Sales, Design & Project
achieving common goals
how do we succeed
Gas engines
Our unique CHP design offers unmatched serviceability combined with high efficiency →
Gas boilers & burners
NISSEN energy offers a solid range of both gas burners and complete boiler systems →
Gas upgrade
Based on EVONIK’s patented membrane technology, our innovative plant sets new standards in terms of service and operating costs →
Gas treatment
Customized gas pretreatment systems based on gas cooling and filtration via activated carbon →
Gas flares
Through close cooperation with several European suppliers, NISSEN energy offers the Nordic region’s widest range of gas flares →
Global Goals
NISSEN energy supply services and products, which ensures economical, beneficial production of sustainable energy.
More information: About the Sustainable Development Goals.
Relations
“Dialogue is the first tool in our toolbox – together we structure the frames for co-operation…”
Michael B. Nissen
CEO
+45 22 68 65 07
mbn@nissenenergy.com
Need assessment
What must be taken into account? Gas quantity, heat demand, need for electric power, gas quality, gas pressure, emergency operation etc.
From here, installation possibilities and economics.
Components
Determination of components and performance conditions. Size and type of gas engine, boiler and burner. Plus a number of additional options: flue gas exchanger, gas treatment, silencing, gas blower, emergency cooling, flare etc.
Design proposal
3D design and project proposal are prepared. We naturally integrate considerations regarding the work environment, such as noise and vibration, as well as external environmental considerations e.g. emissions of NOx, CO etc.
Installation and project management
We carry out installation of individual components, but also perform turnkey assignments and, full or partial, project management.
Operating strategy
Maintain your investment through well performed service. We tailor service agreements to your wishes and needs.
NISSEN Academy
Knowledge is an important key point. Please contact us and we will share ours.
High-efficient and compact gas engines for CHP plants
Delivery program
“Contact me and get an update on our delivery program …”
Peter Essendrop Petersen
Sales Engineer
+45 22 68 65 23
pep@nissenenergy.com
At our modern production facilities in Skanderborg, NISSEN Energy develops, designs, and manufactures high-quality gas engine systems for efficient and reliable generation of both electricity and heat—also known as CHP (Combined Heat and Power) systems.
Our systems are engineered with a focus on high efficiency, long service life, and low operating costs, making them ideal for biogas plants, wastewater treatment facilities, and larger combined heat and power plants.
Our product range is broad, covering systems from 64 kW of electrical output up to 2,500 kW. This enables us to deliver solutions precisely tailored to each customer’s needs—whether for smaller installations or large, complex energy systems with high demands for capacity and operational reliability.
All our systems are based on gas engines from either MAN or MTU Rolls-Royce—both renowned for German engineering at the very highest level. By combining these robust engine platforms with our Danish expertise, experience, and system design, customers benefit from a strong, thoroughly proven solution in which all components work seamlessly together.
To ensure high quality and full control over the entire process, we build all control panels in our own workshop. This provides both flexibility and the ability to tailor the control system precisely to each individual installation—from simple standard solutions to advanced, customer-specific automation systems.
A gas engine system from NISSEN Energy can either be integrated into an existing building or delivered as a fully prefabricated, turnkey installation housed in a container—our so-called NISSEN PowerHouse. These complete units are constructed, tested, and ready for commissioning upon delivery, ensuring fast and trouble-free on-site installation and a rapid start-up phase.
In other words, we don’t just offer a product—we deliver a complete energy solution where quality, reliability, and Danish engineering expertise go hand in hand.
biogas CLEANING
Why Gas Cleaning?
NISSEN Energy develops and delivers customized gas pretreatment systems that ensure efficient and reliable cleaning of biogas prior to use in gas engine systems, boilers, or upgrading plants. Our solutions combine gas cooling and filtration using activated carbon and are designed to handle the typical challenges associated with biogas production.
Biogas coming directly from the digester/reactor typically has a low pressure of 5–20 mbar and a high moisture content. In addition, the gas may contain siloxanes and sulfur in the form of hydrogen sulfide, depending on the type of biomass used. These substances make the gas unsuitable as fuel for gas engines and can lead to significant operational issues: water reduces the calorific value and affects emissions, siloxanes form harmful deposits on pistons and cylinder heads, and sulfur causes corrosion in heat exchangers and exhaust systems while increasing oil consumption.
To eliminate these challenges, NISSEN Energy offers its own gas treatment systems that ensure effective gas cleaning, allowing downstream equipment to operate optimally and with high reliability. Our systems are always sized and customized to the specific installation to ensure maximum performance and stability.
Gas Cooling – A Crucial First Step
When biogas leaves the digester, it is typically saturated with water vapor and has a temperature between 37°C and 55°C (98°F to 131°F). As the temperature drops, the water vapor condenses and can cause corrosion in engines, pipelines, gas filters, valves, and heat exchangers. At the same time, water vapor negatively affects combustion efficiency.
To ensure high efficiency and avoid downtime, effective gas cooling and removal of condensate are essential. NISSEN Energy supplies gas coolers specifically sized to the required gas flow, ensuring that both gas engines and downstream process equipment operate under optimal conditions.
Our gas cleaning systems are designed with flexibility in mind and can handle varying gas qualities and flow rates. Filtration using activated carbon efficiently removes siloxanes and sulfur compounds, resulting in a consistent, clean biogas ready for stable combustion in gas engines or for processing in a gas upgrading plant.
We support our customers throughout the entire process—from consulting and design to installation and ongoing service—ensuring a solution that maximizes biogas utilization and delivers reliable operation for many years.
With a gas cleaning system from NISSEN Energy, you get more than just gas treatment—you get a carefully engineered, tailored solution that protects your equipment, reduces operating costs, and ensures stable and efficient energy production.
Visualization
“We prepare a design proposal in 3D and ensure, that the available space is used optimally – from here we proceed …”
Rune Hee Malling
Process- & Mechanical Engineer
+45 22 68 65 19
rhm@nissenenergy.com
Supplement
“In addition to our core services, we can handle e.g. authority processing, CE-marking and Health- and Safety …”
Gas- AND OIL BURNERS
At NISSEN Energy, we deliver complete solutions for boiler systems and burner equipment—whether you need a new gas burner, oil burner, boiler, or a modern retrofit solution that upgrades an existing system to meet today’s standards. We combine robust, high-quality products with strong technical expertise to provide a reliable, energy-efficient, and future-proof installation.
We offer consulting, technical advisory, and engineering services—from the initial concept to final implementation. Our sales team is always ready to assist with system sizing, technology selection, and optimal integration into the overall energy system.
Since 1991, NISSEN Energy has been the official distributor of Zantingh gas burners in Scandinavia, Germany, and the UK. Zantingh is internationally recognized for high quality, reliable operation, and efficient combustion, and its burners are used in boiler installations across Europe for biogas, natural gas, and landfill gas applications.
When you choose a boiler system from NISSEN Energy, you receive a solution that can be precisely tailored to your needs. We deliver both compact standard boilers and larger systems for industrial and utility applications. All boiler systems can be combined with modern burner controls, safety equipment, pump stations, and heat exchangers, ensuring maximum efficiency and minimal operating costs.
Whether the system is to be integrated into an existing setup or delivered as a completely new installation, we ensure a smooth and professional implementation. Once installed, we can also provide ongoing service and maintenance—whether for gas burners, oil burners, or complete boiler systems.
Gas UPGRADING PLANTS
In Skanderborg, NISSEN Energy develops and manufactures high-performance gas upgrading systems based on EVONIK’s patented membrane technology. By using SEPURAN® Green – the market’s most efficient membrane – we deliver solutions that set new standards for methane yield, operational efficiency, and uptime.
Our membrane-based systems are designed to deliver a multi-stage upgrading process with a methane yield of over 99.5%. This ensures optimal utilization of biogas while keeping operating costs extremely low. The technology requires no water or chemicals in the process and is engineered for minimal maintenance, providing both high reliability and low service expenses throughout the system’s lifetime.
NISSEN’s gas upgrading systems can be used for a wide range of applications. The upgraded biogas can, for example, be injected into the natural gas grid, directly contributing to the green transition, or used as fuel for vehicles, replacing fossil alternatives. Our systems are flexibly designed and can be scaled or expanded to meet changing needs and increasing gas volumes.
We deliver complete solutions that maximize biogas utilization—from concept and regulatory compliance to final construction, installation, and optimal ongoing maintenance. Each system is tailored to the specific installation site, as no two biogas plants are alike, and we work closely with customers to ensure the best technical and economic solution.
All NISSEN Energy gas upgrading systems are designed and manufactured in Denmark and built around EVONIK’s SEPURAN® Green membrane. The combination of advanced, proven membrane technology and Danish engineering expertise results in a user-friendly, reliable, and highly efficient upgrading system with high uptime and maximum value for the customer.
In other words, we offer not just a gas upgrading system—but a complete, future-proof solution for sustainable biogas utilization.
GAS FLARE
NISSEN Energy offers one of the Nordic region’s broadest and most flexible product ranges for gas flares, developed through close collaboration with several leading European technology suppliers. This wide selection makes it possible to provide flare solutions for any type of biogas or wastewater treatment plant—from simple open flares to advanced, high-efficiency systems for safe and environmentally compliant combustion of excess gas.
Gas flares are a central component of a modern biogas facility, used for controlled combustion during operational disturbances, planned shutdowns, or emergency situations. NISSEN Energy supplies new gas flares designed for high stability, optimal combustion, and low emissions. Each flare is sized and customized for the specific installation, ensuring it matches gas volumes, operating conditions, and applicable regulatory requirements.
In addition to supplying the flare itself, NISSEN Energy also offers complete installation as a turnkey project. This means we can manage the entire process—from planning and foundation work to assembly, connection, and commissioning. The customer benefits from a single point of contact, ensuring an efficient, safe, and coordinated installation without the need for external contractors.
As part of our comprehensive service and safety package, we also provide mandatory inspections, safety checks, repairs, and troubleshooting for existing gas flares. Our specialized technicians have extensive experience with a wide range of manufacturers, ensuring stable operation, high safety, and compliance with environmental regulations throughout the system’s lifetime.
With a gas flare solution from NISSEN Energy, you receive not just a product, but a robust, installed, and fully integrated system that functions as a reliable part of the facility’s overall operation and emergency preparedness.
Quality is a part of our DNA
NISSEN energy ensures quality in our products, processes and services
through our ISO 9001: 2015 certification, audited through Bureau Veritas.
Furthermore, our products are UL-certified (if requisted).
· Gas engine-unit (CHP)
· Gas upgrading
· Gas cleaning
· Flares
· Commissioning & maintenance on larger burners
· Maintenance, repair and overhaul of gas engines
· Process equipment
· Safety check on gas installations
· Electrical installations
Read more: https://nissenenergy.com/en/certificates/