【作者】 聂颖；

【导师】 吴春笃；

【作者基本信息】 江苏大学 ， 环境工程， 2007， 硕士

【摘要】 ADC发泡剂废水是一种含有高浓度氨氮的工业废水,其成分复杂,治理相当困难。课题以江苏索普化工有限公司ADC发泡剂废水为研究对象,采用物化预处理和生化处理相结合的工艺对其进行试验研究。课题分为两个部分,第一部分为物化预处理试验,采用的方法为超声吹脱法。该法是在传统空气吹脱法的基础上,将超声波降解技术和吹脱技术联用而衍生出来的一种新型、高效的高浓度氨氮废水处理技术。试验中主要考察了pH值、初始氨氮浓度、温度及吹脱时间等因素对氨氮的去除效果产生的影响。人工配水试验结果表明:在较低初始氨氮浓度条件下,氨氮的去除效果不理想;而在较高初始氨氮浓度条件下,氨氮去除率则有了明显的提升,最高可接近90%,即随着初始氨氮浓度的提高,氨氮去除率是呈上升趋势的。随着pH值的升高,氨氮的去除率也呈上升趋势,并在pH=11时达到最佳;当pH=11时,废水中氨氮的去除率随着反应温度的升高、吹脱时间的延长,都表现出了上升的趋势。在超声波功率为100W,气液比为500:1的情况下,试验确定最佳氨氮去除工艺条件为pH=11,温度T=30℃,吹脱时间t=80min。在最佳工艺条件下对ADC发泡剂废水的治理取得了很好的效果,较高初始氨氮浓度条件下,超声吹脱法对废水中氨氮的去除率高于75%,最高甚至超过90%。第二部分为生化处理试验,采用A/DAT-IAT（Anoxic/Demand Aeration Tank-Intermittent Aeration Tank）工艺与短程硝化反硝化技术相结合对ADC发泡剂废水进行脱氮研究。试验结果表明:利用低DO浓度（1.0mg/L）能够导致A/DAT-IAT工艺DAT池内亚硝酸盐氧化菌的抑制或淘洗,实现DAT池短程硝化,进而实现A/DAT-IAT工艺的短程硝化反硝化生物脱氮。在系统运行正常,ADC发泡剂废水平均进水氨氮浓度280.1mgNH₄⁺-N/L的情况下,平均出水氨氮浓度仅为12.3mgNH₄⁺-N/L,去除率超过95%;系统长期维持低DO浓度,DAT池短程硝化过程稳定,平均亚硝化率可达82.1%,最高可达90%以上,而且没有发生由丝状菌引起的污泥膨胀,污泥絮凝密实并出现污泥颗粒化现象,沉降性能大大提高,污泥SVI值始终保持在90～125mL/g范围内。更多还原

【Abstract】 ADC foaming agents wastewater is a high-strength ammonium industrial wastewater containing many complex components, which is very difficult to treat. In this paper, ADC foaming agents wastewater produced by Jiangsu Suopu Chemical Industry Company Ltd. was taken as the research subject and treated by the combined technology （physical chemistry pretreatment technology and biochemistry treatment technology） .This paper involves two experimental phases.In the first experimental phase, ultrasonic stripping technology was adopted to treat the artificial wastewater. Ultrasonic stripping technology is a new-type and high efficient method to get rid of high concentration of ammonia nitrogen in wastewater. This way derives from combining the traditional amimonia stripping technology with ultrasonic, based on the traditional ammonia stripping treatment. In this experiment, the effects of pH value, initial ammonia nitrogen concentration, temperature and ultrasonic stripping time on the ammonia nitrogen removal efficiency were studied. The study indicated that under the condition of low initial ammonia nitrogen concentration, the ammonia nitrogen removal efficiency was not high. Under the condition of high initial ammonia nitrogen concentration, the ammonia nitrogen removal efficiency was much better than that of low concentration, the highest removal efficiency nearly arrived at 90%, i.e., with the increase of initial ammonia nitrogen concentration, the ammonia nitrogen removal efficiency was increased, and when pH value reached 11, the highest efficiency was achieved; When pH value was around 11, the ammonia nitrogen removal efficiency was increased with the rise of temperature and ultrasonic stripping time. At the same time, the optimized process conditions for ammonia nitrogen wastewater through the ultrasonic stripping are pH of 11, temperature of 30℃, stripping time of 80min.Under the optimized process conditions, a good treat result on the real ADC foaming agents wastewater was gained by ultrasonic stripping and under the condition of high initial ammonia nitrogen concentration, the ammonia nitrogen removal efficiency beyond 75%, even to 90%. In the second experimental phase, the A/DAT-IAT （Anoxic / Demand Aeration Tank-Intermittent Aeration Tank） technology was combined with the shortcut nitrification-denitrification technique to treat the ADC foaming agents wastewater. The experimental results indicated that it was possible to realize shortcut nitrification-denitrification biological nitrogen removal in A/DAT-IAT process by keeping the DO concentration at a low level （1.0mg/L） and a good treatment result on the ADC foaming agents wastewater was obtained. When A/DAT-IAT system ran properly and the average concentration of inlet ammonia nitrogen was 280.1mgNH₄⁺-N/L, the average concentration of outlet ammonia nitrogen was only 12.3mgNH₄⁺-N/L which means a nitrogen removal efficiency over 95%; It could realize shortcut nitrification in DAT when the DO concentration was low. It could restrain the growth of nitrite oxidize bacterium and keep the nitrite accumulation at a high level （the average nitrite accumulation ratio was 82.1%, even over 90%）; There was no effect on the shortcut nitrification in DAT which had been formed under the condition of low DO, either by reducing the inlet ammonia nitrogen concentration or by increasing the DO concentration; There was no sludge bulking take place under the condition of low DO in A/DAT-IAT, and the SVI maintained at a proper level of 90～125mL/g which means a good sludge settleability.更多还原