What is the WATS model?

WATS is the abbreviation of “Wastewater Aerobic/anaerobic Transformations in Sewers". WATS simulates those chemical and biological transformations and associated transport processes that take place in sewer networks, particularly during dry weather flow conditions. WATS is therefore designed to solve problems that are associated with:

	Corrosion of sewer pipes and structures
	Problems related to hydrogen sulfide formation
	Odor problems and ventilation
	Changes in the biodegradability of the wastewater and associated impacts on treatment plant processes, e.g. in terms of denitrification and biological phosphorus removal

Related to these problems, the output of the model simulations is:

	A dynamic analysis of the dry weather performance of a sewer network including aerobic, anoxic and anaerobic interactions
	Control and mitigation of the in-sewer transformations, e.g., to depress hydrogen sulfide buildup
	Process design of sewer networks

The model is based on a conceptual description of the in-sewer physical, chemical and microbial processes. It includes integration of and interaction between those aerobic, anoxic and anaerobic transformations that affect sewer design and management. The model includes water as well as gas phase processes, interactions and transport. The model is designed for stochastic analysis based on process parameter variability.

The model is subject to a continous development based on the scientific results produced by the SPN-Group. The WATS model exists as a beta-version used in our research and by a co-operating consulting firm for sewer design and management purposes. The model is not available in a version that can be applied without a detailed background an it is therefore not for sale.