Cleaner water for future generations
EnviDan specializes in environmental solutions within water resources, water supply, climate, energy and waste water. EnviDan has been on the market since 1995, and has build up an significant experience and knowledge in the environmental sector.
EnviDan was originally established to aid the Danish municipalities in all aspects of wastewater treatment, including the construction of wastewater treatment plants and full-scale sewer systems. We also offer a range of software solutions with the purpose to optimize and assure the quality of data and work flows in utility companies and municipalities both within the water and the wastewater business.
We have approx. 200 employees in four offices in Denmark, one i Sweden and one in Norway. The employees consists of a mixture of young graduates and highly experienced personnel.
In 2011, the water utility TREFOR Vand carried out an analysis of its water loss to address its high NRW issue. Afterwards, an action plan for 2012-2014 was developed using the IWA methodology. The action plan included implementation of KeyZones, pressure management, active leakage detection and optimisation of operation procedures. All mechanical meters have been […]
EnviDan has implemented the Activated Return sludge Process (ARP) at Bjergmarken WWTP in Roskilde. The ARP is used to increase the organic capacity, and thus prevent an otherwise necessary expansion of the plant. At Bjergmarken WWTP part of the bioconversion takes place in a separate volume where return sludge is added. This makes it possible […]
In a consortium consisting of EnviDan, Jakobsen & Blindkilde and Strøm Hansen, a modern wastewater treatment plant in the municipality of Mariagerfjord is built to replace the current 10 WWTP. The plant is situated in beautiful surroundings north of Hadsund, with scenery views of corn fields and forests, and will also in the future be […]
The city of Seremban in Malaysia experienced more than 40% water loss in its distribution system. A Non-Revenue Water master plan was developed and implemented in an area with 60,000 connections – setting the way forward to make a permanent NRW reduction and securing a return on investment in just 26 months. Major investments in […]
EnviStyr Web is a unique web and module-based online monitoring system which integrates easily with all SCADA-systems. EnviStyr Web provides an overview of energy optimization, and with EnviStyr Web it is possible to monitor energy consumption and use the calculated key figures for ongoing comparison/ benchmarking. Also EnviStyr Web follows NH4 and NO3 in the […]
New technology makes it possible to map water and minerals from the air In Southeast Asia, Malaysia, EnviDan has used airborne technology for very large geophysical surveys of groundwater. These involved flying over 15,000 kilometres (9,000 miles) in 30-40 kilometres (18-25 miles) long parallel tracks, covering an area of 3,000 square kilometres (1,100 square miles). […]
In order to identify the possibilities for reducing non-revenue water in Hanoi, EnviDan has conducted a feasibility study, which points out the way forward in relation to NRW-reduction. The focus of the study has been to find the current Non Revenue Water (NRW) level and to make a cost/benefit analysis to improve the existing condition. […]
EnviDan International has successfully conducted an R&D project in China upgrading a wastewater treatment plant for 200.000PE. At the plant in Ma An Shan EnviDan has implemented the ARP process and online control system EnviStyr and test results show significant improvements in effluent quality. With support from the Danish EPA and in cooperation with Aihua […]
Biological phosphorous removal with Side Stream Hydrolysis (SSH) When introducing side stream hydrolysis on a part stream of the return sludge, an easily degradable carbon source is obtained for biological nitrogen and phosphorus removal. The hydrolysis produces easily degradable organic material (VFA) on a small flow of the return sludge with long retention time (20 […]
EnviDan supplies innovative solutions to the challenges regarding overload and bypass of existing plants. We can successfully implement the ARP-process at any WWTP to increase the organic or hydraulic capacity with up to 60% and thereby avoid or limit an expansion. When using ARP, a part of the biological process is moved from the original […]
There are numerous companies located along the River Gudenå in Jutland with core competencies within climate, water technology, and environmental technology. Many are leaders of their field in Denmark and several of them also have a recognised international profile. With water as their focal point, the companies cover a wide range of competencies in: Energy […]
The exploitation of freshwater resources, population growth and the impacts of climate change calls for water management based on sound knowledge and sustainable practices. This White Paper covers the Danish approach to Integrated Water Resource Management and addresses complex water challenges.
As the climate changes and the number and frequency of rainfall events increases, so does the need for intelligent rainwater management solutions. This White Paper presents insight into lessons learned from Danish stakeholders within rainwater management and Sustainable Urban Drainage Systems (SUDS).
Total energy renovation of the treatment plant at Egaa, just outside Aarhus, means that Aarhus Vand is setting new standards for developing treatment plants from energy guzzlers into energy producers. This has happened through entirely new technologies that exploit the green energy-production potentials in wastewater. The topping-out is a milestone in the technological development of […]
25-50% of all distributed water globally is lost or never invoiced due to illegal connections, inaccurate billing systems, inaccurate metering, leakages, deteriorating infrastructure and wrong water pressure management etc. – or in short Non-Revenue Water (NRW). This white paper examines how water utilities can improve efficiency and meet future demand for water by reducing Non-Revenue Water.
Climate change is affecting global rainfall patterns and water distribution. Since there is approximately 100 times more groundwater on Earth than fresh surface water, it makes sense to exploit groundwater as a source of water. The aim of this white paper is to share some of Denmark’s technologies, tools and methods for groundwater mapping and hydrogeological modelling.
On a global scale, less than half of all wastewater is collected and less than one fifth is treated. This has led to severe environmental degradation of many inland and sea waters around the world. This white paper provides lessons learned from Danish stakeholders within wastewater treatment.