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Improved energy recovery from dark fermented cane molasses using microbial fuel cells

Frontiers of Chemical Science and Engineering 2014年第1期8卷 43-54页

作者： soumya pandit balachandar g debabrata das Department of Biotechnology Indian Institute of Technology Kharagpur West Bengal India

A major limitation associated with fermenta- tive hydrogen production is the low substrate conversion efficiency. This limitation can be overcome by integrating the process with a microbial fuel cell （MFC） which converts the residual energy of the substrate to electricity. Studies were carried out to check the feasibility of this integration. Biohydrogen was produced from the fermen- tation of cane molasses in both batch and continuous modes. A maximum yield of about 8.23 mol Hz/kg CODremoved was observed in the batch process compared to 11.6 mol Hz/kg CODremoved in the continuous process. The spent fermentation media was then used as a substrate in an MFC for electricity generation. The MFC parameters such as the initial anolyte pH, the substrate concentration and the effect ofpre-treatment were studied and optimized to maximize coulombic efficiency. Reductions in COD and total carbohydrates were about 85% and 88% respectively. A power output of 3.02 W/m3 was obtained with an anolyte pH of 7.5 using alkali pre-treated spent media. The results show that integrating a MFC with dark fermentation is a promising way to utilize the substrate energy.

关键词： dark fermentation biohydrogen microbialfuel cell volatile fatty acid anolyte

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Empowering Measures for Quantum Finite Automata（QFA）

Empowering Measures for Quantum Finite Automata（QFA）

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2011 3rd International Conference on Computer Research and Development(ICCRD 2011)

作者： soumya debabrata Pani Chandan Kumar Behera National Institute of Science and Technology

The 1-way quantum finite automata and 2-way quantum finite automata are the first ever developed quantum *** they suffer from many disadvantages which make them less powerful and *** remove these drawbacks there are many ways to modify and aggrandize the quantum finite *** 1-counter with 1-way QFA significantly improve its *** quantum finite automata with quantum and classical states（QCFA）and 2- way quantum finite 1-counter automata（2-QF1-CA）are the quintessence of these *** our paper we first discuss about 1-QFA and 2-QFA and their *** the section IV we introduce an algorithm by implementing 1-way quantum finite k-counter automata（1-QFk-CA）.Then we discuss another algorithm by implementing quantum finite 1- counter automata（QF1-CA）with multiple scanning of the input *** algorithms improve the power of QFAs.

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