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Recycling plant, human and animal wastes to plant nutrients in a closed ecological systemThe essential minerals for plant growth are nitrogen, phosphorous, potassium (macronutrients), calcium, magnesium, sulfur (secondary nutrients), iron, manganese, boron, copper, zinc, chlorine, sodium, and molybdenum (micronutrients). The first step in recycling wastes will undoubtedly be oxidation of carbon and hydrogen to CO2 and H2O. Transformation of minerals to plant nutrients depends upon the mode of oxidation to define the state of the nutrients. For the purpose of illustrating the type of processing required, ash and off-gas compositions of an incineration process were assumed and subsequent processing requirements were identified. Several processing schemes are described for separating out sodium chloride from the ash, leading to reformulation of a nutrient solution which should be acceptable to plants.
Document ID
19800031083
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Meissner, H. P.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Modell, M.
(MIT Cambridge, Mass., United States)
Date Acquired
August 10, 2013
Publication Date
July 1, 1979
Subject Category
Man/System Technology And Life Support
Report/Patent Number
ASME PAPER 79-ENAS-29
Meeting Information
Meeting: Intersociety Conference on Environmental Systems
Location: San Francisco, CA
Start Date: July 16, 1979
End Date: July 19, 1979
Sponsors: American Society of Mechanical Engineers
Accession Number
80A15253
Distribution Limits
Public
Copyright
Other

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