Jump to main content

Environmental Engineering

Our vision is to use all organic waste from the food chain and upgrade its quality to produce safe valuable resources for sustainable food production. Simultaneously with the waste being upgraded to valuable resources, the negative environmental impacts can also be minimized. Our work looks towards upgrading wastes such as toilet waste, food waste, animal manure, crop residues, etc. into value-added end products while simultaneously minimizing their environmental impact.

Organic waste

Our research focus is on the organic waste fractions, including food-, toilet-, and abattoir waste and manure. In many low- and middle-income countries other waste fractions from the household, such as plastics and metals that have a monetary value are collected and sold back...


We are developing robust systems for on-site treatment of various wastewater fractions: grey-water (used water from kitchen, showers and laundry), black-water (mixture of urine, faeces and flush water), mixed effluent (grey-water and black-water) and sewage sludge.

Source-seperating sanitation systems

The main nutrients flowing from households come from the toilet. Our research on sanitation systems aims at developing robust and socially acceptable systems that safely and effectively utilise the resources available in our excreta...


Many of our organic wastes streams, particularly toilet and animal waste, contain nutrients and organic matter useful for agricultural production. However, they also contain pathogenic micro-organisms (pathogens). Before these resources are returned to...

Socio-Technical system analysis

The global movement for sustainability has led to increased interest in resource recovery from waste systems. However, recovering resources increases the complexity of these systems through additional requirements on technical processes and the increasing the number of stakeholders involved. The increased complexity requires a broader understanding of interactions between technology and society. How can resource recovery systems contribute to sustainable development and to achieve environmental goals? What transformations are needed in the way users are involved, technology is developed and organizations are managed? This research attempts to answer these questions using a transdisciplinary approach for analyzing socio-technical systems.


Published: 28 September 2022 - Page editor: maria.bywall@slu.se