title: Potential for nutrient recovery and biogas production from blackwater, food waste and greywater in urban source control systems.
abstract: In the last decades, the focus on waste and wastewater treatment systems has shifted towards increased recovery of energy and nutrients. Separation of urban food waste (FW) and domestic wastewaters using source control systems could aid this increase; however, their effect on overall sustainability is unknown. To obtain indicators for sustainability assessments, five urban systems for collection, transport, treatment and nutrient recovery from blackwater, greywater and FW were investigated using data from implementations in Sweden or northern Europe. The systems were evaluated against their potential for biogas production and nutrient recovery by the use of mass balances for organic material, nutrients and metals over the system components. The resulting indicators are presented in units suitable for use in future sustainability studies or life-cycle assessment of urban waste and wastewater systems. The indicators show that source control systems have the potential to increase biogas production by more than 70% compared with a conventional system and give a high recovery of phosphorus and nitrogen as biofertilizer. The total potential increase in gross energy equivalence for source control systems was 20-100%; the greatest increase shown is for vacuum-based systems.
authors.affiliation: a Water and Environmental Engineering, Department of Chemical Engineering , Lund University , Lund , Sweden.
authors.forename: H
authors.initials: H
authors.lastname: Kjerstadius
authors.forename: S
authors.initials: S
authors.lastname: Haghighatafshar
authors.forename: Å
authors.initials: Å
authors.lastname: Davidsson
mesh_terms: D002947:Cities; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D005246:Feedback; D005502:Food; D005735:Garbage; D007220:Industrial Waste / Q000517:prevention & control; D008697:Methane / Q000096:biosynthesis*; D059027:Recycling / Q000379:methods*; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods
chemical_list: D007220:Industrial Waste; D008697:Methane; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: biogas production; blackwater; nutrient recovery; source control systems; sustainable wastewater management