Synthetic Leather Industry

1. Industry Overview

The synthetic leather industry generates large quantities of “three industrial wastes” during the production process. The volume and complexity of these pollutants are particularly prominent within the light industrial sector, with DMF being the most representative pollutant in the synthetic leather industry.

Pollutant Category	Primary source	Major pollutants	Key features
Wastewater	Wet-process production line, waste liquid distillation system, equipment cleaning	Wastewater (waste liquid) containing DMF/DMAC	High COD, high ammonia nitrogen, poor biodegradability, and contains the characteristic pollutant DMF.
Exhaust gas	Dry-process, wet-process, and post-processing production lines	Organic waste gas/VOCs	Worth recycling
Solid Waste	Waste gas treatment, wastewater treatment Leftover scraps, non-conforming products	Spent activated carbon, biochemical sludge, waste packaging materials, waste leather materials, etc.	Biochemical sludge, waste activated carbon, waste packaging materials, and the like are classified as hazardous waste and require professional disposal.

2. Solution

Julian Group has over 20 years of technical expertise and practical engineering experience in pollution control within the synthetic leather industry. Focusing on the coordinated integration of the entire process—“waste gas recovery, distillation and purification, and wastewater treatment”—we provide clients with efficient, stable, and proven technological solutions that enable high-efficiency resource recovery and compliance with emission standards for pollutants.

(1) Yingzhong Environmental Protection provides exhaust gas treatment and wastewater treatment equipment:

● Process exhaust gases from the dry-process production line: DMF/DMAC waste gas recovery unit (spray absorption tower);

● Process exhaust gases from the wet-process production line (drying section): industrial fume purification equipment;

● Process exhaust gases from the third-generation printing production line: Zeolite rotor + RTO incineration unit;

● Regeneration of waste activated carbon DMF/DMAC: Five-tower four-effect distillation unit, MVR + three-tower three-effect distillation unit;

● Wastewater from the top of the waste liquid distillation tower: high-COD and high-ammonia nitrogen wastewater treatment facility;

● Vacuum exhaust gas and dimethylamine exhaust gas from waste liquid distillation equipment: STO incineration + steam reuse + baghouse dust removal system.

(2) JULIAN Environmental Protection provides raw materials such as polyurethane resins and chemical solvents, as well as services for the resource utilization and harmless disposal of solid waste (hazardous waste):

● Develop customized functional polyurethane materials;

● Recycling and reusing waste organic solvents, as well as regenerated solvents such as DMF and DMAC;

● Regeneration of waste activated carbon, as well as high-quality activated carbon with various iodine values;

● Hazardous wastes such as biochemical sludge and waste packaging materials: harmless incineration;

● JULIAN Group has a professional fleet of hazardous goods transportation vehicles, enabling it to provide timely transfer services for clients.

Product link

● Spray Absorption Tower (DMF/DMAC Waste Gas Recovery Unit)
● Industrial fume purification device
● Zeolite Rotary Wheel + RTO Incineration System
● Waste Liquid Distillation and Purification System
● Industrial wastewater treatment
● STO incineration unit
● Bag-type dust collector