Biohydrogen Production in a Packed-filter Bioreactor using Beverage Processing Wastewater

• Main Authors: Zhang, Jin-Long, 鄭錦隆
• Other Authors: Chen-Yeon Chu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/11660587389381438839

碩士 === 逢甲大學 === 綠色能源科技碩士學位學程 === 103 === The packed-filter media was used in a hydrogen production bioreactor using the beverage processing wastewater as substrate in this study. The seed sludge was from Li-Ming sewage treatment plant in central Taiwan. The results showed that the traditional biohydrogen production reactor reached a hydrogen production rate (HPR) of 2.20 ± 0.51 L/L/d, Yield of 0.28 ± 0.05 mol H2/mol hexose, cell concentration of 1.44 ± 0.27 g VSS/L, in the substrate concentration of 5 g total sugar/L and HRT 1 h. However, at the same operating conditions, the HPR can be reached 11.03 ± 1.22 L/L/d (5 times higher than traditional one), Yield of 0.82 ± 0.07 mol H2/mol hexose, cell concentration of 5.32 ± 0.45 g VSS/L in packed-filter bioreactor (PFBR). When substrate concentration of 20 g total sugar/L and HRT 1 h, packed-filter media placed at the half height position of the PFBR has optimal hydrogen production performance comparison to other locations of bioreactor which hydrogen production rate up to 55.70 ± 2.42 L/L/d, yield to 0.90 ± 0.06 mol H2/mol hexose, cell concentration to 17.86 ± 1.09 g VSS/L. The use of packed-filter media in a bioreactor is more effective in the low substrate concentration by fermentative hydrogen production compared in the no packed-filter media in bioreactor. When the substrate concentration of 10 g total sugar/L, the hydrogen content was from 36.35 to 29.18% while the HPR was from 20.84 to 6.50 L/L/d with the sulfite concentration was from 20 to 80 mg. The biohydrogen production rate was negative affected significantly by the sulfite in the wastewater under the substrate concentration of 5 g total sugar/L when sulfite concentration higher than 40 mg/L. The hydrogen production rate can reach 15.22 ± 0.41 L/L/d, Yield of 0.82 ± 0.01 mol H2/mol hexose, cell concentration of 6.57 ± 0.21 g VSS/L in packed-filter bioreactor (PFBR) using the beverage processing wastewater when operation under 2.5 g total sugar/L, HRT 0.25 h, although within unfavorable sulfite. The PFBR can operate in a very low HRT and high organic loading rate; also can effectively degradation of organic matter in the wastewater. Therefore, the outcomes of this study can be used in the actual application of the general wastewater to extend the application of gaseous energy.