Zenviro Tech’s Horizontal Plug-flow Reactor (HPF) provides ideal microbiological conditions to deliver efficient conversion of feedstock to biogas in high-solid and high-organic load applications. The reactor is slowly agitated and constantly heated, maximizing microbial contact with feedstocks and ensuring a high gas yield with a dependable, uninterrupted operation.

Robust Systems Ensure Plant Safety and Continuous Operation

• Steam injection or in-wall heating elements maintain precise and consistent digester temperature loading
• Gas outlet instrumentation measures and controls gas flow to downstream equipment
• Optional double-membrane gas dome or insulated concrete digester roof
• Pressurized access door provides ground-level access and an efficient cleaning cycle
• Access Door can be sized to accommodate vehicles like a skid-steer
• All bearings and seal systems are accessible from outside the digester

Agitator Designed for Performance

• Maximizes microbe contact with minimum foam formation by breaking the feedstock surface level
• Continuously monitors speed and torque with frequency-controlled drive for better control and system stability
• Eliminates need for internal bearings by floating on the digestate surface

Zenviro Tech’s Continuous Stirred-tank Reactor (CSTR) is the anaerobic digestion solution for low solid organic waste. Our reactors have a highly flexible design for varying processing capacity and waste streams including bolted tanks that can be customized to efficiently fit any processing capacity; and a customizable roof that can be installed with steel fabrication and a central, top-down mixer or a double-membrane roof for gas storage.

Design Features:

• CSTRs can be used as main digesters for low solid waste or as a secondary digester used for storing recirculate and capturing biogas from residual organic material.
• The central, top-down mixer for steel roof CSTRs efficiently creates the ideal mixing pattern to maximize heat transfer from the heating coils, homogenize the substrate for consistent gas production, and minimize risk of solids dropping out to the bottom of the digester.
• The gas-tight, double membrane for membrane roof CSTRs creates a buffer between the anaerobic digesters and the gas utilization technology.
• Pressure safety devices and level sensors ensure safe tank operation. For discharge, the CSTR has an unloading valve for filling trucks.
• Pressurized access door provides ground-level access and an efficient cleaning cycle
• Access Door can be sized to accommodate vehicles like a skid-steer

Cost-effective digestate management is an important part of the success of each project. Successful biogas plants both minimize the required volume to remove from the project site and create a value add from the digestate. As a systems integrator, Zenviro Tech is committed to providing the right solution to meet the needs of your plant. We have experience with designing several methods of digestate treatment technology and integrating then into the digestion plant. These technologies range from mechanical dewatering, MBR’s, RO filtration, and composting.

With the right technology processes in place, the digestate can be transformed from a limited system byproduct into a valuable biofertilizer.

Zenviro Tech is your partner as an engineering services provider for plants requiring a custom solution or more detailed project definition. Our team of industrial process experts develop custom operations solutions that maximize flexibility and productivity, minimize costs, and take advantage of hidden sources for energy, revenue, and savings. 

Our engineering team will provide the following services to develop your project: 

• Basic Engineering Package including mass & energy balance, material supply, expected performance 
• Recommendations for plant design & process technology requirements 
• Compliance analysis (if needed) 
• System inputs analysis and recommendations 
• A tailor-made start-up plan 
• Analysis of all relevant operating parameters 
• Recommendations on best-practice plant operation 
• Optimization of plant operation by means of monitoring and analysis 

IBA Members and Partners are market leaders in their respective fields offering technologies that have the combined capability to process virtually any organic waste including livestock, food and green waste and other flexibility for varying operating conditions – generating both renewable natural gas as well as compost and other organic fertilizers.

The global biogas market is in a state of transition, with many different technology companies vying for a piece of a project. The IBA recognized the growing need for an integrated platform solution approach to advance and accelerate the deployment of biogas plans around the world. Investors are looking for projects with guaranteed biogas production, solid performance guarantees and a strong ROI. With its global footprint, expertise, and supply chain, the IBA will lower the inherent risks that developers, investors and EPC’s are facing when developing biogas plants, by lowering project execution risks and improving their bankability.

For more information visit: IBAbiogas.com.