SEE – Schmittel Environmental Engineering GmbH
We make wastewater and energy processes fit fort the future
SEE provides innovative engineering services for wastewater, sewage sludge, and sustainable energy recovery.
Together, we develop sustainable environmental solutions for municipalities and industry.

By practitioners, for practitioners
SEE is a family-owned engineering company specializing in wastewater treatment, sewage sludge management, and energy recovery, combining the experience and innovation of two generations.
Dr.-Ing. Peter Schmittel spent 15 years managing Europe’s largest wastewater treatment plant and sewage sludge incineration facility at BASF SE. Most recently, he led the development of energy transition projects, including a biogas plant and a large-scale heat pump utilizing wastewater as a renewable energy source.
M.Sc. Hannah Mennecke adds a strong background in bioprocess engineering, combining operational expertise with data analytics, process simulation, and machine learning.
This is how we combine proven operational expertise with modern methods, bridging practical plant experience and innovation to deliver sustainable solutions for municipalities and industry.
25 years Industrial Experience in Wastewater, Sewage Sludge, and Energy
4th Generation of Engineers in the Family
Chair of the DWA Expert Committee KEK 3 “Thermal Sewage Sludge Treatment” of the German Association for Water, Wastewater and Waste


Our Strengths
What Sets Us Apart
Operator's Perspective
We have managed a large-scale treatment facility ourselves. That is why our concepts work not only on paper but also in day-to-day operation. We understand what it takes to successfully implement projects.
Engineering Expertise and Regulatory Compliance from a Single Source
As Chair of the DWA Expert Committee KEK 3, Dr. Schmittel contributes to the development of the technical standards and guidelines according to which wastewater and sludge treatment facilities are planned and approved.
Data Instead of Guesswork
We analyze your operational data and simulate different scenarios before you invest. We use machine learning to optimize processes and equipment sizing.
Shape Sustainable Solutions with Us
SEE Schmittel Environmental Engineering delivers innovative solutions for the challenges of environmental technology. Benefit from our expertise and practical experience.