折点氯化法处理鸟粪石生产废水氨氮的试验研究  

Experimental research on treatment of ammonia nitrogen in wastewater from struvite production by break point chlorination

作　　者：张睿 徐世凯[1] 郭风[2,3] 阮仕平 ZHANG Rui;XU Shi-kai;GUO Feng;RUAN Shi-ping(Nanjing Hydraulic Research Institude,Nanjing 210000,China;Seawater Desalination and Utilization of the Alternative Water Resources Research Center,Hohai University,Nanjing 211100,China;Jiangsu Engineering Research Center on Utilization of Alternative Water Resources,Nanjing 210000,China)

机构地区：[1]南京水利科学研究院,南京210000 [2]河海大学海水淡化与非常规水资源开发利用研究中心,南京211100 [3]江苏省非常规水源开发及利用工程技术研究中心,南京210000

出　　处：《工业用水与废水》2021年第2期30-33,共4页Industrial Water & Wastewater

基　　金：国家重点研发计划(2018YFC0408003)。

摘　　要：为使鸟粪石生产废水中的氨氮达标排放,采用折点氯化法加以处理。通过单因素试验考察有效氯浓度、氯氮质量比、反应温度、反应时间、 pH值对氨氮脱除效果的影响。结果表明:在室温条件下,用有效氯浓度为13.9%的次氯酸钠药剂处理初始氨氮质量浓度为219.14 mg/L的高含盐废水,当pH值为7~8,氯氮质量比为8∶1,反应30 min时,氨氮去除率最高达到96.58%,出水氨氮浓度满足DB 37/3416.5—2018《流域水污染物综合排放标准》中ρ(氨氮)<10 mg/L的排放要求。In order to meet the discharge standard of ammonia nitrogen in struvite production wastewater,break point chlorination process was adopted. The influence of available chlorine concentration, chlorine-nitrogen mass ratio, reaction temperature, reaction time, and pH value on ammonia nitrogen removal was investigated through single factor test. The results showed that, under room temperature, using sodium hypochlorite with available chlorine concentration of 13.9% to treat high salinity wastewater with initial ammonia nitrogen mass concentration of 219.14 mg/L, when the pH value was 7-8, the chlorine-nitrogen mass ratio was 8 ∶ 1, the reaction time was 30 min, the highest removal rate of ammonia nitrogen reached 96.58%, the effluent ammonia nitrogen concentration satisfied the requirement of ρ (ammonia nitrogen) < 10 mg/L in DB 37/3416.5—2018 Integrated discharge standard for river basin water pollutants.

关 键 词：折点氯化法 氨氮废水 海水淡化 次氯酸钠氧化 鸟粪石 浓盐水利用 

分 类 号：X703.1[环境科学与工程—环境工程]