摘要
利用次氯酸钠处理电镀工业园区污水处理厂的生化出水,研究了反应时间、p H值和次氯酸钠投加量对氨氮去除效果的影响以及ORP的变化规律。结果表明,p H值在6~8之间,反应时间为10 min,次氯酸钠与氨氮的质量比为8∶1和9∶1时,出水氨氮的质量浓度分别小于15和8 mg/L,可满足GB 21900—2008《电镀污染物排放标准》中氨氮排放的要求。ORP变化和次氯酸钠的投加量有较好的规律性,并在实际工程中实现了ORP控制次氯酸钠的自动投加。
Using sodium hypochlorite to treat biochemical effluent water from the sewage treatment plant in an electroplating industrial park, the influence of reaction time, pH value and sodium hypochlorite dosage on am-monia nitrogen removal and variation law of ORP were studied. The results showed that, when the pH value was 6-8, the reaction time was 10 min, the mass ratios of sodium hypochlorite to ammonia nitrogen were 8 颐 1 and 9 颐 1, the mass concentration of ammonia nitrogen in effluent water were lower than 15 and 8 mg/L respectively, which could meet the requirement of GB 21900-2008 Emission Standard of Pollutants for Electroplating about ammonia nitrogen discharge. The variation of ORP was regular as the sodium hypochlorite dosage changed, and automatic dosing of sodium hypochlorite controlled by ORP has already been realized in actual engineering.
出处
《工业用水与废水》
CAS
2017年第5期15-18,40,共5页
Industrial Water & Wastewater
关键词
次氯酸钠
电镀废水
氨氮
氧化还原电位
sodium hypochlorite
electroplating wastewater
ammonia nitrogen
oxidation-reduction potential
