The Model for Analysis of Treatment and Recycling Sludge (MASTAR) has been developed as a prototype to determine the environmental impact and costs of sludge treatment and recycle / disposal routes. The output from the model is used to determine the Best Practice Environmental Option (BPEO) for new and extended sewage treatment works. It can also determine the environmental impact of existing sludge treatment facilities.
As a working prototype MASTAR contains the following treatment processes and sludge disposal options: gravity and mechanical thickening; dewatering; pasteurisation; digestion; drying; incineration; lime addition; Cambi and Biotherm process; transport; recycle to agriculture; disposal to landfill and treatment of sludge return liquors. For each sludge network MASTAR will calculate energy consumed (from electricity, fuel, consumables, construction materials), "Greenhouse" and "Acid" gases and capital and operating costs.
This research adds to the functionality of MASTAR with:
- A range of new treatment processes
- A new final disposal option
- Enhanced geographical user interfaces
- Enhanced reporting features to support negotiations with Regulators and Planning Authorities.
5 major Water Utilities and the Environment Agency worked with WRc to produce the revised MASTAR model and enable users to be confident in producing environmental impact reports.
- Utiliites can rapidly carry out environmental impact studies on a wide range of options for sludge disposal.
- There is a detailed audit trail to provide Regulators and Planning Authorities with confidence in the output.
- The program runs quickly allowing rapid sensitivity analysis using either default, Utility or site specific data to reach the BPEO.