Film-Forming Industry

1. Industry Overview

DMAC is widely used in industries such as polyimide film production, reverse osmosis membrane manufacturing, and synthetic fiber spinning. The waste gases and wastewater generated by its use have become a key focus of pollution control in the membrane manufacturing industry.

Pollutant Category	Primary source	Major pollutants	Key features
Exhaust gas	Preparation of the film-forming solution, coating, and drying	Organic废气/VOCs	Worth recycling
Wastewater	Phase-inversion coagulation bath, waste liquid distillation system, equipment cleaning	DMAC-containing wastewater (waste liquid)	High COD, high ammonia nitrogen, poor biodegradability
Solid Waste	Three-waste treatment, production process	Biochemical sludge, waste membranes, and waste packaging materials	Most are hazardous wastes and require professional disposal.

2. Solution

Julian Group specializes in circular solutions for DMAC exhaust gases and wastewater, providing owners with efficient, stable, and mature technological solutions that support green production in industries such as PI film.

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

● Process exhaust gases: DMAC flue gas recovery and treatment equipment (spray absorption tower) or RTO incineration.

● Wastewater (waste liquid) containing DMAC: Multi-effect distillation purification unit

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

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

(2) JULIAN Environmental Protection provides chemical solvent raw materials, as well as resource utilization and harmless disposal services for solid waste (hazardous waste):

● Recovery and reuse of waste organic solvents, as well as the regenerated solvent DMAC from finished products;

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

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

Product link

● Spray Absorption Tower (DMAC Flue Gas Recovery and Treatment Equipment)
● RTO incineration unit
● STO incineration unit
● Bag-type dust collector
● Waste Liquid Distillation and Purification System
● Industrial wastewater treatment