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Leachate Management at a Florida Landfill: Acid Tank Scrubber

Client

Municipal solid waste landfill in Florida. The client is engaged in the collection and treatment of leachate, preparing it for disposal or evaporation.

Production Process

The leachate collected from the landfill contains contaminants and passes through a system that includes:

collection and storage,
dosing of acids or alkalis for neutralization,
evaporation using a specialized evaporator system.

Chemical reagents, such as 31% hydrochloric acid (HCl), are stored in double-walled HDPE tanks and fed into the system using pumps.

Problem

During operations involving acid tanks (filling, draining, dosing), corrosive and hazardous fumes are released, posing a risk of equipment corrosion. Employee protection and compliance with OSHA and EPA standards are required.

Current system component

Each tank is equipped with a wet scrubber. According to the design, it is made of thermoplastics and features a 1/3 HP recirculation pump (TEFC). The system also includes a leak monitoring system, level sensors, pressure sensors, and level switches.

Temperature

The equipment must withstand temperatures up to 120°F (49°C).

Gas/Dust

Primary contaminant: hydrochloric acid (HCl) vapors — 31%, requiring specialized materials such as CPVC, PTFE, or PVDF. The vapor is humid and aggressive and must be neutralized. The scrubber captures the vapors and treats them with a neutralizing spray.

Initial Data

Use of Packed Bed Scrubbers for Emission Control from Acid and Caustic Storage Tanks in Industrial Wastewater Treatment Systems

As part of our industrial wastewater treatment projects, we often encounter the need to not only treat contaminated liquid but also ensure the safe handling of chemical reagents used in the neutralization process. When the natural concentration of pollutants in wastewater is insufficient for effective treatment, acid or caustic chemicals must be added to adjust pH levels and drive neutralization reactions. These chemicals are stored in dedicated tanks.

During tank operations such as filling, draining, or metered dosing, aggressive chemical vapors are often released. These vapors—commonly from hydrochloric acid, sulfuric acid, or sodium hydroxide—pose serious health and environmental hazards.

Our Packed Bed Scrubber Torch-Air at the client's site

Proposed Solutions

To prevent harmful emissions, we install packed bed scrubbers on each chemical storage tank. These scrubbers capture and neutralize vapors directly at the source, ensuring safe air discharge. The core of the scrubber’s effectiveness lies in the type of packing media selected for each specific case.

Wet Scrubber

We use a range of packing materials, including: Pall rings, Raschig rings, Tri-pack media, Intalox saddles, other custom plastic or ceramic packings, chosen based on chemical compatibility, gas flow rates, and fouling potential.
This flexibility in media selection allows us to:

Maximize surface area for gas-liquid interaction.
Minimize pressure drop across the system.
Reduce clogging and fouling, even in long-term or high-load applications.
Achieve high removal efficiency for hazardous vapors.

Results and Benefits

Reliable scrubbing of acid and caustic vapors before release into the atmosphere.
Increased safety for plant personnel and operators.
Full compliance with U.S. environmental and workplace safety standards, including EPA and OSHA requirements.
Enhanced operational safety and reduced risk of chemical exposure.
Long-term system stability and resilience under demanding industrial conditions.

The wet scrubber meets all requirements for air pollution control resulting from the facility's operations. It provides a cleaning efficiency of 99%.

Best Wet Scrubber for Landfills

Tank Vent Scrubber

Performance:
0 — 3 000 cfm

We always perform precise calculations and offer expert assistance in selecting the optimal dust collection or gas cleaning systems, typically completing this process within 1 to 2 days

Head of Engineering,
Vladimir Nikulin

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