The main concern of the project is a response to the population growth and the resulting infrastructural problems in the old city areas with septic tanks for treating the wastewater. On the one hand, the infrastructure cannot follow the fast development of urban areas. Additionally, the administration is not able to control the development in a sufficient way. On the other hand, the city is affected by uncontrolled emptying of the septic tanks, inconsistent waste disposal, and pollution of the ground and surface water.

The aim of the project has been the development of an implementation-oriented solution for the renovation of the existing supply and disposal infrastructure with an adapted and integrated infrastructure in the settlement expansion, taking the example of Hanoi City. This had been realised by means of a semi-centralized supply and disposal concept in a rapidly growing city without a sewage system (but with septic tanks), gradually combined with settlement expansions (including waterborne sewage systems).

Important Results

– Within the framework of the research project, a “Semi-centralized Supply and Treatment System” (STS) has been developed. This STS focuses on a district of the city of Hanoi which contains areas of old and new structures and is described as supply area.
– The supply area has been analyzed via a Geographic Information System (GIS). The use of GIS-based analyses enables the reaction to the dynamically changing surrounding conditions and can be adapted to similar urban areas.
– The testing and optimization of the integrated sludge and waste treatment have been carried out at lab scale and pilot plants in Germany and Vietnam. The results of these experiments were the foundation for the concept and dimension of the integrated sludge and waste treatment. Moreover, the energy and the mass flow inside the supply and treatment center (STC) have been optimized.
– Apart from the technical design of all units of the STC and the canal dimensions, the institutional infrastructure was part of the research. The main focus was the sustainable operation of the STC, the development of the transport and operational concept as well as the development of a tariff system.