CAJ | 학술논문

向钢铁冶金高浊废水中复配投加聚合氯化铝和膨润土,以浊度、COD_(Cr)的去除率为指标,通过对投加顺序、pH值、投加量、温度、搅拌速度、搅拌时间、原水浊度等因素的考察,确定合适的工艺条件.结果表明:在pH值为12,搅拌速度为200r/min,搅拌20min的条件下,先投加膨润土,后投加聚合氯化铝,膨润土和聚合氯化铝投加量分别为150和5mg/L,对于COD_(Cr)值在180～220mg/L范围内、浊度为9250～9480NTU范围内的钢铁高浊度废水,COD_(Cr)去除率可达80%以上,浊度去除率达到99.9%以上.处理效果优于膨润土和聚合氯化铝单独投加,且具有良好的经济性,为钢铁冶金废水的处理提供一种新思路,具有实际生产意义.
향강철야금고탁폐수중복배투가취합록화려화팽윤토,이탁도、COD_(Cr)적거제솔위지표,통과대투가순서、pH치、투가량、온도、교반속도、교반시간、원수탁도등인소적고찰,학정합괄적공예조건.결과표명:재pH치위12,교반속도위200r/min,교반20min적조건하,선투가팽윤토,후투가취합록화려,팽윤토화취합록화려투가량분별위150화5mg/L,대우COD_(Cr)치재180～220mg/L범위내、탁도위9250～9480NTU범위내적강철고탁도폐수,COD_(Cr)거제솔가체80%이상,탁도거제솔체도99.9%이상.처리효과우우팽윤토화취합록화려단독투가,차구유량호적경제성,위강철야금폐수적처리제공일충신사로,구유실제생산의의.
Compound coagulant polyaluminium chloride (PAC) and bentonite is used to dispose the high turbidity steel wastewater, and with the removal rate of turbidity, COD_(Cr) as the index, the related factors are determined, such as the dosing sequence, the pH value, the dosage, the temperature, the stirring rate, the stirring time, the raw water turbidity, and appropriate process conditions. Through a large number of trials, the results show that in the appropriate condition, the pH value is 12, the stirring intensity is 200r/min, for 20min, the dosing .sequence is first bentonite and then PAC, bentonite and PAC dosages are 150 and 5mg/L, respectively, raw water COD_(Cr) between 180 and 220mg/L, turbidity range is 9250～9480NTU, the removal rate of turbidity, COD_(Cr), can reach 80% and 99.9%, respectively. The treatment effect with the compounded coagulant is better than bentonite and PAC being used alone, and compared with other treatment methods, this treatment has a good economical efficiency and provides a new treatment for the steel wastewater.