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Latest News on WSI’s International Activities

Third phase of WSI’s “Total School Sanitation Project” in Vinh / Vietnam (2017)


Remarkable progress has been made since the last visit of an WSI expert at the secondary school in the Nghe An province: The toilet building was renovated, the treatment plant showed proper functionality and the school invested in new toilet seats and handwashing facilities. The overall impression of the student’s toilet building was good, although soap is still missing.

 A WSI expert performed numerous teaching lessons on sanitation and wastewater treatment, and further developed respective modules for both students and teachers. The first two teaching modules developed earlier in 2015 were revised for suiting the eighth grade, while a third module was developed concerning hygienic behaviour in order to improve awareness on hygiene and health issues.

Supervised by the WSI expert, the school’s pupils maintained the on-site wastewater treatment plant and learned why sewerage treatment is crucial for public health.

Last but not least, WSI management board members opened negotiations with the provincial Department of Training & Education on next steps in order to integrate more schools into this project. 

School Toilet BuildingSchool Toilet Building 














WSI's International Conference and Poster Exhibition on  Decentralised Wastewater Management - Experience with Long-Term Operations (2017)


Decision makers in many developing and emerging countries are currently considering Decentralised Wastewater Treatment as a cost-effective and reliable alternative to centralised, conventional drainage and treatment concepts. International development banks are increasingly ready to promote and finance this development. However, long-term operational experience has rarely been communicated so far, particularly with regards to financial sustainability and management issues.

Water Solutions International e.V. in cooperation with GIZ, the Helmholtz-Centre for Environmental Research (UFZ), Bildungs- und Demonstrationszentrum für Dezentrale Abwasserbehandlung e.V. (BDZ), German Water Partnership e.V. and Tilia GmbH invited to discuss this issue.  A 2-day-conference (including a field trip) was held in Hanoi / Vietnam in October 2017, hosting more than 120 international speakers and guests.


The conference aimed at:

  • Presenting long-term operating experience with decentralized systems and concepts, and share typical challenges, shortcomings and respective solutions
  • Providing a forum for discussion
  • Promoting international networking on "decentralized wastewater treatment"
  • Promoting the exchange of experiences between countries embarking on the concept of decentralised sanitation

The conference was considered a big success by all partners and guests. The pictures below may give a brief impression:






 Lake Conservation Project / Vietnam (2017)

A WSI expert has been selected by the People’s Committee of Quang Tri Province in central Vietnam to provide professional input to a lake conservation project.

 The lake, which is located in Dong Ha City, still features a diverse fauna and flora, but is threatened by rapid urban development and uncontrolled discharge of wastewater into the water body.

 Following comprehensive fact finding activities, the WSI expert has developed a lake development plan and landscaping concept which ensures the dwellers’ needs for recreation, but also protects the lake’s natural conditions to the largest possible extent.



















WSI now member of BDZ e.V. (October 2016)

WSI has been accepted as a member of the Training and Demonstration Centre for Decentralized Sewage Treatment – BDZ e.V.

 The BDZ is an initiative for the promotion and establishment of decentralized wastewater management, offering an independent platform in the area of decentralized wastewater management, and pools important organisations active in the field of decentralized wastewater treatment technology.

 BDZ unites representatives from businesses, science, politics and administration in a network, bundles the knowledge about decentralized wastewater treatment, educates, and develops knowledge in this field.


WSI currently developing a guideline on school sanitation (2016)

Supported by ATB Umwelttechnologien GmbH, we are currently developing a practical "Guideline on Total School Sanitation", which is supposed to help NGOs, state authorities, consultants and decision makers to embark the approach to comprehensive school sanitation.

 The guideline will be based on WSI's experiences, and will have a modular structure addressing the most relevant issues associated with sanitation measures in schools and comparable institutions. 


WSI members supported options study fort the water and wastewater utilities for climate mitigation (WaCCliM) project Chiang Mai, Thailand (2015)

 Two WSI experts have recently supported The International Water Association (IWA) and Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH in undertaking the project “Water and Wastewater Companies for Climate Mitigation” (WaCCliM) as part of the International Climate Initiative (IKI).

The objectives are to improve the carbon balance of water and wastewater utilities in three countries and to ensure that these companies reduce their operational costs and maintain or improve their services. The project is implemented from December 2013 to January 2019.

In Thailand, the Chiang Mai wastewater system was proposed as the site for the WaCCliM project.

The scope of work for the WSI experts was to provide recommendations to the Chiang Mai Wastewater System managed by WMA, in Thailand, on how to best reduce their carbon footprint per serviced population based on their existing systems and potential plans for future expansion, using a holistic water cycle approach.





















“Total School Sanitation Project” in Vinh / Vietnam developed further (2015)

WSI’s comprehensive solution for school sanitation in developing countries, including construction of toilet buildings, wastewater collection and treatment, IEC and environmental education, has been applied in a second phase in Vinh City, Province Nghe An, Vietnam.

WSI members developed tailor-made teaching modules and carried out several lessons in cooperation with teachers, parents and the school principal.

WSI experts also evaluated and improved the performance of the decentralised wastewater treatment plant operated in the school, and developed guidelines for improved operation and maintenance.

The project aims at developing a fundamental understanding on sanitation and public health problems and solutions among school children, their families, school authorities and neighbouring communities. It is supported by ATB Umwelttechnologien GmbH under a CSR scheme.