RETTEW has extensive experience and has long been a participant in the renewable natural gas (RNG) landscape, helping developers, municipalities, and industries unlock the energy potential of organic waste streams. RNG repurposes organic waste into a renewable fuel source, contributing to a circular and low-carbon economy. Through our expertise in anaerobic digestion and biogas systems, renewable natural gas pipelines, metering and regulation, and virtual pipeline systems, we help communities and businesses convert waste into valuable resources while achieving sustainability goals and energy independence.

We develop comprehensive approaches to managing anaerobic digestion projects from initial assessment through long-term operations, including leveraging cutting-edge technology solutions to optimize biogas production. RETTEW's team uses advanced process modeling, feedstock analysis, and system integration tools to design efficient co-digestion systems that maximize biogas yields from diverse waste streams, including food waste, agricultural residues, and wastewater sludge. Beyond production, we design and implement renewable natural gas pipeline infrastructure, metering systems, and regulation equipment to enable safe and efficient gas delivery. Our virtual pipeline systems expertise enables clients to transport RNG to markets where traditional pipeline connections aren't feasible, expanding access to renewable energy markets.

RETTEW is a leader in the design and permitting of anaerobic digestion systems to meet EPA’s 503 Regulations for Class A Biosolids. This provides numerous options for our municipal partners, leveraging existing infrastructure or expanding to new technologies that improve operational efficiency. Additionally, RETTEW has extensive experience in RNG offtake, whether it's for electrical generation through combined heat and power (CHP) or direct injection through RNG upgrading. We leverage strategic partnerships to deliver comprehensive engineering, procurement, and construction (EPC) solutions for complex projects, providing seamless service integration that eliminates the challenges of managing multiple contractors while maintaining accountability, clear communication, and efficient project execution.

RETTEW's comprehensive technical expertise and deep regulatory knowledge, combined with our commitment to sustainable solutions, empower our clients to harness the transformative potential of anaerobic digestion technology. Together, we deliver innovative carbon-negative energy systems that seamlessly convert waste challenges into valuable environmental and economic opportunities, paving the way for a cleaner, more sustainable future.