摘要
研究了臭氧直接氧化对蔬菜废弃物好氧发酵液中8项主要污染物指标的影响。臭氧通量浓度设为1.67 mg/L,曝气时间分别选择30,60和120 min,考察了臭氧氧化对蔬菜废弃物发酵液中pH值、粪大肠菌群、COD、总氮、氨氮、硝态氮、亚硝态氮和总磷的作用效果。结果表明:随着曝气时间的延长,pH值呈不断升高的变化趋势;曝气时间120min,粪大肠菌群被全部去除,COD的去除率为31.7%;臭氧氧化过程中发酵液的各种氮素形态相互转化呈动态变化过程;随着臭氧投加时间的延长,总磷含量会略有上升。
It was studied the effect of ozonitation on the indicators of vegetable wastes aerobic fermentation liquid. When flux of ozone concentration was 1.67 mg/L, aeration time was 30 min, 60 min and 120 min, respectively it was examined the influence of ozonization on pH, fecal coliforms, COD, total nitrogen, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and total phosphorus. With the extension of aeration time, pH value was rising; COD removal rate reached 31.7% , and fecal coliforms were all removed at 120 min aeration time; all kinds of nitrogen was dynamically changed with mutual transformation; the total phosphorus content was increased slightly.
出处
《环境工程》
CAS
CSCD
北大核心
2012年第1期35-38,46,共5页
Environmental Engineering
基金
公益性行业(农业)科研专项经费资助(200903009)
中央级公益性科研院所基本科研业务费专项资金
关键词
臭氧氧化
蔬菜废弃物
发酵液
曝气
ozonidation
vegetable wastes
aerobic fermentation liquid
aeration
