Industrial Vapor Scrubbers & Odor Control Solutions
The Largest Provider of VOC Abatement & Odor Control in North America
Envent Corporation leads the industry in industrial vapor scrubbers. We provide a wide range of VOC and odor scrubbing systems for municipal authorities, large refineries, wastewater plants, manufacturing facilities, and chemical liquid storage terminals.
Our specialized technology is engineered to mitigate the most challenging environmental risks, from toxic H2S concentrations to persistent NH3 odors, ensuring both onsite safety and community goodwill.
Engineering Support for Daily Operations & Turnarounds
Our engineers assist with your daily plant operations, environmental compliance, and scheduled turnarounds. Envent provides turnkey solutions or our proprietary blends of super-absorbing VapoScrub™ chemicals for H2S removal, VOCs, and toxic vapors.
Whether your project requires controlling vapors from a vacuum truck, a high-flow liquid ring “super sucker,” or a refinery tank vent, our team designs a plan to keep you in full regulatory compliance.
Mobile & Skid-Mounted Scrubber Technology
- Vapor Scrubber Setup & Maintenance Full-service rental and operation.
- VapoScrub™ Chemicals Optimized for VOC, Ammonia, and H2S emission control.
- Passive Vapor Scrubbers Models including EVAC 1000, 2000, and BD 8000
- Recirculating Scrubbers High-efficiency units like the ESCRUB 2000 and 6000.
- VaporBite™ Technology Specialized for H2S, VOCs, SOx, and Ammonia.
- High-Volume Blowers Air movement from 100–6000 CFM for odor control
Specialized Equipment & Emergency Response
Odor Control Units
Envent manages the largest fleet of specialized odor control units in North America, maintained in an “Always Ready” state for 24/7 emergency response or planned maintenance. We provide critical support for municipal sewers, digesters, pipelines, and vacuum truck operations where odor mitigation is essential for community relations and worker safety.
Our units utilize a multi-stage approach, often combining chemical scrubbing with high-capacity carbon adsorption to neutralize the most challenging scent profiles, including mercaptans and H2S.
PRODUCT DATA SHEETS
VOC & H2S Scrubbers
The proprietary Escrub™ and EVAC units are the industry standard for high-concentration vapor treatment. Powered by VaporBite™ Technology and specialized VapoScrub™ chemicals, these systems solve the most complex vapor control challenges found in oil fields, refineries, and chemical plants. They are specifically designed to meet the rigorous requirements of Maintenance, Startup, and Shutdown (MSS) permits.
PRODUCT DATA SHEETS
ESCRUB 500-P
ESCRUB 750-P
ESCRUB 1000-P
ESCRUB 1000-1-1S
ESCRUB 1000-1-SS
ESCRUB 2000-SS
ESCRUB 6000-2S
ESCRUB 6000-1-SS
Advanced Vapor Management: When to Use Thermal Oxidation
ASME Scrubber
ESCRUB 2000
What Our Clients Say
Featured Case Study
The Problem: A Puget Sound refinery needed to degas a sour water stripper tank containing 500,000 ppm H₂S during their 2025 turnaround. The tank sat in an active work zone with hundreds of workers nearby, temperatures dropped to 20°F threatening to freeze standard systems, and Washington’s PSCAA Regulation II left zero room for error.
What We Did: Envent deployed a heated H₂S scrubber (ESCRUB-1000) that reduced H₂S from 500,000 ppm to <1,000 ppm, followed by an EMTOS-3500 thermal oxidizer achieving >99.9% destruction at 1,400°F+. Electric heat tracing and insulated tanks prevented freeze-ups in sub-freezing conditions while maintaining 24/7 operation.
The Result: Zero odor complaints, zero safety evacuations, and complete PSCAA BACT compliance. Ambient H₂S stayed below 10 ppm throughout the turnaround. The heated system saved 3+ days versus conventional scrubbers that would have frozen, preventing over $150,000 in delays.
Recent Scrubbers & Odor Control Projects
Explore how Envent’s vapor scrubbing equipment and technicians have successfully managed complex emissions across North America
Industrial Vapor Scrubbers & Odor Control: Frequently Asked Questions
When should I choose a scrubber over a thermal oxidizer?
Scrubbers are ideal for lower-concentration VOCs, specific toxic gases like H2S, and odor control. However, if your vapor concentration or mass exceeds the capacity of liquid media, our engineers will recommend a thermal oxidizer (EMTOS) to ensure 99.99% destruction efficiency for high-load streams.
What is the advantage of VapoScrub™ chemicals over standard carbon?
Activated carbon systems are commonly used for vapor adsorption, but they must be carefully sized to manage heat generation from exothermic reactions when treating certain compounds. In applications with elevated contaminant concentrations or reactive vapor streams, liquid scrubbing systems may provide a more appropriate treatment approach. Envent’s VapoScrub™ systems use liquid media to chemically neutralize targeted contaminants, offering an alternative vapor treatment method when adsorption media may not be suitable for the specific process conditions.
Can your systems handle high-flow vacuum truck operations?
How does Envent manage Maintenance, Startup, and Shutdown (MSS) compliance?
Do you offer 24/7 emergency response for odor complaints?
What is "VaporBite™ Technology"?
VaporBite™ is our specialized approach to chemical scrubbing. It utilizes a specific contact method and proprietary chemical blends to “bite” into and neutralize H2S, VOCs, SO2, and Ammonia, ensuring zero breakthrough even in fluctuating flow conditions.
Are your scrubbers suitable for municipal wastewater applications?
What is the difference between Passive and Recirculating scrubbers?
How do I know when the scrubber media is spent?
Do you provide turnkey service, or just equipment rental?
We provide both. Envent can deliver a complete turnkey solution, including engineering, setup, and OQ-qualified technicians to operate the gear, or we can provide equipment rentals and proprietary VapoScrub™ chemicals for your team to manage.
