Background
A regional wastewater treatment facility in Australia faced increasing odour complaints from nearby residents due to population-driven expansion. Outdated systems struggled to control hydrogen sulfide (H₂S) and volatile organic compound (VOC) emissions from key process areas, including aeration tanks and sludge handling units. Regulatory pressure and community dissatisfaction prompted the facility to partner with Anotec for a sustainable, cost-effective solution.
Challenges
- High Odour Emissions : H₂S levels exceeded 50 ppm near critical infrastructure, creating nuisance odours.
- Regulatory Non-Compliance : Failure to meet state air quality standards.
- Legacy System Limitations : Existing infrastructure required frequent maintenance, high energy use, and costly consumables.
- Community Relations : Over 200 formal complaints in six months threatened future operational approvals.
Solution
Anotec performed a detailed site assessment using advanced dispersion modeling and gas detection technology to identify emission sources. The customized solution included:
- Multi-Stage Treatment System :
- A chemical treatment process for targeted H₂S removal (achieving >95% efficiency).
- Organic media-based systems to break down residual odorous compounds effectively.
- Perimeter Mitigation :
- Strategically deployed misting units releasing natural neutralizing agents to address fugitive emissions.
- Monitoring Using Level 1 Techniques :
- Regular on-site inspections by trained personnel using olfactometry (sensory assessment) and handheld gas detectors to measure H₂S and VOC concentrations.
- Visual inspections of critical process areas to ensure proper operation and identify potential issues early.
Implementation
- Phase 1 (Weeks 1–4) : Installation of treatment units integrated with existing infrastructure.
- Phase 2 (Weeks 5–8) : Deployment of perimeter misting stations to capture stray odours.
- Phase 3 (Weeks 9–12) : System calibration and operator training for ongoing management.
- Outcome : Completed ahead of schedule, $150K under budget, with no disruption to operations.
Results
- 98% Reduction in H₂S : Levels dropped from 50 ppm to <1 ppm.
- Full Compliance : Met regulatory requirements within six weeks.
- Community Satisfaction : Complaints decreased by 92% in three months.
- Operational Efficiency : 30% lower energy costs; consumable expenses reduced by half.
- Sustainability : Extended media lifespan (5+ years) minimized waste and environmental impact.
Client Testimonial
“Anotec’s solution resolved our odour issues while aligning with our sustainability goals. Their approach restored community confidence and ensured long-term compliance.”
— Operations Lead , Regional Wastewater Facility
Conclusion
Anotec’s holistic strategy combined advanced treatment technologies, proactive mitigation, and data-driven management to deliver a scalable odour control solution. The project achieved environmental compliance, enhanced community relations, and established a model for efficient wastewater management.
Explore Anotec’s odour control expertise at www.anotec.com.au .
Case Study || info@anotec.com.au |