Ammonia removal is an important aspect of biological nutrient removal in wastewater treatment processes. However, due to process constraints, inhibiting compounds or more stringent discharge standards the ammonia removal rate can be insufficient. Subsequently, there is an increased need to optimize the functioning of existing treatment facilities. Addition of Archaea bio-systems to wastewater s...

iNTroducTioN The discharge of reactive nitrogen (N) and phosphorus (P) into water bodies is unwanted as it accelerates the process of eutrophication. To avoid discharge of these nutrients, energy and resources in the form of aeration (for nitrification), organic carbon (for denitrification and/or enhanced biological phosphorus removal (EBPR)), and chemical precipitants (e.g., ferric, alum, lime...

Water utilities, commercial and industrial establishments are required to upgrade or install new treatment systems comply with the revised effluent standards issued by Department of Environment Natural Resources – Management Bureau (DENR EMB) which now includes removal monitoring nutrients (nitrogen phosphorus components). One solution is utilize a biological nutrient technology (BNRT) system c...

CLP(BNR) is a constraint system based on relational interval arithmetic and forms part of BNR Prolog /v.4. This is a much more powerful system than previous versions and allows a much wider class of problems to be handled, including discrete domain problems and boolean equations. It is also integrated more closely into Prolog, thus providing for smoother and more exible interaction between Prol...

In this paper we consider the exact WKB analysis of a second-order non-homogeneous linear ordinary differential equation with a large parameter. We give a geometric criterion which guarantees the Borel summability of formal solutions of a non-homogeneous equation; this criterion is described in terms of exact steepest descent paths introduced in [AKT2]. An example related to the BNR equation ([...