solutions

Project Case: VOCs Pretreatment for Aramid Fiber Production at Bluestar New Materials, Chengdu, China Industry: Specialty Chemicals (Aramid Fiber Manufacturing) Application: VOCs Control - Fixed Adsorption Pretreatment Sorbent Used: Honeycomb Activated Carbon Product Grade: Coal-based, iodine value 800 mg/g Treatment Medium: Organic vapor from resin and solvent-based processes Installation Type: Fixed-bed adsorption modules Commissioned: Q4 2024 Background Bluestar New Materials Co., Ltd., a subsidiary of China National Bluestar (Group) Co., Ltd., operates a large-scale aramid fiber production facility in Chengdu, Sichuan Province. Aramid fibers, widely used in aerospace, defense, and high-performance industrial applications, require precision synthesis involving resin systems, high-temperature curing, and solvent processing steps. These operations inevitably generate volatile organic compounds (VOCs), including aromatic hydrocarbons, ketones, and amines, which must be controlled in compliance with China's national emission standards (GB 31572-2015 and GB 16297-1996). To ensure environmental compliance and workplace safety, Bluestar integrated a fixed adsorption pretreatment system using honeycomb activated carbon for VOC capture prior to downstream catalytic oxidation. Technical Solution The selected solution employed coal-based honeycomb activated carbon blocks with the following key specifications: Iodine Value: 800 mg/g Apparent Density: 0.35-0.45 g/cm³ Cell Geometry: 100*100 cells per square inch Dimensions: 100*100*100 mm Moisture Content:

Location: Central Java, Indonesia Industry: Power Plant & Seawater Desalination Application: RO pretreatment wastewater polishing Product Used: Coconut shell-based granular activated carbon (iodine value ≥1000 mg/g) Project Start: August 2024 Project Overview The project involves the treatment of high-strength wastewater generated from the backwash cycle of a seawater reverse osmosis (SWRO) pretreatment system at a coastal coal-fired power plant. The water contains elevated levels of suspended solids and organics, including humic substances and low-molecular-weight acids. Granular activated carbon (GAC) filtration was integrated downstream of physical clarification to further reduce organic loading and improve SDI stability. Water Quality Parameters TSS (Total Suspended Solids): 155 mg/L (peak design) TOC (Total Organic Carbon): up to 5 mg/L Filtrate TOC: ≤0.75 mg/L Organic removal (UV254 method): ≥85% SDI (Silt Density Index): consistently ≤3, meeting SWRO feedwater specs (SDI

Location: Wuhan, China Industry: Municipal Solid Waste Incineration Application: Odor and VOC removal in emergency deodorization system Product Used: Coal-based pelletized activated carbon (iodine value ~850 mg/g) Project Start: March 2024 Project Overview In response to a sudden increase in odor emissions during the expansion phase of the Qianzishan WtE plant, a rapid-response deodorization system was deployed. The system integrates plant-derived liquid spray scrubbing with a fixed-bed activated carbon adsorption module. The target pollutants include hydrogen sulfide (H₂S), ammonia (NH₃), and a broad spectrum of sulfur- and nitrogen-containing VOCs. Technical Parameters Airflow rate: 50,000 m³/h Pollutant concentration: H₂S: 10-50 mg/m³ NH₃/VOCs: