Energy Generation from Waste Water Plants

In Egaa treatment plant is planned new technology and process development. The goal is to manage the treatment process, so that the facility will become a net energy producer. The use of multiple technologies in the "150% concept" is including cold Anammox process, a new carbon harvest system, a control system and an ORC (Organic Rankine Cycle) process.

The carbon harvesting and control system are elements of a new, innovative function to ensure an optimal interface between Salsnes filters,  the EssDe ™ - and DEMON ™ process; an interaction resulting in an overall reduction in energy consumption and an increase in energy production.

By optimizing the distribution of the carbon source between energy production and energy consumption, the need for carbon is minimized. Consequently the energy consumption is minimized in the activated sludge process in order to maximize the carbon source that is available to the anaerobic treatment in the digester.

The construction project is concluded agreements between Aarhus Water and consortium "Egaa treatment plant ", consisting of EnviDan and Per Aarsleff. Construction period is 32 months, followed by a verification period of 12 months.

The goal is to document the economic, technical and environmental advantages of the new cleaning process. Result form the basis for a business case.