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Developing Guidelines for Decentralised Wastewater Treatment Systems

2016 - 2022 • Bremen Overseas Research and Development Association (BORDA) & United Nations Environment Programme (UNEP)


The development of National Guidelines was one key instrument to facilitate a focused dialogue, for knowledge management, to create awareness, acceptance and capacities. These Guidelines are a reference for more detailed legislation, standards and manuals


In this project the performance of Decentralised Wastewater Treatment Systems (DEWATS) was evaluated, policies and guiding documents were reviewed and National Guidelines were developed in collaboration with key sector actors. The Guidelines were endorsed by the Ministry of Water (Tanzania). In order to operationalize the Guidelines trainings based on the Guidelines were developed and facilitated and the Guidelines were presented on national conferences. In 2021 the Guidelines were translated to Kiswahili. In the third Phase of the project in 2022 the Guidelines were presented on the National Scientific Water Conference (Maji – Scientific Conference) and a one-day conference on Wastewater and Faecal Sludge Management was facilitated to assess the progress since the development of the Guidelines and to develop key next steps for scaling decentralised sanitation solutions.


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© 2022 • Empower Limited • BORDA e.V.

Presentation of Decentralised Sanitation Solutions at Maji-Scientific Conference in Dar es Salaam, 2022

© 2022 • Empower Limited • BORDA e.V.

Working Group Sessions during Wastewater and Faecal Sludge Management Conference in Dar es Salaam 2022

© 2022 • Empower Limited • BORDA e.V.

Participants of the Conference on Wastewater and Faecal Sludge Management in Dar es Salaam, 2022

© 2022 • Empower Limited • BORDA e.V.

Presentation of Decentralised Sanitation Solutions at Maji-Scientific Conference in Dar es Salaam, 2022

Countries of activity

Location of main activity


Developing and operationalizing Guidelines for decentralized wastewater solutions in Tanzania

Contact information

Tim Fettback
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Laura Bright-Davies
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Riccardo Zennaro
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Filter tags

Capacity development Decentralised wastewater treatment (e.g. DEWATS) Enabling environment and institutional strengthening Energy: biogas Gender Highlight on Gender Theme Page International NGO Operation, maintenance and sustainable services Product design and engineering Public awareness, advocacy and civil society engagement Resource recovery Specific to one or several countries Sub-Saharan Africa Technology comparisons Treatment of wastewater or greywater Water (irrigation, process, other)

Attached files

Report on Wastewater and Faecal Sludge Management Conference (Dar es Salaam, 2022) and recommendations to the Draft Water Sector Development Programme Phase Three (WSDP III)

Format: pdf file
Size: 1.75 MB

Monitoring and evaluation of decentralised wastewater treatment projects in Tanzania

Format: pdf file
Size: 4.19 MB

Project fact sheet: Provision of a sustainable wastewater treatment system & biogas provision for a maternity hospital_1

Format: pdf file
Size: 0.87 MB

Project fact sheet: Provision of a sustainable wastewater treatment system & biogas provision for a maternity hospital_EXTENSION

Format: pdf file
Size: 0.59 MB


Bremen Overseas Research and Development Association

BORDA e.V. (Bremen Overseas Research & Development Association) is a German non-governmental organisation, headquartered in Bremen with a network of local partner organisations in more than 20 countries worldwide. Since founded in 1977, BORDA is active in the fields of poverty alleviation, sustainable protection of natural resources and the develops, implements and disseminates decentralised sustainable technologies and social measures for water, wastewater, energy and waste. Currently BORDA is focusing on decentralized sanitation solutions for the poor in peri-urban and urban areas in Africa, Asia and Latin America. To increase access to improved sanitation, BORDA provides demand oriented service packages including decentralised wastewater management solutions (DEWATS) and decentralised solid waste management (DESWAM). BORDA has regional offices in Tanzania, India, Jordan, Indonesia and Mexico. BORDA is mainly supported by the Federal German Ministry for Economic Cooperation & Development (BMZ) and the Hanseatic City of Bremen.

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Tim Fettback (TimF)

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