摘要
对味精生产整个流程中氨的污染特征进行了定量观测,并对密切相关的因素进行回归分析.结果表明,味精生产流程中各环节都有氨的释放,其年通量达521kg,但不同工艺过程差异较大,在发酵车间氨的释放量最高,平均达880mg.(L.min)-1;而在制糖车间,氨的释放量最小,仅为0.07mg.(L.min)-1.整个味精生产流程中氨的释放通量,与铵态氮浓度之间存在极为显著的直线正相关关系,而与硝态氮(包括亚硝态氮)浓度之间呈显著的指数相关关系;氨的释放通量尽管与其pH变化之间不存在显著的直线相关关系,但味精废水处理过程中却与其溶液中的pH变化之间存在着极为显著的直线相关关系.
Fluxes of ammonia contamination from production of monosodium glutamate （MSG） were quantitatively observed and relationships with some important influencing factors were statistically analyzed. The study indicates that there is a big difference in the release of ammonia at each step of MSG production including sewage treatment, depending on technical processes. The flux of ammonia released in the process of fermentation was highest, up to 880 mg·（L·min）^-1, and that in the process of refining sugar was lowest, only 0.07 mg·（L·min）^-1 Fluxes of NH3 emission during the whole process of MSG production are significantly related with the concentration of ammonium-nitrogen （NH4^-N） in discharged solution linearly, and with concentrations of nitrate-nitrogen （NO3^--N） including nitrite-nitrogen （NO2^--N） in discharged solution exponentially. Although there is no linear relationship between fluxes of NH3 emission during the whole process of MSG production and pH values in discharged solution, it is significantly related with fluxes of NH3 emission during the process of sewage treatment.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2005年第5期105-110,共6页
Environmental Science
基金
国家杰出青年科学基金项目(20225722)
国家基础研究发展规划(973)项目(2004CB418503)
国家科技攻关计划子专题(2003BA614A-10-01)
关键词
氨污染
生物地球化学循环
大气圈
铵态氮
硝态氮
味精废水
ammonia contamination
biogeochemieal cycling
atmosphere
ammonium-nitrogen
nitrate-nitrogen
wastewater containing monosodium glutamate
