Pulp & Paper (pulp and paper)

The pulp and paper industry converts wood, bamboo, agricultural residue or recycled fibre into pulp and then paper. It is one of the most water- and pollution-intensive industries, which is why CPCB sets specific wastewater generation benchmarks for it: around 175 m³ per tonne for large integrated paper mills, with related cellulose-fibre processes at 150 m³ per tonne (viscose staple fibre) and up to 500 m³ per tonne (viscose filament yarn); small mills range 50-150 m³ per tonne depending on feedstock.

Paper-mill effluent is characteristically high in BOD, COD, suspended solids, colour and (in pulping) lignin-derived and chlorinated organics from bleaching. The industry is therefore a textbook case of why both quality (discharge standards) and quantity (generation standards) are regulated together, and of why water recycling and tertiary treatment matter.

For recyclers, the pulp and paper industry is directly relevant in two ways. First, paper and cardboard recycling feeds recycled fibre back into paper mills — waste paper recyclers are suppliers to this industry, and the recycled-fibre route uses far less water and energy than virgin pulping, which is a core circular-economy argument. Second, the industry is a benchmark and customer reference for anyone in fibre, biomass or organic-waste recycling.

The practical relevance for the recycling reader is mainly contextual: pulp and paper illustrates the water-intensity benchmarks the wastewater generation standards target, and recycled paper is one of the oldest and largest recycling streams in India. A recycler dealing in waste paper supplies fibre to these mills; one in biomass or agro-residue may compete for or supply the same feedstocks the industry uses. Understanding the industry's water and pollution profile helps a recycler position recycled fibre as the lower-impact alternative to virgin pulp.