單室微生物電解池處理黃水產(chǎn)甲烷
[Abstract]:In order to further excavate the reuse space of yellow water, a stainless steel single chamber microbial electrolytic cell (MEC) was constructed to treat yellow water and realize energy recovery. The effects of different applied voltages (0.4 V ~ (0.6) V ~ (0.8) V ~ (-1) V) on (COD) removal, organic acid degradation, methane production and energy balance during yellow water treatment were investigated with 4% yellow water as substrate. The results showed that the removal rate of COD in MEC was 94.90% 鹵0.70%, 12.90% 鹵0.74% higher than that in control group (82.00% 鹵0.70%). Meanwhile, the removal load of COD was (5.27 鹵0.51) kgm~ (-3) d-1, 1.53 times that of AD (3.45 鹵0.09) kgm~ (-3) d-1. The analysis of methane production rate and organic acid composition in the reaction shows that the methane production rate in MEC is (1818.54 鹵145.77) mLL~ (-1) d-1 when applied 0.6 V voltage. 78.19% more than AD (1014.88 鹵121.44) mLL~ (-1) d-1; When the applied voltage was 0.8 V, the ethanol removal rate in MEC was (102.37 鹵14.65) mgL~ (-1) h ~ (-1), which was 1.79 times higher than that in AD group (57.31 鹵10.45) mgL~ (-1) h ~ (-1). The highest propionic acid concentration in AD group was (1436.10 鹵84.42) mg/L, but the highest propionic acid concentration was (845.57 鹵76.72) mg/L, lower than (590.53 鹵7.73) mg/L. in MEC group with 1.0 V voltage. At the end of the reaction cycle, the residual concentrations of acetic acid and propionic acid in AD were 93.57 and 5.31 times higher than those in MEC (plus 0.8 V voltage), respectively. Finally, the results of energy balance analysis showed that the energy production and net energy generation reached (3.93 鹵0.48) kWhkg~ (-1), (3.80 鹵0.48) kWhkg~ (-1) when the applied voltage was 1.0 V. Compared with AD group (2.92 鹵0.37) kWhkg~ (-1) increased (1.01 鹵0.12) kWhkg~ (-1), (0.88 鹵0.12) kWhkg~ (-1), and MEC obtained more net energy than AD group. The results show that the MEC can effectively promote the efficiency of yellow water treatment and recover methane, and the optimum applied voltage is 0.8 V.
【作者單位】: 中國科學院成都生物研究所;中國科學院大學;四川大學生命科學學院;
【基金】:國家自然科學基金項目(31270166)資助~~
【分類號】:X172;X792
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