Energy production through burning fossil fuels is one of the major contributors to the high levels of greenhouse gasses today. Because of this, industries are now being challenged to reduce their fossil fuel consumption. Therefore, we offer total solutions using agricultural and food residues to provide bioenergy and biofuels and make use of the most efficient technologies. These solutions help to reduce both waste and greenhouse gas emissions. Our solutions provide a full-service, turn-key realization of renewable energy facilities.
Food and Feed Residue Digester
Within our on-site circular solutions we focus on residue streams of the food and feed processing industry that are either small in volume or more difficult to process.
For these more difficult degradable food and feedstock, like horse bedding, high fiber material, mushroom compost etc, we enhance a two stage Anaerobic Digestion system.
The first part of the solution is always to break down the fibrous material fast with a hydrolysis system which saves enormous processing time and therefore reduces investment in the installation considerably.
The two-stage biogas process operates on mesophilic (40 – 43°C) or thermophilic (55°C) temperature to digest food and feed residues and any kind of manure with subsequent electricity generation of the produced biogas.
The system of separated hydrolysis that we use gives a smaller footprint for the plant and is proven to yield up to 30% more biogas per ton of feedstock compared to single phase digesters – especially from fibrous or very energy rich and daily changing feedstock.
The advantages of the 2-stage food and feed residue digester are:
- Up to 20% lower feedstock demand with the same output yield.
- Up to 30% lower feedstock demand for fibrous feedstock
- Energy rich feedstock – double the amount in the ratio without biological acidification
- Higher flexibility with feedstock change
- Smaller tanks and plant footprint due to higher loading rate and shorter retention time
The smallest size we supply is a 25 m3/hr system based on unique containerized modular system up to a larger size system of 1.000 m3 utilizing more common tanks.
Gas Upgrading System
We offer a system for biogas upgrading to a methane-rich gas, also known as biomethane. This unit is able to separate methane from the biogas with a very high efficiency, possibly > 99%, using membranes. After the purification, the quality of the biomethane meets the requirements of natural gas.
With the membrane technology there are no chemicals required for the cleaning of the biogas, there is 99% separation efficiency, and there is minimal methane loss. The biogas is cleaned and compressed to high pressure. Subsequently, the biogas is led through membranes in which the methane separation eventually takes place.
The biogas upgrading system can be used for biogas derived from different types of facilities, such as a co-digestion plant or a sludge digestion plant. The system is profitable for small size biogas plants as well as large-scale biogas plants.
Methane-gas can be used for different purposes. One of the options is to inject the obtained gas into the natural gas network.
Due to the membrane technology, the upgraded biogas meets the requirements for injection into the national gas network. Another option is to use the gas as transport fuel (CNG/LNG) for cars and trucks. The obtained gas is a very clean fuel without particles and is CO2 neutral.
In addition to the production of methane for injection into the grid, we can produce liquid CO2. We can make the gaseous CO2 liquid by a combination of cooling and compression. The advantage of producing liquid CO2 is that not only liquid CO2 is available to sell (to for example: green houses, beverages, cooling applications, slaughterhouses), but also zero methane slip is achieved.