Usefull By-product

Waste like sand and slag can be utilized like for road filling.
Application of black liquor (from sulphate pulping) as fertilizer.
Application of screening rejects in board manufacture
Preparation of utensils cleaning powder from waste liquor of kier (textile) and ash from coal fired boiler. (Textile)
Use of cloth rags for mattress making. (Textile)
Use of cashwnut shall oil as coating for corrosion prevention.
Make agreement with suppliers to return packing boxes.