organic residues to advanced nutrient

Our solutions recover nutrients that would otherwise be lost, protect the environment and conserve valuable resources. We offer sustainable high-performance fertiliser products for sustainable agriculture.

Project 1

abonocare provides multifeedstock conditioning technologies to prepare organic waste for further processing and recycling. We focus on the characterisation of feedstocks and intermediate products, efficient solid-liquid separation, innovative nutrient recovery systems with integrated waste gas treatment and the targeted preparation of solid material for use as specialised soil or soil additives.

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Local volumes have a major impact on how economically viable it is to use organic waste. This leads to a wide range of challenges. Nutrients have to be concentrated and transported away in areas with a surplus. That’s why we use an innovative two-stage separation system with electromagnetic processes and novel flocculating agents to improve the yield of solid material from digestate and recover other fractions for further processing. This provides a sustainable and economically viable system for preparing organic waste for targeted recycling at the point where this waste is created. This separation method produces water containing ammoniacal nitrogen (NH4-N) and hydrogen sulphide (H2S), which needs to be kept out of the groundwater. That’s why we are researching a new method for stripping the ammoniacal nitrogen and hydrogen sulphide from this water. What’s unique about this method is the use of waste gas from combined heat and power (CHP) plants. The new process not only removes NH4-N and H2S from the leftover water, but also removes NOx from the waste gas.

We are also developing and testing robust sampling and analysis methods to help us evaluate organic waste flows. This plays a vital role in making sure that we can manufacture products with reproducible parameters from multi-feedstock systems by allowing us to perform accurate tests both during and at the end of the process. Substance data is added to a database which we use for the targeted and profile-based processing of solids and intermediate products so that they can be transformed into raw materials for the production of specialised soils and soil additives.




What we offer


  • Processes and technologies for the multi-feedstock conditioning of organic waste (high-performance separation and processing of solid material), including analytical monitoring
  • Processes and technologies for producing fertilisers like ammonium sulphate or ammonium nitrate in combination with waste gas purification
  • Waste disposal services with sustainable recycling and production capacities
  • Research and development expertise in the field of nutrient recovery

Project 2

abonocare uses innovative methods to produce low toxicity, nutrient-rich fertiliser and biochar from sewage sludge, sewage sludge ash and digestate.

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We are developing groundbreaking and innovative combustion methods which are the first to combine the combustion process with an integrated hot gas filtration system. This system removes heavy metals from ash fractions and adds phosphorus compounds. This groundbreaking hot gas filtration system can also be adapted for other combustion processes to significantly reduce their impact on the environment.

We use the low-toxicity, nutrient-rich ash produced by this novel combustion method to make efficient high-performance fertiliser and high-purity phosphoric acid using a variety of production methods and technologies. We are also developing hydrothermal carbonisation (HTC) processes and technologies to improve the availability of nutrients locked up in biomass. These innovations make the process of separating nutrients from process water and accumulating these nutrients in hydrochar much more efficient. We are also working on technological solutions for separating and recovering phosphorus which involve shifting the equilibrium in situ during the HTC process to ensure that nutrients are allocated as needed in the end products. Nutrients are then separated out using novel ceramic membranes which we are in the process of developing and testing. The resulting phosphorous-depleted hydrochar can be utilised as a high-grade adsorbent material.

Making sure that the process of drying hydrochar is energy-efficient is a key factor in the overall economic viability of HTC. We are working on hot dewatering-based solutions which make it possible for hydrochar to be mechanically dewatered down to a dry solids content of 75% whilst ensuring that quality remains the same.




What we offer


  • Hot gas filtration processes and technologies for
    combination with combustion processes
  • Processes and production capacity for producing
    standardised fertilisers and phosphoric acid
  • HTC technology for producing innovative
    phosphorus-depleted hydrochar

  • Research and development expertise in
    the field of nutrient recovery

Project 3

abonocare provides processes and technologies for recovering nitrogen from the liquid and gaseous media used in high-rate fermentation and drying systems using a variety of flexible separation and concentration methods.

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We are working on developing modular and highly efficient treatment systems for fermenting organic waste with integrated nutrient fractionation systems to meet the demands of the market. This modular approach extends not only to the raw materials (e.g. bio waste (e.g. food waste, industrial food production waste), HTC wastewater, nutrient-rich poultry manure) but also the fractionation level (processing level) and the fractionation methods used for the end products.

Our unique approach marks the first biogas process to be stable whilst also involving high levels of nutrients/nitrogen and makes the subsequent fractionation process particularly efficient. This approach is based on the two-stage, two-phase GICON biogas process with percolation which makes it possible to produce biogas with a high degree of flexibility and efficiency. Nutrient recovery stages are integrated into this innovative process for fermenting a wide range of materials,

resulting in high-value products like ammonium sulphate liquor (ASL), specialised fertilisers, pure ammonium carbonate salts with no additives and magnesium ammonium phosphate (MAP) with no magnesium chloride.

These high-quality products are made possible through the use of specially designed ceramic membrane contactors and filters which are capable of removing ammonium and ammonia directly from the gas/vapour phase and the liquid phase under even the most demanding conditions. It is these contactors and filters which ensure that the products have a high level of quality and purity.




What we offer


  • Processes and systems to process liquid organic waste and
    create high-quality (fertiliser) products
  • High-quality (fertiliser) products: ASL (25 – 40%),
    adapted specialised N fertiliser solutions (N, N+S, NPK, NPK+S),
    crystalline ammonium carbonate (used in food), crystalline
    MAP fertiliser
  • Research and development expertise in the field of
    nutrient recovery

Project 4

abonocare provides and develops economical, eco-friendly, flexible and uncomplicated processes for producing granular fertilisers and specialised soil blends from secondary raw materials containing phosphorus in combination with other nutrient components. Our technological solutions recover nutrients that would otherwise be lost whilst protecting the environment and conserving valuable resources.

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We are opening up new and sustainable ways to produce specialised soil blends. Our solutions use municipal and agricultural organic waste from a variety of sources to create user-specific specialised soil blends and soil additives with fine-tuned chemical properties and nutrient compositions tailored to meet specific requirements. Our approach uses targeted composting techniques and blending methods, whilst also providing a better overview of the composting process. This results in products with significantly improved characteristics and a consistently high level of quality.

We use a completely novel approach based on fluidised bed technology to transform sewage sludge containing phosphorus into high quality granular fertiliser, providing a solution to the technical issues which previously plagued this process. In the first stage of the process, acid hydrolysis is used to transform the largely insoluble phosphate found in combustion ash into a form with outstanding bioavailability. Additional nutrient components can be added in order to achieve the required nutrient composition. This also provides a consistent level of quality by balancing out the typical variability of combustion ash. The process produces standardised granular fertilisers which are equivalent to the conventional mineral fertilisers currently in use in agricultural settings. In future, these granular fertilisers may be used instead.




What we offer


  • Nutrient recovery systems for waste containing phosphate
  • Processes and technologies for producing specialised soils
    and fertilisers from waste containing phosphate
  • Recycling and production capacities
  • Standardised and customer-specific specialised soils,
    soil additives and high-performance fertilisers
  • Research and development expertise in the field of
    nutrient recovery