Three bioreactors, connected in series, were used to process CELSS potato residues for recovery of resources. The first stage was an anaerobic digestor (8 L working volume; cow rumen contents inoculum; fed-batch; 8 day retention time; feed rate 25 gdw/day) that converted 33% of feed (dry weight loss) to CO2 and "volatile fatty acids" (vfa, 83:8:8 mmolar ratio acetic:propionic:butyric). High nitrate-N in the potato residue feed was absent in the anaerobic effluent, with a high portion converted to NH4(+)-N and the remainder unaccounted and probably lost to denitrification and NH4(+) volatilization. Liquid anaerobic effluent was fed to an aerobic, yeast biomass production vessel (2 L volume; Candida ingens inoculum; batch [pellicle] growth; 2 day retention time) where the VFAs and some NH4(+)-N were converted into yeast biomass. Yeast yields accounted for up to 8% of potato residue fed into the anaerobic bioreactor. The third bioreactor (0.5 L liquid working volume; commercial nitrifier inoculum; packed-bed biofilm; continuous yeast effluent feed; recirculating; constant volume; 2 day hydraulic retention time) was used to convert successfully the remaining NH4(+)-N into nitrate-N (preferred form of N for CELSS crop production) and to remove the remaining degradable soluble organic carbon. Effluents from the last two stages were used for partial replenishment of minerals for hydroponic potato production.


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    Titel :

    Evaluation of an Anaerobic Digestion System for Processing CELSS Crop Residues for Resource Recovery


    Beteiligte:
    Strayer, R. F. (Autor:in) / Finger, B. W. (Autor:in) / Alazraki, M. P. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1997-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch





    Evaluation of an Anaerobic Digestion System for Processing CELSS Crop Residues for Resource Recovery

    Strayer, R. F. / Finger, B. W. / Alazraki, M. P. et al. | British Library Conference Proceedings | 1997


    Effects of Bioreactor Retention Time on Aerobic Microbial Decomposition of CELSS Crop Residues

    Strayer, R. F. / Finger, B. W. / Alazraki, M. P. et al. | British Library Conference Proceedings | 1997