Strategic Masterplan for the Jute Sector Revival: Volume III – Industrial Transformation of the Bast Fiber Complex: Jute Mill Automation, Legacy Retrofitting, Cyber-Physical Architecture, and Capital Structuring

This third volume of the Strategic Masterplan for the Jute Sector Revival turns from markets and finance to the factory floor. It traces the jute mill's hundred-year mechanical lineage, from the Belfast-designed Mackie line institutionalised in Bengal through Lagan Engineering, through post-colonial stagnation and labour casualisation, to the present shift toward mechatronic automation and waste-to-nanocellulose biorefining. It sets out the process engineering of a modern mill (card-mounted Drawheads, intersecting pin-type drawing, ring, compact and centrifugal spinning, auto-doffing and shuttleless weaving) and the brownfield retrofits that convert legacy cast-iron frames, including the flyer-to-ring conversion trialled in Bangladesh and the winding and weaving retrofits that cut a Bangladeshi mill's electricity use by about 11%. The volume then describes a two-layer cyber-physical architecture, with sensor-led process control on the textile line and a chemo-mechanical biorefinery turning caddis and thread waste into cellulose nanocrystals and jute-epoxy composites, and the workforce competencies it requires. It ends with three capital archetypes for a 30 tonne-per-day complex (brownfield retrofit, greenfield automated mill and integrated biorefinery), their capital stacks and modelled returns, and a 36-month roadmap. The financial models are scenario estimates. Where the arithmetic or the evidence did not hold, the text has been corrected or flagged, and these changes are listed in Section 8.