性能亚硝化反应器

发布时间：2019-03-18 20:44

【摘要】：为了考察亚硝化颗粒污泥(NGS)的持续增殖能力,向柱状序批式反应器(SBR)内接种极少量种污泥,在130 d内,将氨氮容积负荷(NLR)从0.74 kg·(m~3·d)~(-1)提高到6.66 kg·(m~3·d)~(-1),成功使反应器内污泥浓度(MLSS)从0.1 g·L~(-1)增长至11.8 g·L~(-1),对应的亚硝态氮累积负荷从0.4 kg·(m~3·d)~(-1)升至4.9 kg·(m~3·d)~(-1).当NLR低于4.44 kg·(m~3·d)~(-1)时,反应器内粒径200μm的污泥数量明显增多,颗粒平均粒径大幅减小.当NLR继续提高时,颗粒平均粒径的增长过程遵循修正的Logistic模型,其比增长速率k值约为0.022 9 d-1.在运行期间,较高的游离氨(FA)和游离亚硝酸(FNA)浓度能够对亚硝酸盐氧化菌(NOB)起到联合抑制作用,这使得出水中亚硝态氮累积率(NAR)始终高于80%.上述实验结果将为工业化高效NGS反应器的启动操作提供重要参考.
[Abstract]:In order to investigate the sustainable proliferation of nitroso-granular sludge (NGS), a very small amount of seed sludge was inoculated into the column sequencing batch reactor (SBR) for 130 days. The volumetric loading (NLR) of ammonia nitrogen was increased from 0.74 kg (m ~ 3 路d) ~ (- 1) to 6.66 kg (m ~ 3 路d) ~ (- 1). The sludge concentration in the reactor was increased from 0.1g 路L ~ (- 1) to 11.8g 路L ~ (- 1). The cumulative load of nitrite increased from 0.4 kg (m ~ 3 路d) ~ (- 1) to 4.9 kg (m ~ 3 路d) ~ (- 1). When NLR was lower than 4.44 kg (m ~ 3 路d) ~ (- 1), the amount of sludge with 200 渭 m particle size in the reactor increased obviously, and the average particle size decreased significantly. When NLR continues to increase, the growth process of average particle size follows the modified Logistic model, and the specific growth rate k is about 0.022 9 d / 1. High concentration of free ammonia (FA) and free nitric acid (FNA) could inhibit the nitrite oxidizing bacteria (NOB), which made the accumulation rate of nitrite nitrogen in effluent (NAR) higher than 80% all the time. These experimental results will provide an important reference for the start-up operation of industrialized high-efficiency NGS reactor.
【作者单位】：苏州科技大学环境科学与工程学院;城市生活污水资源化利用技术国家地方联合工程实验室;江苏省环境科学与工程重点实验室;苏州科技大学天平学院;
【基金】：国家自然科学基金项目(51308367,51578353) 苏州科技大学研究生科研创新计划项目(SKCX16-022,SKCX16-032) 江苏高校优势学科建设项目江苏省高校大学生实践创新训练计划项目(201613985003Y)
【分类号】：X703.1

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