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@ARTICLE{CastroHerrera:907192,
author = {Castro-Herrera, Daniela and Prost, Katharina and Schäfer,
Yonas and Kim, Dong-Gill and Yimer, Fantaw and Tadesse,
Menfese and Gebrehiwot, Mersha and Brüggemann, Nicolas},
title = {{N}utrient dynamics during composting of human excreta,
cattle manure, and organic waste affected by biochar},
journal = {Journal of environmental quality},
volume = {51},
number = {1},
issn = {0047-2425},
address = {Hoboken, NJ},
publisher = {Wiley},
reportid = {FZJ-2022-01880},
pages = {19 - 32},
year = {2022},
abstract = {Ecological sanitation via thermophilic composting could be
a promising solution to the lack of sanitation and limited
access to fertilizers, particularly in developing countries.
Here, we conducted a 185-d thermophilic composting
experiment with human excreta, and separately with cattle
manure, mixed with kitchen scraps, teff [Eragrostis tef
(Zuccagni) Trotter] straw, sawdust, and biochar (BC) by
using an appropriate-technology approach. We followed the
dynamics of the most important macronutrients (N, P, K),
temperature, moisture, pH, electrical conductivity, cation
exchange capacity, as well as content of organic matter,
organic C, Ca, Mg, and micronutrients throughout the
process. Low N $(<47\%),$ P $(<9\%),$ K $(<11\%),$ Ca
$(<18\%),$ and Mg $(<21\%)$ losses and the temperature
profile indicated a well-functioning thermophilic composting
process. Compost temperature was >60 °C for 7, 6, 5, and 8
consecutive days for treatments containing human excreta,
human excreta amended with BC, cattle manure, and cattle
manure amended with BC, respectively, suggesting a final
compost product free of pathogens. The compost mixture with
cattle manure and BC reached a significantly higher
temperature than the same variant without BC, with a maximum
value of 65.9 °C on Day 6. For all treatments, final
germination index values $>100\%$ indicated compost maturity
and the absence of phytotoxic substances. Biochar addition
reduced losses of organic matter $(18−23\%),$ C
$(33−42\%),$ and N $(49−100\%)$ and decreased the amount
of extractable NO3− $(32−36\%)$ in the final compost.
The tested ecological sanitation concept via thermophilic
composting is thus a promising strategy to improve access to
cheap fertilizer by safe and sustainable sanitation and
waste management.},
cin = {IBG-3},
ddc = {630},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {2173 - Agro-biogeosystems: controls, feedbacks and impact
(POF4-217)},
pid = {G:(DE-HGF)POF4-2173},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:34846756},
UT = {WOS:000734970600001},
doi = {10.1002/jeq2.20312},
url = {https://juser.fz-juelich.de/record/907192},
}