摘要
研究了磁场对优势菌去除Cr（Ⅵ）生物系统出水pH与ρ（CODCr）以及产气中ρ（H2S）,ρ（NH3）,ρ（H2）,ρ（CH4）,ρ（CO2）和ρ（VOCs）的影响.结果表明：磁场系统（系统B）出水pH均比无磁系统（系统A）略低 系统B对CODCr的消耗效率明显高于系统A 磁场的引入能抑制H2S和NH3的产生.在初始ρ〔Cr（Ⅵ）〕从30 mg/L增至60 mg/L时,系统A和B产气组分中的ρ（H2S）和ρ（NH3）均有所增大,增幅分别为28.67%-32.87%和62.65%-70.89% 初始ρ〔Cr（Ⅵ）〕为30 mg/L时,系统B产气中的ρ（CH4）为系统A的3.1倍,其ρ（CO2）比系统A高33.33%,ρ（VOCs）比系统A低14.75% 初始ρ〔Cr（Ⅵ）〕增至60 mg/L时,两系统产气中的ρ（CH4）相等,ρ（CO2）均有所下降,ρ（VOCs）均明显升高.两系统产气中均未检出H2.从生理生化过程角度分析了磁场影响厌氧产气过程的机理.
The effects of a magnetic field on the pH and CODe, mass concentration in the drain water and on the mass concentration of H2S, NH3 , Ha , CH4, CO2 and VOCs in the biogas from a dominant bacterium Cr（ Ⅵ ） removal biosystem were investigated. The results showed that the final pH in system B with a magnetic field was slightly lower than that in system A without a magnetic field, whereas the CODcr removal rate of system B was significantly higher than that of system A. The introduction of a magnetic field was found to restrain the production of H2S and NH3. It was observed that, with an increase of the original Cr（ Ⅵ ） mass concentration from 30 mg/L to 60 rag/L, the outputs of H2S and NH3 from both systems increased by 28.67%-32.87% and 62.65%-70.89%, respectively. When the original Cr（Ⅵ ） mass concentration was 30 mg/L, the mass concentrations of CH4 and CO2 in the biogas from system B were 210% and 33.33% higher, respectively, than those from system A, while the VOCs mass concentrations of system B were 14.75% lower than that of system A. When the original Cr（ Ⅵ ） mass concentration was increased to 60 mg/L, it was found that in both systems the CH4 mass concentrations in the biogas were equal, and the CO2 mass concentrations obviously decreased while the VOCs mass concentrations increased. Additionally, H2 was not detected in either system during the test period. The mechanism by which the magnetic field affects anaerobic biogas production was illustrated in this paper from the viewpoint of the anaerobic physiological-biochemical process.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2009年第12期1482-1488,共7页
Research of Environmental Sciences
基金
国家自然科学基金项目(40801194)
广东省自然科学基金项目(0500823)
关键词
磁场
Cr(Ⅵ)
厌氧
臭气控制
产气组成
magnetic field
chromium（Ⅵ）
anaerobic
odor control
biogas composition
作者简介
许燕滨（1975-），女，福建闽侯人，副教授，博士，从事环境生物技术的研究与教学，hopeybxu@tom．com
