Odor Control for Fermentation & Drying ExhaustJiangxiFor Yibang Industrial Co., Ltd.

Background:

The facility generates complex odor exhaust from drying and fermentation processes, including mixed organic smells, fermentation gases, and high-temperature air streams.

The challenges were clear:

1.Odor composition is complex, with both water-soluble and non-soluble organics

2.Strong and persistent odor, difficult to remove completely

3.High inlet temperature affecting treatment stability

4.Need to meet both emission and odor standards

Solution:

Chaori designed a combined wet scrubbing + biological deodorization system.

The front-end scrubber removes soluble pollutants and stabilizes gas conditions, while the biofilter section handles remaining odor compounds through microbial degradation.

To ensure stable biological performance, a dedicated cooling and temperature control section is integrated before the bio stage.

What Makes It Different:

1.Pre-treatment + bio-stage matching design, instead of relying on bio alone

2.Enhanced inlet and airflow structure, improving gas distribution inside large towers

3.Full-contact scrubbing layout, reducing untreated zones

4.Temperature-controlled bio section, keeping microorganisms active and stable

5.Anti-clogging and easy-maintenance design for long-term operation

Results:

1.Significant reduction in complex odor emissions

2.Stable operation despite high temperature and variable gas composition

3.Consistent compliance with emission and odor standards

4.Low operating cost with minimal secondary pollution

Conclusion:

For odor control, the challenge is rarely a single gas — it’s the combination of different compounds and conditions.

By combining pre-treatment and biological degradation in a controlled way, the system achieves stable and efficient odor removal in real operating conditions.