SEPURAN

On-site nitrogen generation in wastewater treatment

Evonik is responding to the challenges of today's wastewater management with an innovative approach: The specialty chemicals company wants to specifically dope microorganisms that take over important material conversion reactions in the biological treatment of wastewater with oxygen. In this way, the efficiency of existing wastewater plants can be increased. Evonik is relying on its SEPURAN® N2 hollow-fibre membranes to generate oxygen-enriched air. 

Nitrogen for boosting the efficiency of waste water treatment

According to United Nations figures, more than half of the world's population now lives in cities. By 2050, more than two-thirds of people are expected to spend time in urban living spaces. The unstoppable urban growth raises questions about sustainability, quality of life and scarcity of resources and space. Considering this, intact water management is of vital importance. Evonik's innovative technology for efficient gas separation using membranes shows how this can be optimized for wastewater treatment. 

Modern wastewater treatment plants rely on biology. Microorganisms take on important tasks across various purification stages: Bacteria, fungi and single-celled organisms absorb the components of wastewater into their metabolism and thus purify the wastewater. Evonik can accelerate these processes by specifically optimizing the living conditions of the microorganisms by doping bacteria with oxygen, so to speak, which can be obtain locally using SEPURAN® N2 membrane technology and feed selectively. This enables them to grow faster and work more efficiently.

SEPURAN® N2 membranes for precise control of microorganisms

Based on the same SEPURAN® membrane technology, another gas from the air - nitrogen - can be added to the upstream solids separation to again slow down the growth of the microorganisms. This allows more nutrients from the pretreatment to enter the biology. With Evonik membranes, wastewater treatment plant operators are able to precisely determine the biochemical boundary conditions per wastewater treatment stage. In this way, they can run their processes much more efficiently and expand plant capacities without requiring large-scale construction.

Another gas separation membrane from Evonik-SEPURAN® Green-also makes it possible to purify the biogas that accumulates during wastewater treatment processes into high-purity biomethane and return it to the circular economy. The CO2-neutral gas can be fed directly into the municipal natural gas grid or used as a green fuel (Bio-CNG) to power municipal vehicles.

SEPURAN® N2 membranes for efficient on-site nitrogen generation

By 2050, more than two-thirds of people are expected to spend time in urban living spaces. The unstoppable urban growth raises questions about sustainability, quality of life and scarcity of resources and space.
By 2050, more than two-thirds of people are expected to spend time in urban living spaces. The unstoppable urban growth raises questions about sustainability, quality of life and scarcity of resources and space.
Considering this, intact water management is of vital importance.
Considering this, intact water management is of vital importance.
Evonik's innovative technology for efficient gas separation using membranes shows how this can be optimized for wastewater treatment. 
Evonik's innovative technology for efficient gas separation using membranes shows how this can be optimized for wastewater treatment. 
With Evonik as a partner at your side you will benefit from an unique 360-degree service around the nitrogen membrane itself.. Immediately ready-to-use, fast response time and fast delivery capability.
With Evonik as a partner at your side you will benefit from an unique 360-degree service around the nitrogen membrane itself.. Immediately ready-to-use, fast response time and fast delivery capability.
With Evonik membranes, wastewater treatment plant operators are able to precisely determine the biochemical boundary conditions per wastewater treatment stage. In this way, they can run their processes much more efficiently and expand plant capacities without requiring large-scale construction.
With Evonik membranes, wastewater treatment plant operators are able to precisely determine the biochemical boundary conditions per wastewater treatment stage. In this way, they can run their processes much more efficiently and expand plant capacities without requiring large-scale construction.

Evonik's SEPURAN® N2 membrane has been especially developed for nitrogen generation combining low air consumption at all temperature levels with high nitrogen capacity. Efficient air separation and nitrogen generation with SEPURAN® N2 is especially suitable when spaces are being blanketed to achieve an inert atmosphere. They combine low air consumption with high nitrogen capacity. The benefits for you: you need a small compressor, only a few modules, and operational costs are low. 

NITROGEN CALCULATOR BY SEPURAN®

Use Evonik's SEPURAN® N2 calculator to learn how much nitrogen you can make. Estimate the number and type of membranes you need by inputting the nitrogen flow, temperature, nitrogen purity and pressure. If you need more information, please call or email your local contact. 

..............................................................................................................................................................................

..............................................................................................................................................................................

Get in touch with our experts