Suez has developed a number of sludge drying processes that allow the sludge to be recovered for a multitude of uses as fertilisers co products for composting or as fuel for incineration plants.
Solar sludge drying model.
Solar energy is used to extract water from sewage sludge a simple and cheap process that not only reduces the sludge considerably in terms of volume but also saves truck mileage and c0 2 emissions.
The limits of mechanical sludge drying sometimes create the need for thermal drying by water evaporation.
Solar radiation along with bio drying.
For the largest plant production rate of 25 900 kg sludge hr with ds i i of 22 land requirement for the drying system was 56 of the existing area.
The basic principle of the system is drying of sewage sludge in a glasshouse using the incident solar radiation.
The greenhouses of solar drying for urban residual sludge represent an economic alternative to the classic thermal dryers.
The mole tills the sludge bed bringing the moist sludge to the drying surface.
After mechanical dewatering sludge contains 20 dry solids.
A special sludge turning system performs both spreading and turning of the sludge as well as its transport from one side to the other.
Windrow operation and regular addition of fresh sludge maximize bio drying and promote easy storage of sludge on a 6 months to 1 year cycle in the greenhouse.
Disposal of that sludge which contain 20 dry solids is very difficult without drying process.
The combined sludge turning and transporting system is at the heart of the drying plant.
Total areas occupied by gsds and solar panels at wwtps were equivalent to 0 1 for wwtp 37 to 71 for wwtp 14 of the existing wwtp areas.
Sludge can be dried in batches using a semi continuous process by means of a fully.
The solar sludge drying systems can be erected on a variety of flat or inclined surfaces in a range of climates and can be adapted to retrofit existing drying beds.
Dewatered sludge and drying sludge are mixed and shaped into windrows by the soliamix windrow turner.
Huber solar active dryer srt.
The aim of this study is the modelling with a two scale approach of the.
The huber solar regenerative sludge dryer srt is able to meet the most different specific customer requirements whether as a pure solar dryer or all year round dryer operated with additional heat.
Solar sludge drying excels in fulfilling key economic and environmental goals.
Ventilation with dry air from the outside.
According to a multiplicative model for sludge solar drying developed by seginer and bux 15 a corresponding drying rate between 6 3 and 9 3 kg h 2 o m 2 รก day can be calculated based on the.
As the sludge dries the mole granulizes it into a uniform consistent pelletized end product.
For wwtp 2 production rate of 13 223 kg sludge hr with ds i i of 26 requirement decreased to 18.
The sludge is transported.
