Nutrient recycling from sanitation and energy systems to the agroecosystem - Ecological research on case studies in Karagwe, Tanzania

Krause, Ariane; Kaupenjohann, Martin; George, Eckhard; Köppel, Johann

Nutrient recycling from sanitation and energy systems to the agroecosystem - Ecological research on case studies in Karagwe, Tanzania

dc.contributor.author	Krause, Ariane
dc.contributor.author	Kaupenjohann, Martin
dc.contributor.author	George, Eckhard
dc.contributor.author	Köppel, Johann
dc.date.accessioned	2019-04-11T12:53:20Z
dc.date.available	2019-04-11T12:53:20Z
dc.date.issued	2015
dc.description.abstract	Open cycles of organic carbon and nutrients cause soil degradation. Procedures such as ecological sanitation (EcoSan), bioenergy and Terra Preta practice (TPP) can contribute to closing nutrient cycles and may, in addition, sequester carbon. This paper introduces three projects in Karagwe, Tanzania, and their applied approach of integrated resource management to capture carbon and nutrients from different waste flows. Substrates derived from these case studies, biogas slurry, compost and CaSa-compost (containing biochar and sanitized human excreta), were assessed for their nutrient content by analysis of the total element composition. Evaluation focused on potential impacts of the tested amendments on the nutrient availability in the soil as well as on the local soil nutrient balance. Results revealed that all substrates show appropriate fertilizing potential compared to literature, especially for phosphorus (P). CaSa-compost was outstanding, with a total P concentration of 1.7 g dm-3 compared to 0.5 and 0.3 g dm-3 in compost and biogas slurry respectively. Furthermore, these soil amendments may reduce acidity of the soil, with a calculated liming effect of 3.4, 2.6 and 7.8 kg CaO for each kg of nitrogen added for biogas slurry, compost and CaSa-compost respectively. To offset negative P balances in Karagwe, about 8100, 6000 and 1600 dm3 ha-1 are required for biogas slurry, compost and CaSa-compost respectively. We conclude that especially CaSa-compost might offer immediate positive effects to crop production and nutrient availability in the soil.	en
dc.identifier.eissn	2199-398X
dc.identifier.issn	2199-3971
dc.identifier.uri	https://depositonce.tu-berlin.de/handle/11303/9310
dc.identifier.uri	http://dx.doi.org/10.14279/depositonce-8383
dc.language.iso	en	en
dc.relation.ispartof	10.14279/depositonce-8104
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	en
dc.subject.ddc	629 Andere Fachrichtungen der Ingenieurwissenschaften	de
dc.subject.ddc	577 Ökologie	de
dc.subject.other	ecological sanitation	en
dc.subject.other	bioenergy	en
dc.subject.other	Terra Preta practice	en
dc.subject.other	biochar	en
dc.subject.other	biogas slurry	en
dc.subject.other	compost	en
dc.subject.other	soil amendments	en
dc.subject.other	soil improvement	en
dc.subject.other	waste as resource	en
dc.subject.other	ökologische Abwasserentsorgung	de
dc.subject.other	Bioenergie	de
dc.subject.other	Terra Preta-Praxis	de
dc.subject.other	Pflanzenkohle	de
dc.subject.other	Biogasschlamm	de
dc.subject.other	Kompost	de
dc.subject.other	Bodenänderungen	de
dc.subject.other	Bodenverbesserung	de
dc.subject.other	Abfallressourcen	de
dc.title	Nutrient recycling from sanitation and energy systems to the agroecosystem - Ecological research on case studies in Karagwe, Tanzania	en
dc.type	Article	en
dc.type.version	publishedVersion	en
dcterms.bibliographicCitation.articlenumber	EBC13E356011	en
dcterms.bibliographicCitation.doi	10.5897/AJAR2015.10102	en
dcterms.bibliographicCitation.issue	43	en
dcterms.bibliographicCitation.journaltitle	African journal of agricultural research	en
dcterms.bibliographicCitation.originalpublishername	Academic Journals	en
dcterms.bibliographicCitation.originalpublisherplace	Victoria Island, Lagos, Nigeria	en
dcterms.bibliographicCitation.pageend	4052	en
dcterms.bibliographicCitation.pagestart	4039	en
dcterms.bibliographicCitation.volume	10	en
tub.accessrights.dnb	free	en
tub.affiliation	Fak. 6 Planen Bauen Umwelt::Inst. Landschaftsarchitektur und Umweltplanung::FG Umweltprüfung und Umweltplanung	de
tub.affiliation.faculty	Fak. 6 Planen Bauen Umwelt	de
tub.affiliation.group	FG Umweltprüfung und Umweltplanung	de
tub.affiliation.institute	Inst. Landschaftsarchitektur und Umweltplanung	de
tub.publisher.universityorinstitution	Technische Universität Berlin	en

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