Active Last updated: 09.09.2020
End: dec 2021
Start: jan 2017

Optimal utilisation of waste resources will be indispensable in the future bioeconomy. In this strategical institute programme, we aim at contributing to the future bioeconomy by providing new knowledge on sustainable use of waste resources as fertiliser in agriculture.

Status Active
Start - end date 01.01.2017 - 31.12.2021
Project manager Eva Brod
Division Division of Environment and Natural Resources
Department Bioresources and Recycling Technologies
Budget this year NOK 3.15 mill
Funding source Norwegian Research Council (Grant number 194051)

Even though organic waste resources can contain large amounts of nutrients, which can be utilised for the production of new crops, currently they are not efficiently recycled. 

Waste resources are complex materials that are strongly varying in terms of composition, quantity and quality. Several barriers will have to be overcome to realise efficient nutrient cycling.

One of them is the large geographical distance between areas with nutrient surplus and areas in need of nutrients. To utilise nturients in waste resources, they have to be transported to where they are needed.

Large amounts of water in many waste resources, however, results in transport being costly and unsustainable, as well as in difficulties related to handling and application as fertiliser

Also, unknown quality of waste resources as fertiliser is often hindering efficient and environmentally friendly use.

Waste resources can contain environmental pollutants and pathogenic microorganisms. Especially microplastics have lately received gained focus.

Also, acceptance of waste resources as fertiliser by farmers is unknown, and nutrient recycling can lead to environmental problem shifting.

In this project we aim at providing new knowledge to contribute to solving these challenges, and to promote the sustainable use of organic waste resources as fertiliser in agriculture. 

The project is divided into 5 work packages:

Work package 1: Sustainable concentration/separation of nutrients

- Work package 2: Use of organic waste resources as fertiliser

- Work package 3: Microplastics and other undesirable components

- Work package 4: Socioeconomic barriers and decision support

- Work package 5 is dedicated to project coordination and dissemination. Work package leader: Eva Brod

Cristin-project-ID: 539607

Publications in the project

Abstract

Vi har alle hørt om problemene plast i havet kan føre med seg. Men plast havner også i jord, blant annet via avløpsslam, biogjødsel og fra plastbruk i landbruket. Akkurat hvor mye plast det er snakk om er imidlertid uvisst.

Abstract

Vi har alle hørt om problemene plast i havet kan føre med seg. Men plast havner også i jord, blant annet via avløpsslam, biogjødsel og fra plastbruk i landbruket. Akkurat hvor mye plast det er snakk om, er imidlertid uvisst.

Abstract

Vi har alle hørt om problemene plast i havet kan føre med seg. Men plast havner også i jord, blant annet via avløpsslam, biogjødsel og fra plastbruk i landbruket. Akkurat hvor mye plast det er snakk om, er imidlertid uvisst.

To document

Abstract

The blackwater stream of domestic wastewater contains energy and the majority of nutrients that can contribute to a circular economy. Hygienically safe and odor-free nutrient solution produced from anaerobically treated source-separated blackwater through an integrated post-treatment unit can be used as a source of liquid fertilizer. However, the high water content in the liquid fertilizer represents a storage or transportation challenge when utilized on agricultural areas, which are often situated far from the urban areas. Integration of microalgae into treated source-separated blackwater (BW) has been shown to effectively assimilate and recover phosphorus (P) and nitrogen (N) in the form of green biomass to be used as slow release biofertilizer and hence close the nutrient loop. With this objective, a lab-scale flat panel photobioreactor was used to cultivate Chlorella sorokiniana strain NIVA CHL 176 in a chemostat mode of operation. The growth of C. sorokiniana on treated source-separated blackwater as a substrate was monitored by measuring dry biomass concentration at a dilution rate of 1.38 d−1, temperature of 37 °C and pH of 7. The results indicate that the N and P recovery rates of C. sorokiniana were 99 mg N L−1d−1 and 8 mg P L−1d−1 for 10% treated BW and reached 213 mg N L−1d−1 and 35 mg P L−1d−1, respectively when using 20% treated BW as a substrate. The corresponding biomass yield on light, N and P on the 20% treated BW substrate were 0.37 g (mol photon)−1, 9.1 g g−1 and 54.1 g g−1, respectively, and up to 99% of N and P were removed from the blackwater.