Odor Control & Deodorization Cases
Proven malodor treatment solutions using biological filtration, chemical scrubbing, and multi-stage absorption technologies.
Odor complaints can lead to regulatory fines and community disputes. Explore our completed odor control projects in bio-pharmaceutical and pharmaceutical processing industries.
Our solutions include biological treatment, activated carbon adsorption, and chemical scrubbing — customized for your odor source and local standards.
Pharmaceutical Manufacturer — HCl & SO₂ Odor Treatment
| Pollutants | HCl, SO₂, Dichloroethane |
| Emission Load | HCl ~650 kg/day, SO₂ ~1,100 kg/day |
| Gas Flow Rate | 5,000 m³/h |
| Treatment Process | 2-Stage Acid Absorption → 2-Stage Alkaline Wash → 1-Stage Water Absorption (Tail) |
| Removal Efficiency | ≥ 98% |
A bio-pharmaceutical manufacturing facility discharging corrosive acid gases (HCl, SO₂) along with organic solvents (dichloroethane) at significant mass emission rates. We engineered a comprehensive five-stage wet scrubbing system featuring two-stage acid absorption towers for HCl/SO₂ capture, two-stage alkaline wash towers for residual acidic components, and a final water absorption stage as a polishing step. The cascade configuration ensures each pollutant is targeted at its optimal removal condition, delivering overall efficiency of ≥98%.
Pharmaceutical Manufacturing — Solvent Vapor Odor Control System
| Pollutants | Butanol, MEK (Methyl Ethyl Ketone), Butyl Acetate |
| Inlet Concentration | Butanol < 1,200 mg/m³, MEK < 800 mg/m³ |
| Gas Flow Rate | 30,000 m³/h |
| Treatment Process | Alkaline Scrubbing → Oxidation → Water Wash → Zeolite Rotor → Catalytic Combustion |
| Removal Efficiency | ≥ 96% |
A pharmaceutical processing plant generating complex organic solvent vapors (butanol, methyl ethyl ketone, butyl acetate) required an integrated single-machine solution capable of handling high-concentration intermittent emissions. We delivered a compact all-in-one system combining pre-treatment stages (alkaline scrubbing, oxidation, water wash) to remove water-soluble and oxidizable components, followed by a zeolite rotor concentrator for VOC enrichment, and finally catalytic combustion for deep destruction. This integrated approach achieves ≥96% removal efficiency while maintaining a small footprint suitable for existing facility retrofits.
Bio-chemical Manufacturer — Fermentation Odor (Lactic Acid & Lactide) Treatment
| Pollutants | Lactic Acid, L-Lactide, Organic Vapors |
|---|---|
| Industry | Bio-chemical / Fermentation Processing |
| Gas Flow Rate | 8,000 m³/h |
| Treatment Process | Water Washing → Alkaline Scrubbing → Condensation → Mist Elimination → Activated Carbon Adsorption |
| Removal Efficiency | 98% |
A bio-chemical production facility processing fermentation products, discharging exhaust gases rich in lactic acid vapor and L-lactide — both characterized by intensely pungent sour odors detectable at extremely low concentrations. The odor intensity from these compounds frequently triggers community complaints despite compliance with conventional emission standards. Our multi-stage treatment chain begins with a water washing tower to capture water-soluble lactic acid through absorption, followed by an alkaline scrubber for enhanced removal of partially soluble organic acids. A condensation stage recovers condensable lactide vapors, reducing the load on downstream treatment units. A mist eliminator removes entrained liquid droplets before the final activated carbon polishing stage captures any trace residual organics. This five-stage cascade configuration ensures that even the most odorous compounds are effectively removed, addressing both regulatory compliance and community odor nuisance concerns.
Pharmaceutical Manufacturer — Solvent Odor & Acid Fume Combined Treatment
| Pollutants | Acetone, Butanol (n-Butanol), HCl, Dust |
|---|---|
| Industry | Pharmaceutical Manufacturing |
| Gas Flow Rate | 30,000 m³/h |
| Treatment Process | Multi-Stage Low-Humidity Water Washing → Pre-Treatment → Zeolite Rotor Concentration → CO Catalytic Combustion |
| Removal Efficiency | 99% |
A pharmaceutical manufacturing plant’s production workshop emitting a challenging mixture of strongly odorous solvents (acetone, n-butanol) alongside hydrochloric acid fumes and particulate matter. Acetone and butanol are particularly problematic due to their extremely low odor detection thresholds — community complaints were the primary driver for this project rather than regulatory non-compliance. The high solvent concentration necessitated a concentration-recovery approach rather than direct destruction. Our solution employs multi-stage low-humidity water washing to remove water-soluble components including HCl and capture coarse dust, followed by pre-filtration to protect downstream equipment. The heart of the system is a zeolite rotor concentrator that adsorbs VOCs from the dilute 30,000 m³/h stream and desorbs them into a concentrated stream treated by catalytic combustion (CO) for thermal destruction. This hybrid approach dramatically reduces operating costs compared to direct thermal oxidation of the full flow volume while achieving complete odor elimination.
Chemical Group — Ammonia & Multi-Pollutant Odor Control System
| Pollutants | Dust / Particulates, Ammonia (NH₃), VOCs |
|---|---|
| Industry | Chemical Processing / Manufacturing |
| Gas Flow Rate | 57,000 m³/h |
| Treatment Process | Cyclonic Scrubber (Cyclone Tower) → Packed Bed Scrubber (Filling Tower) → Activated Carbon Adsorption |
| Removal Efficiency | 97% |
A large chemical group’s production facility generating substantial exhaust volumes containing ammonia — one of the most recognizable and offensive industrial odors with its characteristic pungent, irritating smell detectable at parts-per-billion levels — along with particulate matter and various VOCs from multiple process lines. At 57,000 m³/h, this represents one of our higher-capacity odor treatment installations. The treatment train begins with a cyclonic scrubber that simultaneously removes coarse dust particles through centrifugal separation while initiating contact between the gas stream and scrubbing liquid for partial ammonia absorption. The packed bed scrubber that follows provides the primary odor removal stage, where a carefully selected scrubbing solution chemically reacts with and absorbs dissolved ammonia with very high efficiency. Finally, activated carbon adsorbers serve as the polishing stage for any residual VOCs and trace odorants that may have escaped the wet scrubbing stages. The combination of cyclonic and packed-bed technologies offers robust performance across the wide range of pollutant types present in this complex industrial exhaust.
Facing Persistent Odor or Malodor Complaints?
Tell us about your odor source, composition, and emission characteristics. Our engineering team will design a tailored deodorization solution and provide a preliminary proposal within 24 hours.