中国物理B ›› 2021, Vol. 30 ›› Issue (5): 56103-056103.doi: 10.1088/1674-1056/abd169

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Water and nutrient recovery from urine: A lead up trail using nano-structured In2S3 photo electrodes

R Jayakrishnan1,†, T R Sreerev2, and Adith Varma2   

  1. 1 Department of Physics, University of Kerala, Thiruvananthapuram, Kerala 695581, India;
    2 Photovoltaic Research Laboratory, Christian College Chenagnnur 689122, India
  • 收稿日期:2020-10-02 修回日期:2020-12-04 接受日期:2020-12-08 出版日期:2021-05-14 发布日期:2021-05-14
  • 通讯作者: R Jayakrishnan E-mail:rjk@keralauniversity.ac.in
  • 基金资助:
    R. Jayakrishnan thanks KSCSTE for funding this work under the SPYTiS scheme (Grant No. 25/SPYTiS III/2017/KSCSTE) and also thanks DoECC, Government of Kerala for supporting the work (Grant No. DoECC/E3/R&D/1751/2017).

Water and nutrient recovery from urine: A lead up trail using nano-structured In2S3 photo electrodes

R Jayakrishnan1,?, T R Sreerev2, and Adith Varma2   

  1. 1 Department of Physics, University of Kerala, Thiruvananthapuram, Kerala 695581, India;
    2 Photovoltaic Research Laboratory, Christian College Chenagnnur 689122, India
  • Received:2020-10-02 Revised:2020-12-04 Accepted:2020-12-08 Online:2021-05-14 Published:2021-05-14
  • Contact: R Jayakrishnan E-mail:rjk@keralauniversity.ac.in
  • Supported by:
    R. Jayakrishnan thanks KSCSTE for funding this work under the SPYTiS scheme (Grant No. 25/SPYTiS III/2017/KSCSTE) and also thanks DoECC, Government of Kerala for supporting the work (Grant No. DoECC/E3/R&D/1751/2017).

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摘要： Developments of economic systems are critical for bio-regenerative life support systems in manned space missions. In this work we report on the feasibility of using two direct sunlight powered processes sequentially for the recovery of water and nutrients from urine. The work presents experimental evidence on nutrient and water recovery achieved using the proto-type designed and developed. We report the design and testing of a solar still which would serve on the nutrient recovery front. The cooled condensate from the solar still is fed into a solar powered electrolysis unit where nano-structured indium sulphide (In2S3) thin films coated over fluorine doped tin oxide (SnO2:F) substrate serve as one of the working electrodes. The electrolysis takes place in the absence of an electrolyte which manifests as a technical achievement of our work. Our results show that the COD level in the recycled water is very low. The In2S3 photo-electrodes are stable without any physical damage after the process.

关键词: semiconductors, water quality, thin film structure and morphology, electrolysis

Abstract: Developments of economic systems are critical for bio-regenerative life support systems in manned space missions. In this work we report on the feasibility of using two direct sunlight powered processes sequentially for the recovery of water and nutrients from urine. The work presents experimental evidence on nutrient and water recovery achieved using the proto-type designed and developed. We report the design and testing of a solar still which would serve on the nutrient recovery front. The cooled condensate from the solar still is fed into a solar powered electrolysis unit where nano-structured indium sulphide (In2S3) thin films coated over fluorine doped tin oxide (SnO2:F) substrate serve as one of the working electrodes. The electrolysis takes place in the absence of an electrolyte which manifests as a technical achievement of our work. Our results show that the COD level in the recycled water is very low. The In2S3 photo-electrodes are stable without any physical damage after the process.

Key words: semiconductors, water quality, thin film structure and morphology, electrolysis

中图分类号:  (Semiconductors)

  • 61.82.Fk
92.60.Sz (Air quality and air pollution) 68.55.-a (Thin film structure and morphology) 82.45.Hk (Electrolysis)