CAJ | 학술논문

研究了磁场对优势菌去除Cr(Ⅵ)生物系统出水pH与ρ(COD_(Cr))以及产气中ρ(H_2S),ρ(NH_3),ρ(H_2),ρ(CH_4),ρ(CO_2)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COD_(Cr)的消耗效率明显高于系统A;磁场的引入能抑制H_2S和NH_3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(H_2S)和ρ(NH_3)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(CH_4)为系统A的3.1倍,其ρ(CO_2)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(CH_4)相等,ρ(CO_2)均有所下降,ρ(VOCs)均明显升高. 两系统产气中均未检出H_2. 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.
연구료자장대우세균거제Cr(Ⅵ)생물계통출수pH여ρ(COD_(Cr))이급산기중ρ(H_2S),ρ(NH_3),ρ(H_2),ρ(CH_4),ρ(CO_2)화ρ(VOCs)적영향. 결과표명:자장계통(계통B)출수pH균비무자계통(계통A)략저;계통B대COD_(Cr)적소모효솔명현고우계통A;자장적인입능억제H_2S화NH_3적산생. 재초시ρ[Cr(Ⅵ)]종30 mg/L증지60 mg/L시,계통A화B산기조분중적ρ(H_2S)화ρ(NH_3)균유소증대,증폭분별위28.67%～32.87%화62.65%～70.89%;초시ρ[Cr(Ⅵ)]위30 mg/L시,계통B산기중적ρ(CH_4)위계통A적3.1배,기ρ(CO_2)비계통A고33.33%,ρ(VOCs)비계통A저14.75%;초시ρ[Cr(Ⅵ)]증지60 mg/L시,량계통산기중적ρ(CH_4)상등,ρ(CO_2)균유소하강,ρ(VOCs)균명현승고. 량계통산기중균미검출H_2. 종생리생화과정각도분석료자장영향염양산기과정적궤리.
The effects of a magnetic field on the pH and COD_(Cr) mass concentration in the drain water and on the mass concentration of H_2S, NH_3, H_2, CH_4, CO_2 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 COD_(Cr) 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 H_2S and NH_3. It was observed that, with an increase of the original Cr(Ⅵ) mass concentration from 30 mg/L to 60 mg/L, the outputs of H_2S and NH_3 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 CH_4 and CO_2 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 CH_4 mass concentrations in the biogas were equal, and the CO_2 mass concentrations obviously decreased while the VOCs mass concentrations increased. Additionally, H_2 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.