The short version.

• TNPL (Tamil Nadu Newsprint and Papers Limited) — commissioned 1984, a Tamil Nadu government-promoted but market-listed company, roughly 35% state-held — runs on bagasse (crushed sugarcane fibre) as its primary furnish, alongside wood pulp and recycled wastepaper. As of 31 March 2025 its Karur pulping lines totalled 1,580 tonnes/day — 550 tpd bagasse pulping, 730 tpd hardwood, 300 tpd deinked wastepaper — feeding roughly 400,000 tonnes a year of paper and paperboard capacity.
• The pitch for bagasse is simple: it's a sugar-mill byproduct, not a felled tree. The chemistry to actually use it is harder than wood: bagasse needs its soft, useless pith removed before pulping (older depithing methods strip only about half of it; an improved process from the Central Pulp & Paper Research Institute, CPPRI, claims over 75%), and its ash carries more silica than wood does, which fouls the chemical-recovery boiler a soda-pulping mill depends on to stay economical at scale.
• Bagasse isn't uncontested. India's roughly 527 sugar mills already burn the great majority of their bagasse for captive cogeneration power; the Ministry of New & Renewable Energy's own July 2026 capacity table puts India's combined bagasse-and-biomass cogeneration total at roughly 11,748 MW, concentrated in Maharashtra, Uttar Pradesh and Karnataka. How much of India's total bagasse output actually reaches paper mills, as against power or other uses, could not be pinned to one reliable national figure for this piece — sources found range from roughly 5 million to 24 million tonnes a year, an inconsistency reported here rather than resolved.
• TNPL is closer to the exception than the rule. A nearby Tamil Nadu peer, Seshasayee Paper & Boards, sources only about 10% of its pulp from bagasse and markets itself as "Wood Positive"; Century Pulp and Paper sells a bagasse-based "Century Green Pulp" line without disclosing a tonnage. No other Indian paper company's published figures found for this piece come close to TNPL's scale of bagasse dependence.
• The premise worth checking directly, rather than assuming: does India's paper-industry association, the Indian Paper Manufacturers Association (IPMA), actually campaign for more bagasse capacity as the industry's growth opportunity? On the public record checked for this piece, no. IPMA's own recent advocacy centres on securing degraded-land allocation for pulpwood/agroforestry plantations and opposing a customs-duty increase on imported wastepaper — not a bagasse-specific ask. IPMA's own published furnish-mix figure for the industry (roughly 18-20% wood, 74-76% recycled fibre, 6-8% agro-residue including bagasse) shows agro-residue is already the smallest of the industry's three fibre sources nationally, not a rising priority.

What TNPL actually is

Tamil Nadu Newsprint and Papers Limited was set up in 1979 and began commercial production in 1984 with an initial capacity of 90,000 tonnes a year — a Tamil Nadu government-promoted company, built to convert Tamil Nadu's sugar-belt bagasse into paper rather than importing pulpwood or newsprint. It has stayed listed and state-linked rather than fully state-owned: as of current shareholding data, the Tamil Nadu government holds roughly 35% of the company, with the rest split between domestic and foreign institutional investors and the public. Its Unit-I complex at Karur now runs three paper machines totalling around 400,000 tonnes a year of paper and paperboard capacity, and as of 31 March 2025 its pulping lines totalled 1,580 tonnes a day across three furnish streams: 550 tonnes/day of chemical bagasse pulping, 730 tonnes/day of hardwood pulping, and 300 tonnes/day of deinked (recycled) wastepaper pulp. TNPL's own materials describe it as a maker of "bagasse based eco-friendly Paper and Paperboard," and the company has diversified beyond paper into a tissue-paper line (a new 100-tonne-a-day unit targeted for commissioning by March 2026) and a cement business built on the same site's byproduct streams. Its financials show a business exposed to real input-cost swings: FY2025 revenue of roughly ₹45.9 billion came with net income collapsing to about ₹37.3 million on higher costs, before recovering to ₹46.4 billion revenue and ₹2.48 billion net income in FY2026.

TNPL's 1979 founding, 1984 commercial start, and 90,000-tonne initial capacity are corroborated by Wikipedia's TNPL article. Its roughly 35% Tamil Nadu government shareholding is from Trendlyne's current shareholding-pattern data. Karur's ~400,000-tonne paper/paperboard capacity and the 1,580 tonnes/day pulping breakdown (bagasse/hardwood/deinking) as of 31 March 2025 are from a CARE Ratings credit-rating press release on the company, a source with a direct financial interest in accurate figures. The tissue-line and cement-business details are from Pulp and Paper Times' industry coverage. FY2025/FY2026 revenue and net-income figures are from StockAnalysis.com's financial-statement aggregation. TNPL's own self-description as a bagasse-based paper maker is from the company's own site (tnpl.com); this piece could not find a rigorous third-party (e.g. CPPRI) ranking independently confirming TNPL as the world's or India's largest bagasse-based paper mill specifically, a claim repeated across secondary sources but not independently audited in anything found here, so it is not asserted as a verified superlative.

How sugarcane waste actually becomes paper

Bagasse is what's left of a sugarcane stalk after a mill crushes out the juice: a fibrous, low-density residue that is mostly cellulose and lignin, chemically not so different from wood pulp's own raw material, but bundled with a soft, pithy tissue that has no fibre value and actively interferes with papermaking if it isn't removed first. Depithing — mechanically separating that useless pith from the usable fibre — is the first real processing step, and it's an imperfect one: conventional depithing equipment removes only around half the pith in a single pass, leaving mills to either accept a lower-quality pulp or run material through more than once. CPPRI, India's dedicated pulp-and-paper research institute, has developed an improved depithing process it says lifts removal efficiency above 75%, cutting residual pith to 5-7% — a real, published engineering improvement on the older baseline, not a marketing claim.

Depithed bagasse fibre then goes through the same broad chemical (soda) pulping process a wood-based mill uses, but with one persistent complication wood doesn't carry to the same degree: bagasse's ash content includes meaningfully more silica than wood does, along with other non-process elements like potassium and chlorides. In a chemical pulping mill, spent cooking liquor is normally burned in a recovery boiler to reclaim the pulping chemicals and generate process energy — the economic backbone of large-scale kraft or soda pulping. Silica-rich black liquor from bagasse fouls that recovery system, which is exactly why CPPRI has run dedicated silica-removal research rather than treating it as a solved problem. None of this makes bagasse pulping impractical — TNPL has run it profitably since 1984 — but it explains why bagasse-based papermaking has stayed a specialist capability concentrated in a handful of mills rather than a routine substitute any paper company can drop into an existing wood-pulping line.

The depithing-efficiency figures (conventional methods removing roughly half of pith, CPPRI's improved process exceeding 75% removal with 5-7% residual pith) are from a CPPRI-authored paper indexed on ResearchGate. The silica/non-process-element complication for chemical recovery in agro-residue pulping is corroborated by CPPRI-linked research summaries found for this piece describing dedicated silica-removal work; this piece did not read a specific CPPRI technical report on recovery-boiler fouling rates directly, so the mechanism is reported as established but the severity is not quantified with a specific figure.

Bagasse has other claimants, and paper is not the biggest one

This blog has already covered how contested sugarcane's other output — cane juice and molasses — has become between sugar, ethanol and now bioplastic feedstock (see Sugarcane's Third Claimant). Bagasse runs a parallel but distinct version of the same story, and by scale, paper is not where most of it goes. India's roughly 527 sugar mills mostly burn their own bagasse on-site for captive cogeneration — producing steam and power to run the mill itself, with any surplus exported to the grid. This blog's own reporting on biomass power (Biomass Power Is Dispatchable at Night, and India Still Isn't Building It) found the Ministry of New & Renewable Energy's own state-wise capacity table, dated 31 July 2026, putting India's combined bio-power capacity — bagasse cogeneration, non-bagasse biomass cogeneration and waste-to-energy together — at 11,747.57 MW, nearly all of it concentrated in Maharashtra, Uttar Pradesh and Karnataka and running "almost entirely through sugarcane-bagasse cogeneration attached to existing sugar mills." That figure isn't bagasse-cogeneration-alone, but the same reporting found it heavily bagasse-dominated by source.

Putting a precise number on paper's specific share of India's bagasse output turns out to be harder than it should be. Figures found for this piece range widely and don't reconcile: one source puts India's total wet bagasse generation at roughly 80 million tonnes a year (at around 50% moisture, from roughly 240 million tonnes of cane crushed by ~527 mills); others separately describe "50-60 lakh tonnes" (5-6 million tonnes) going to the paper industry specifically, or "24 million tonnes annually" feeding "20-plus" bagasse paper mills nationally — numbers that don't fit together into one consistent national picture, whichever pair is compared. Rather than pick the figure that best fits a tidy narrative, this piece reports that the sourcing available doesn't support a precise, defensible "X% of India's bagasse goes to paper" claim, and treats the qualitative conclusion — cogeneration is clearly the larger, more capital-intensive claimant on bagasse; paper is a real but minority use — as the reliable part of the picture.

The ~527-sugar-mill and ~80-million-tonne wet-bagasse figures are from Waste Management World's coverage of Indian sugar-mill cogeneration. The MNRE bio-power capacity figure (11,747.57 MW as of 31 July 2026) and its concentration in Maharashtra/UP/Karnataka via bagasse cogeneration are drawn directly from this blog's own prior verified reporting, sourced to MNRE's own published state-wise capacity table. The conflicting 5-6 million and 24 million tonne paper-industry bagasse-consumption figures, and the "20-plus bagasse paper mills" count, are from separate secondary industry sources that this piece could not reconcile against each other or against the 80-million-tonne total-generation figure; a more authoritative national split (for instance from the Indian Sugar Mills Association, ISMA, which this piece did not query directly) would be needed to state a reliable percentage, and none is offered here.

TNPL is closer to the exception than the rule

Even within India's paper industry, heavy bagasse dependence at TNPL's scale is unusual rather than typical. Seshasayee Paper and Boards, a mill in Erode, Tamil Nadu — close enough to draw on the same sugar belt TNPL does — sources only around 10% of its pulp from bagasse, via an associate sugar company, and explicitly brands itself a "Wood Positive" company: its expansion programme (capacity raised from 132,000 to 165,000 tonnes a year under one project phase, with a further phase planned) is built around wood and only a modest bagasse contribution, not the other way around. Century Pulp and Paper markets a bagasse-derived "Century Green Pulp" line it says it has used in premium grades "for decades," but no specific tonnage or share of its furnish was found in the sources checked for this piece. No other Indian paper company's disclosed figures found here approach TNPL's proportion of bagasse in total furnish. That matters for how the TNPL story should be read: it demonstrates that bagasse-based papermaking works at real industrial scale in India, not that most of the industry is quietly following the same model.

Seshasayee's ~10% bagasse pulp share, its "Wood Positive" branding, and its 132,000-to-165,000-tonne capacity expansion are from Papermart's profile of the company. Century Pulp and Paper's "Century Green Pulp" bagasse line is from the company's own marketing materials as reported in trade coverage; no specific tonnage figure for it was found and none is stated here. A separately-checked company, Rama Newsprint (Shree Rama Newsprint Ltd, Surat, 150,000 tonnes installed capacity), is described in the sources checked as primarily recycled-paper-based rather than bagasse-based, and was excluded from this comparison as a poor fit for the claim it might otherwise be cited to support.

What the industry's own trade body is actually asking for

The natural next question is what India's paper-industry association, the Indian Paper Manufacturers Association (IPMA), says about this opportunity — and the honest answer, checked directly against IPMA's own published material and recent press coverage, is that its public advocacy doesn't centre on bagasse at all. IPMA's own overview page states the industry's national furnish mix at roughly 18-20% wood, 74-76% recycled fibre, and 6-8% agro-residue (a category that includes bagasse alongside wheat straw and other crop residues) — agro-residue is already the smallest of the industry's three fibre streams by a wide margin, not an area IPMA's own figures frame as growing. IPMA's actual recent policy asks, as reported in the press, point elsewhere: IPMA President Pawan Agarwal (also MD of Naini Papers) has publicly pushed for government allocation of degraded land for pulpwood plantation and agroforestry, arguing domestic wood availability of roughly 9 million tonnes a year already falls short of demand of around 11 million tonnes a year, a gap projected to widen toward 15 million tonnes; separately, IPMA has flagged a customs-duty increase on imported recovered (waste) paper, from 0% to 2.5%, as a threat to raw-material security on the recycled-fibre side. Nothing found in IPMA's own materials or recent press coverage frames bagasse or agro-residue capacity expansion as a comparable priority ask. That's a real, checkable gap between TNPL's own working example and its industry association's public lobbying agenda, not an assumption this piece is making about the association's intent.

IPMA's published furnish-mix figure (~18-20% wood, ~74-76% recycled fibre, ~6-8% agro-residue) is from IPMA's own website (ipmaindia.org/overview-2). President Pawan Agarwal's degraded-land/agroforestry advocacy and the 9-million-vs-11-to-15-million-tonne wood-supply-gap figures are from Business Standard's coverage of IPMA's public statements. The wastepaper customs-duty concern is from industry commentary encountered alongside the same coverage. This piece searched specifically for a recent (last one to two years) IPMA statement, press release, or office-bearer quote championing bagasse or agro-residue capacity as a growth opportunity and found none; that absence is reported as a finding of this piece's research, not proof no such statement exists anywhere — a more exhaustive search of IPMA's own press archive, which this piece did not access directly, could in principle turn one up.

What doesn't follow from any of this

None of this should be read as bagasse-based papermaking being a failed or fringe idea — TNPL has run it profitably at real industrial scale for four decades, and the underlying case (a sugar-mill byproduct substituting for a felled tree) is sound as far as it goes. What doesn't follow is the assumption, easy to make from TNPL's example alone, that this is where India's paper industry as a whole is headed, or that its trade association is actively pushing the rest of the sector in that direction. IPMA's own furnish-mix numbers show agro-residue is a small and, on the evidence checked here, not obviously growing share of national fibre supply; its public advocacy is aimed at wood and recycled-fibre supply security, not bagasse capacity. Nor should readers take this piece's inability to pin down a precise national bagasse-to-paper allocation figure as license to assume any specific percentage — the honest state of the evidence is that cogeneration is clearly the larger claimant and paper a real but minority one, without a single number this piece can stand behind for exactly how the rest divides. TNPL, Seshasayee and Century Pulp between them show a spectrum from heavy to marginal bagasse dependence within the same industry; treating any one of them as representative of "how Indian paper is made" would overstate the case in either direction.

Sources and caveats