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Rivanta Green Industrial Infrastructure
Engineering Architecture

Integrated systems engineering and manufacturing flowsheet.

Our manufacturing architecture integrates thermal conversion, precision Green Silicon For Chips refining (9N purity), anaerobic digestion, and waste-heat recovery into an interconnected, energy-efficient industrial ecosystem.

INTEGRATED FLOWSHEET — FLUIDIZED BED ISOTHERMAL CALCINATION — HIGH RECOVERY MEMBRANE SEPARATION — WASTE HEAT STEAM RECOVERY (HRSG) — ZERO LIQUID DISCHARGE (ZLD) — ✦
Process Architecture

Step-by-step conversion from raw husk to Green Silicon For Chips (9N).

Every unit operation in our flagship extraction facility is calibrated for strict batch-to-batch repeatability, high recovery efficiency, and complete amorphous phase integrity without secondary environmental burdens.

01

Feedstock Logistics, Sizing & De-Stoning

Mechanical Pre-Conditioning

Raw biomass residues undergo vibratory screening, multi-stage magnetic separation of ferrous tramp metal, air classification for dust elimination, and gravity destoning to safeguard downstream reaction loops.

Controls:Automated moisture sensors, loss-in-weight feeders, negative-pressure dust filtration
02

Controlled Atmosphere Isothermal Calcination

Fluidized Bed / Calciner

Biomass is thermally decomposed under calibrated temperature thresholds (strictly below 700°C) and controlled oxygen stoichiometry, guaranteeing complete carbon burnout while avoiding quartz or cristobalite crystallization.

Controls:Multi-point thermocouple arrays, continuous flue-gas O2/CO analyzers, PLC damper actuators
03

Thermo-Chemical Digestion & Precursor Refining

Reaction Crystallization

Ash is digested with mild alkaline liquor to extract high-purity silicon precursors, followed by advanced hydrometallurgical reduction and multi-stage zone refining to synthesize Green Silicon For Chips with 9N purity (99.9999999%).

Controls:High-precision digital pH loop controllers, automated reagent metering, variable agitator speeds
04

Neutral Washing, Dewatering & Ultra-Pure Drying

Separation & Moisture Elimination

Refined silicon precursor slurry is filtered through automated membrane filter presses with ultra-pure deionized counter-current washing, then atomized in flash drying systems with <0.1% residual moisture.

Controls:In-line conductivity filtrate monitoring, inlet/outlet thermal safety interlocks
05

Electronic-Grade Induction & 9N Classification

Advanced Refining & Sealed Handling

Purified green silicon is processed under inert argon atmospheres into semiconductor-grade polycrystalline and epitaxial feedstock, achieving 9N purity (99.9999999%) calibrated for chip foundries and solar wafer manufacturing.

Controls:In-line mass spectrometry, laser diffraction particle sizers, Class 10 cleanroom packaging
Thermal Integration01.

Waste Heat Recovery (HRSG)

Flue gases from biomass calcination pass through heat recovery steam generators (HRSG), generating 100% of process steam required for chemical digestion and spray drying stages.

High Thermodynamic Efficiency
Water Conservation02.

Zero Liquid Discharge (ZLD)

Process wash effluents are treated through high-recovery reverse osmosis and mechanical vapor recompression (MVR) evaporators, recycling 98%+ of clean water back into the extraction cycle.

98%+ Closed-Loop Recycled Water
Renewable Cogeneration03.

Integrated Biogas Island

Non-combustible organic residues and wastewater concentrates feed high-rate anaerobic digesters, producing purified biomethane to power plant compressors and logistics transport.

Internal Renewable Energy Loop