Eco-Efficiency and Circularity
生态效率与循环经济 — Optimizing resource use and minimizing waste across our operations through eco-efficiency principles and circular economy thinking.
Doing More with Less
Eco-efficiency is the cornerstone of our environmental strategy. We strive to create more value with less environmental impact — reducing resource consumption, minimizing waste, and maximizing the utility of every input throughout our production processes.
At Do Sender Chemicals, eco-efficiency means delivering high-quality Perodox® organic peroxides and AZO initiators to customers in 30+ countries while continuously reducing our environmental footprint per ton of product manufactured. This principle guides our investments in process technology, operational excellence, and circular economy initiatives.
Energy Efficiency
Minimizing energy consumption per unit of production through advanced process control, heat integration, and equipment modernization at our Zibo facility.
Water Stewardship
Responsible water management with reduction, reuse, and recycling strategies to minimize freshwater withdrawal and wastewater discharge.
Material Circularity
Closing material loops through byproduct recovery, solvent recycling, and waste valorization to maximize resource productivity.
Water Stewardship
Water is an essential resource in organic peroxide manufacturing, used in cooling, washing, and as a reaction medium. We are committed to responsible water management across our operations.
💧 Water Usage Reduction
We have implemented water-saving measures across our Zibo production facility including:
- Installation of closed-loop cooling systems to reduce once-through cooling water consumption
- Flow meters and real-time monitoring at all major water usage points
- Regular leak detection and repair programs across the facility's water network
- Employee awareness campaigns promoting water conservation behaviors
- Target: 25% reduction in water intensity (m³ per ton of product) by 2030 vs. 2019 baseline
🔄 Wastewater Treatment and Recycling
Our on-site wastewater treatment facility processes all process water before discharge, meeting and exceeding Chinese national discharge standards:
- Multi-stage treatment including equalization, chemical precipitation, biological treatment (activated sludge), and advanced oxidation for persistent organic compounds
- Real-time online monitoring of COD, pH, and ammonia nitrogen with data transmitted to local environmental authorities
- Treated effluent recycling for non-process applications including cooling tower makeup and facility cleaning
- Currently achieving 40% water recycling rate, targeting 60% by 2028
🎯 Zero Liquid Discharge Goal
We have established a long-term roadmap toward zero liquid discharge (ZLD) at our Zibo facility. Key milestones include:
- Feasibility study completed (2024) — identified technology options including MVR evaporation and crystallization
- Pilot-scale ZLD unit for high-salinity waste streams — commissioning targeted for 2027
- Full ZLD implementation for all liquid waste streams — target 2032
- Recovered water will be reused in production, and recovered salts will be evaluated for beneficial reuse or safe disposal
Waste Management
Organic peroxide manufacturing generates specific waste streams that require careful management. We apply the waste hierarchy — reduce, reuse, recycle, recover, dispose — to minimize environmental impact.
⚠️ Hazardous Waste Handling
Our manufacturing processes generate hazardous waste streams including:
- Spent solvents and reaction residues — Managed in compliance with China's Hazardous Waste Management regulations. All hazardous waste is stored in designated, bunded areas with secondary containment and is transported by licensed hazardous waste carriers to approved treatment and disposal facilities.
- Contaminated packaging and PPE — Collected separately and sent to licensed hazardous waste incineration facilities with energy recovery.
- Laboratory waste — Small quantities of analytical waste are segregated by hazard class and managed through our hazardous waste contractor.
Waste Reduction Initiatives
We continuously work to reduce waste generation at source through yield optimization, process improvements, and quality control enhancements that minimize off-specification production. Our target is a 20% reduction in waste intensity (kg waste per ton product) by 2030.
Waste-to-Energy
Where reduction and recycling are not feasible, we direct combustible non-hazardous waste to authorized waste-to-energy facilities, recovering embedded energy value and avoiding landfill disposal. This aligns with China's circular economy promotion law.
Circular Economy Principles
We integrate circular economy thinking into our operations, identifying opportunities to close material loops and extend resource value throughout our production system.
Byproduct Recovery
Reaction byproducts from peroxide synthesis are evaluated for potential recovery and reuse. Where pure recovery is not technically feasible, byproduct streams are assessed for alternative applications, reducing virgin material consumption.
Solvent Recycling
Solvents used in purification and formulation steps are recovered through distillation and reused in subsequent production batches. Our solvent recovery system achieves a 92% recovery rate, significantly reducing both procurement costs and waste generation.
Packaging Reduction
We are redesigning product packaging to reduce material use while maintaining safety standards for organic peroxide transport. Initiatives include optimizing container sizing, specifying recyclable materials, and exploring returnable intermediate bulk containers (IBCs) for key customers.
Circular Product Design
We incorporate circular design principles into our product delivery systems, considering end-of-life aspects of packaging, developing concentrated formulations that reduce transport volume, and collaborating with customers on closed-loop delivery solutions.
Resource Efficiency Metrics
We track key resource efficiency indicators to measure our progress and drive continuous improvement in eco-efficiency performance.
| Metric | Unit | 2019 Baseline | Current (2025) | 2030 Target | Change |
|---|---|---|---|---|---|
| Energy Intensity | GJ / ton product | 12.5 | 10.8 | 8.8 | -30% |
| Water Intensity | m³ / ton product | 8.2 | 6.8 | 5.7 | -30% |
| Waste Intensity | kg / ton product | 95 | 82 | 76 | -20% |
| Raw Material Yield | % | 88% | 91% | 94% | +6 pp |
| Water Recycling Rate | % | 25% | 40% | 60% | +35 pp |
| Solvent Recovery Rate | % | 85% | 92% | 95% | +10 pp |
All targets are measured against the 2019 baseline year. Progress is reviewed quarterly and reported annually.
Solvent Recovery System
Our on-site solvent recovery system exemplifies our commitment to eco-efficiency and circularity, achieving a 92% recovery rate for process solvents.
Achieving 92% Solvent Recovery at Zibo
In 2022, Do Sender Chemicals invested in a state-of-the-art multi-stage distillation system for solvent recovery at the Zibo manufacturing facility. The system processes solvent-laden streams from our organic peroxide synthesis and purification operations, separating and purifying solvents for reuse in subsequent production batches.
The project included installation of three fractional distillation columns with automated process control, feed preheating using waste heat from other processes, and inline analytical monitoring to ensure recovered solvent quality meets production specifications.