A novel thermophilic two-ring bioreactor was employed to produce biohythane from palm oil mill effluent(POME)using Thermoanaerobacterium thermosaccharolyticum PSU-2 and thermophilic methanogenic mixed cul-tures.The re...A novel thermophilic two-ring bioreactor was employed to produce biohythane from palm oil mill effluent(POME)using Thermoanaerobacterium thermosaccharolyticum PSU-2 and thermophilic methanogenic mixed cul-tures.The reactor system demonstrated impressive performance,achieving hydrogen and methane yields of 113.3±15.0 mL/g-VS and 473.0±60.0 mL/g-VS,respectively,with a total biohythane composition of 4.3%H_(2),37.1%CO_(2),and 58.6%CH_(4).The process exhibited high treatment efficiency,with COD and VS removal efficiencies reaching 93.7% and 84.3%,respectively.Microbial community analysis revealed the crucial roles of various microorganisms in the biohythane production process.Thermoclostridium sp.,Thermoanaerobacterium sp.,and Anaerobranca sp.were identified as key players in hydrogen production,while Bacteroides sp.and Meth-anobacterium sp.were found to be essential for methane production.The optimization of operating conditions,including pH(5.0-8.0),temperature(55℃),and hydraulic retention time(2 d for H_(2) and 10 d for CH_(4)),significantly enhanced biohythane production efficiency.The techno-economic analysis demonstrated the eco-nomic viability of the thermophilic two-ring bioreactor system,with a net present value of 4,186,000 USD,an internal rate of return of 82%,and a payback period of 1.4 years.These findings highlight the potential of this innovative technology as a sustainable and economically attractive solution for treating POME and simulta-neously producing renewable energy in the form of biohythane,contributing to the sustainable development of the palm oil industry and the mitigation of greenhouse gas emissions.展开更多
采用微波技术测量位移的方法,设计了一种基于开口环谐振器(Split Ring Resonator,SRR)的二维线性位移微波传感器。传感器由定子与动子两部分构成,其中定子由两组不同尺寸的SRR耦合一条传输微带线构成,动子采用单面覆铜的FR-4介质基板制...采用微波技术测量位移的方法,设计了一种基于开口环谐振器(Split Ring Resonator,SRR)的二维线性位移微波传感器。传感器由定子与动子两部分构成,其中定子由两组不同尺寸的SRR耦合一条传输微带线构成,动子采用单面覆铜的FR-4介质基板制成。动子二维移动时两个SRR的谐振频率将发生变化,传输零点也产生对应偏移,从而建立起位移和传输零点的关系。此外通过对SRR加载缺陷地结构,提高了检测灵敏度。经电磁建模和仿真,传感器在1 GHz至3.2 GHz范围内产生两个传输零点,可在x和y方向表征0~6 mm的位移,灵敏度分别为122 MHz/mm和82 MHz/mm。制作并测试了传感器实物,实测与仿真的数据基本吻合,证实了该传感器设计的有效性。展开更多
基金the Royal Golden Jubilee Ph.D.Grant[2.B.TK/60/A.1]the National Research Council of Thailand(NRCT)through the Talented Mid-Career Research Grant(Grant No.N41A640088the Graduate Education Development Fund for the Fiscal Year 2021 for their generous financial support,which made this research possible.
文摘A novel thermophilic two-ring bioreactor was employed to produce biohythane from palm oil mill effluent(POME)using Thermoanaerobacterium thermosaccharolyticum PSU-2 and thermophilic methanogenic mixed cul-tures.The reactor system demonstrated impressive performance,achieving hydrogen and methane yields of 113.3±15.0 mL/g-VS and 473.0±60.0 mL/g-VS,respectively,with a total biohythane composition of 4.3%H_(2),37.1%CO_(2),and 58.6%CH_(4).The process exhibited high treatment efficiency,with COD and VS removal efficiencies reaching 93.7% and 84.3%,respectively.Microbial community analysis revealed the crucial roles of various microorganisms in the biohythane production process.Thermoclostridium sp.,Thermoanaerobacterium sp.,and Anaerobranca sp.were identified as key players in hydrogen production,while Bacteroides sp.and Meth-anobacterium sp.were found to be essential for methane production.The optimization of operating conditions,including pH(5.0-8.0),temperature(55℃),and hydraulic retention time(2 d for H_(2) and 10 d for CH_(4)),significantly enhanced biohythane production efficiency.The techno-economic analysis demonstrated the eco-nomic viability of the thermophilic two-ring bioreactor system,with a net present value of 4,186,000 USD,an internal rate of return of 82%,and a payback period of 1.4 years.These findings highlight the potential of this innovative technology as a sustainable and economically attractive solution for treating POME and simulta-neously producing renewable energy in the form of biohythane,contributing to the sustainable development of the palm oil industry and the mitigation of greenhouse gas emissions.
