Publikation in "Sustainability" erschienen

Stakeholder Assessment on Closing Nutrient Cycles through Co-Recycling of Biodegradable Household Kitchen Waste and Black Water between Rural and Urban Areas in South India

Agricultural land degradation, urban migration, increasing food demand and waste, and inadequate sanitation systems all affect farmers, local society, and the environment in South India. Joint recycling of biodegradable secondary household resources to close nutrient cycles between urban and rural regions can address all these challenges and thus several SDGs at the same time. Efforts are being made to this end, but many attempts fail. The central research question is, therefore: how can co-recycling concepts be evaluated in this context?

 

For this purpose, composting plants, biogas fermenters, and a high-tech concept to produce plant charcoal, design fertilizer, and biopolymers are considered. The aim of this study is to evaluate the recycling concepts from the stakeholders’ perspective to avoid gaps between theory and practice. Six expert and one focus group interviews on two successful on-site case studies and 15 online expert interviews with thematic actors were qualitatively evaluated and presented in a social network analysis to identify preferences and indicators for the further evaluation of co-recycling concepts.

 

The results show that the focus is on mature technologies such as compost and biogas.High-tech solutions are currently still in rudimentary demand but will play a more important role in the future.

To evaluate such concepts, seven key indicators and their measured values were identified and clustered into the categories ecological, social, technical, economic, and connective. The results show that this methodology of close interaction with stakeholders and the evaluation of successful regional case studies minimize the gap between practice and theory, contribute to several goals of the SDGs, and thus enable such concepts to be implemented sustainably.

Fendel, V., Kranert, M., Maurer, C., Garcés-Sánchez, G., Huang, J., & Ramakrishna, G. (2022). Stakeholder Assessment on Closing Nutrient Cycles through Co-Recycling of Biodegradable Household Kitchen Waste and Black Water between Rural and Urban Areas in South India. Recycling, 7(4), 49.

https://doi.org/10.3390/recycling7040049

Institut für Siedlungswasserbau, Wassergüte- und Abfallwirtschaft, Universität Stuttgart

Publikation in "Recycling" erschienen

Juli 2022

Publikation in "Sustainability" erschienen

Biopolymer production from wastewater
flow for a cycle-oriented urban water management

Project staff of the TU Kaiserlautern have published an article in the June issue of "Wasser und Abfall", the magazine of the Bund der Ingenieure für Wasserwirtschaft, Abfallwirtschaft und Kulturbau (BWK) e.V. (Association of Engineers for Water Management, Waste Management and Cultural Construction). From the point of view of RUN, the first results of an acidification of black and brown water are shown and compared with industrial wastewater.

 

In laboratory experiments, primary sludge, brown water, black water, brewery and dairy waste water were anaerobically acidified to obtain short-chain organic acids that can be used as substrate for biopolymer production. Based on the acidification results of the respective wastewater streams, potential estimates of biopolymer production capacity for Germany were carried out. 

Thomas Uhrig M.Sc., Julia Zimmer M.Sc., Florian Rankenhohn M.Sc., Prof. Dr.-Ing. Heidrun Steinmetz (2020): Biopolymerproduktion aus Abwasserströmen für eine kreislauforientierte Siedlungswasserwirtschaft, In: Wasser und Abfall, Issue 6/2020.

Department of Resource Efficient Wastewater Treatment

the University of Kaiserslautern

Publication in "Wasser und Abfall"

June 2020

Biopolymerproduktion aus Abwasser-
strömen für eine kreislauforientierte Siedlungswasserwirtschaft

Projektmitarbeiter der TU Kaiserlautern haben in der Juni-Ausgabe von "Wasser und Abfall", der Zeitschrift des Bundes der Ingenieure für Wasserwirtschaft, Abfallwirtschaft und Kulturbau (BWK) e.V., einen Artikel  veröfffentlicht. Aus Sicht von RUN werden die ersten Ergebnisse einer Versäuerung von Schwarz- und Braunwasser gezeigt und mit Industrieabwässern verglichen.

 

In Laborversuchen wurden Primärschlamm, Braunwasser, Schwarzwasser, Brauerei- und Molkereiabwasser anaerob versäuert, um damit kurzkettige organische Säuren zu gewinnen, die als Substrat zur Biopolymerproduktion genutzt werden können. Ausgehend von den Versäuerungsergebnissen der jeweiligen Abwasserströme wurden Potenzialabschätzungen zur Biopolymerproduktionskapazität für Deutschland durchgeführt. 

Thomas Uhrig M.Sc., Julia Zimmer M.Sc., Florian Rankenhohn M.Sc., Prof. Dr.-Ing. Heidrun Steinmetz (2020): Biopolymerproduktion aus Abwasserströmen für eine kreislauforientierte Siedlungswasserwirtschaft, In: Wasser und Abfall, Issue 6/2020.

Fachgebiet Ressourceneffiziente Abwasserbehandlung

der Technischen Universität Kaiserslautern

Publication in "Wasser und Abfall"

June 2020

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