摘要
以模拟废水为研究对象,评价纳米MgO对COD的去除效果。研究了常温下光源类型(避光、自然光、紫外光)、MgO投加量及光照时间等因素对废水COD去除效果的影响。结果表明:在模拟废水COD为140 mg/L条件下,紫外光的作用明显优于避光和自然光条件;随着纳米MgO投加量的增加,COD去除率升高,在紫外光照射3.5 h,纳米MgO投加量为20 g/L时,COD去除率可达73%。在此最佳工艺条件下,养殖废水的COD去除率可达68.15%,达到农业灌溉标准。
Simulated wastewater has been applied to the evaluation of COD removal efficiency by using nano-MgO.The effects of different types of light sources（light-tight,sunlight,ultraviolet） at normal temperature,nano-MgO dosage and light application time on the wastewater COD removal efficiency are studied.The results show that when the COD of simulated wastewater is 140 mg/L,the COD removal rate under UV light is better than that under light-tight or sunlight conditions.The COD removal rate increases with the increase of nano-MgO dosage.When the UV application time is 3.5 h,on 20 g/L nano-MgO,the COD removal rate can reach 73%.Under the optimum conditions,the COD removal rate of livestock wastewater reaches 68.15%.It reaches the mark of irrigation water quality.
出处
《工业水处理》
CAS
CSCD
北大核心
2011年第6期28-31,共4页
Industrial Water Treatment
基金
农业部948项目(2009-Z44)
水体污染控制与治理科技重大专项(2008ZX07425-004-03)
中央级公益性科研院所基本科研业务费专项(2008-ljx-6)
关键词
纳米氧化镁
COD去除率
紫外光
养殖废水
nanocrystalline magnesia
COD removal rate
ultraviolet light
livestock wastewater
