摘要
采用混凝—催化氧化组合工艺预处理氨基C酸生产废水,考察了混凝剂加入量、废水pH、氧化剂加入量、反应时间和催化剂的重复使用次数等因素对废水处理效果的影响。混凝—催化氧化法预处理氨基C酸生产废水的最佳工艺条件为:质量分数为10%的FeSO4溶液作混凝剂,加入量为250mL/L;质量分数为1%的ClO2溶液作氧化剂,加入量为75mL/L;Ni/AC作催化剂,加入量为40g/L;废水pH为3.2;催化氧化反应时间为60min。在该条件下,废水的COD去除率可达78.4%,BOD5/COD由原来的0.076提高到0.292,可生化性得到明显改善。Ni/AC催化剂连续使用7次后仍保持稳定的催化活性。经济性初步分析表明,1t废水的处理成本约为16元。
Wastewater in amine C acid manufacture was pretreated bycoagulation-catalytic oxidation. The effects of coagulant dosage, wastewater pH, oxidant dosage, reaction time and catalyst reuse times on the wastewater pretreatment were investigated. The optimum process conditions were determined as follows- 10% FeSO4 solution used as coagulant and with dosage 250 mL/L, 1% ClO2 solution used as oxidant and with dosage 75 mL/L, Ni/AC used as catalyst and with dosage 40g/L, reaction time 60 rain. Under these conditions, the COD removal is 78.4% , BODJCOD is increased from 0. 076 to 0. 292 improving greatly the wastewater biodegradability. The activity of the recycled Ni/AC catalyst is remained stable after 7 times of reuse. Based on the initial economical evaluation, the cost of treating 1 t of wastewater is about ￥ 16
出处
《化工环保》
CAS
CSCD
北大核心
2008年第3期247-250,共4页
Environmental Protection of Chemical Industry
关键词
混凝
沉淀
催化氧化
氨基C酸
废水处理
coagulation
precipitation
catalytic oxidation
amine C acid
wastewater treatment
