Cleaning
Seed cleaner
Clears pond mud, grit and husk so the roaster only sees clean seed.
Price on requestDarbhanga is where makhana begins. The ponds around the city feed what the country knows as Mithila makhana, which picked up a GI tag in 2022. ICAR's National Research Centre on Makhana is based here, and the district has been named under One District One Product for makhana. You'd struggle to find a spot closer to the source.
A makhana processing plant in Darbhanga lets you turn seed into finished, packed makhana a short distance from the pond it came out of. Blacknut Agrifood Machinery builds the machines for exactly that, from the first cleaning pass to the sealed pouch. Each one is made at our factory in Tepla, Ambala, and we plan dispatch to Bihar around your site, your power supply and your capacity.
Every line is planned around your target capacity, raw material, power supply and budget. You can choose semi-automatic or fully automatic options based on the machines required.
| Parameter | Value |
|---|---|
| Capacity | Confirm with quotation |
| Body material | Stainless steel, food-grade |
| Power | Confirm with quotation |
| Control system | Confirm with quotation |
| Automation | Semi-automatic and fully automatic options |
| Warranty | Confirm with quotation |
| Motors | Confirm with quotation |
Capacity, stainless-steel grade, power, controls, warranty and motor brands vary by the machine configuration. No unconfirmed figures are shown.
Think of the line as a relay: every machine takes the makhana one step further and hands it to the next. You can start with a single makhana processing machine, or put the whole chain in at once. For bigger volumes, a full makhana popping plant keeps roasting and popping in one steady flow. We build around your capacity and budget, for farmer groups, FPOs, women's SHGs, startups and exporters.
| Stage | Machine | What it does | Approx. investment |
|---|---|---|---|
| 1Cleaning | Seed cleaner | Clears pond mud, grit and husk so the roaster only sees clean seed. | Price on request |
| 2Roasting and popping | Makhana popping machine | Even controlled heat pops the seed fully. For larger volumes, a makhana popping plant keeps the flow continuous. | Price on request |
| 3Sorting | Makhana sorting machine | Separates the broken, dark and under-popped pieces from the good ones. | Price on request |
| 4Grading | Makhana grading machine | Sizes pop into Lava, Murra and Thumri so each grade can be priced on its own. | Price on request |
| 5Polishing | Polisher | Smooths the surface for a clean, bright finish. | Price on request |
| 6Roasting and flavouring | Makhana flavouring machine | Roasts again and applies peri peri, cheese, masala, salted or caramel evenly. | Price on request |
| 7Packing | Pouch filling and sealing machine | Retail pouches or bulk bags. Add nitrogen flushing when crispness has to last. | Price on request |
Cleaning
Clears pond mud, grit and husk so the roaster only sees clean seed.
Price on requestRoasting and popping
Even controlled heat pops the seed fully. For larger volumes, a makhana popping plant keeps the flow continuous.
Price on requestSorting
Separates the broken, dark and under-popped pieces from the good ones.
Price on requestGrading
Sizes pop into Lava, Murra and Thumri so each grade can be priced on its own.
Price on requestPolishing
Smooths the surface for a clean, bright finish.
Price on requestRoasting and flavouring
Roasts again and applies peri peri, cheese, masala, salted or caramel evenly.
Price on requestPacking
Retail pouches or bulk bags. Add nitrogen flushing when crispness has to last.
Price on requestAbout 8 to 10 lakh rupees for a small setup, 25 to 30 lakh rupees or more for a large automatic plant
More questions in mind? WhatsApp or call us.
Bihar grows roughly 85 to 90 percent of India's makhana, and Darbhanga, Madhubani, Purnea and Katihar together account for about four-fifths of what the state produces. Set up here and the seed is down the road: lower freight, fresher lots, and the chance to look at a batch before you pay for it.
You'll also have company in the neighbourhood. Darbhanga houses ICAR's National Research Centre on Makhana, and the National Makhana Board, launched in September 2025 with its headquarters in Purnea, is working on production, processing and marketing for the sector.
What you won't find is a ready-made shed and a machine dealer around the corner, so plan your shed, power and dispatch date well before you order.
Mithila makhana
Regional figures and programme details are based on the supplied brief and should be checked before promotional use.
Tell us your district and capacity and we'll suggest a line.
Chat on WhatsAppDon't buy bigger than your seed supply. Work out how much you can source in a season, then pick a capacity that keeps the line busy. Larger lines need more power and floor space, so settle the shed first. Machine details are on the popping machine, grading plant and roasting and flavouring machine pages.
| Scale | Capacity (kg/hour) | Power (kW) | Floor area (sq ft) | Machine size (L × W × H) |
|---|---|---|---|---|
| Small unit | Confirm with quotation | Confirm with quotation | Confirm with quotation | Confirm with quotation |
| Medium unit | Confirm with quotation | Confirm with quotation | Confirm with quotation | Confirm with quotation |
| Large unit | Confirm with quotation | Confirm with quotation | Confirm with quotation | Confirm with quotation |
Most of the margin in makhana is made after the seed leaves the pond. The hard black shell has to be roasted, cracked and popped first, and every step after that adds to what a buyer will pay.
Curious what processing could add to your margin?
Calculate My ROISmall setups with basic machines generally begin around 8 to 10 lakh rupees. A large, fully automatic plant can go to 25 to 30 lakh rupees or more. Capacity, automation and the machines in your line set the final figure. Try the ROI calculator for monthly profit and payback, or grab the free project report for a full cost breakdown.
Darbhanga sits where several schemes meet, which is good news if you do your homework. Rules change, so check before you fix a budget.
35% credit-linked subsidy on eligible project cost, up to ₹10 lakh per micro unit, with at least 10% from you and the rest as a bank loan. Darbhanga has been identified under One District One Product for makhana, which is the approach PMFME is built around. Confirm eligibility and application status on the official PMFME portal.
Makhana is a focus sector. The capital subsidy is credit-linked, with a bank term loan of at least 20% of the project cost. Confirm current rates and project limits with the Directorate of Horticulture.
Headquartered in Purnea, with a central scheme for makhana value addition, as described in the supplied brief.
These supports are tied to a term loan. Banks ask for a project report and machinery quotation, and we can provide both.
Find out how much support you could get.
Estimate My SubsidySend us these details and we'll sketch a layout.
WhatsApp UsNot Sure What You Need?
Speak to a Machine ExpertMachines are built at our factory in Tepla, Ambala. It's a long road, so we plan dispatch and the installation visit together. Delivery usually takes time after order confirmation. Our team helps with machine selection, layout, installation and operator training, and spares and service stay available afterwards.
Layout and machine list finalised
Timing on requestAt our Tepla, Ambala factory
Timing on requestDispatch to your site
Timing on requestOur team at your unit
Timing on requestRun, clean and maintain the machines
Timing on requestroughly [X to Y weeks] from order to your first batch.
Your first sale also depends on seed supply, FSSAI and GST registration, and your buyers. We'll help you plan these before the machines arrive.
See popping, sorting and flavouring in motion before you commit. See how a Blacknut machine runs before you decide.
Real Bihar installation details and customer feedback are shared once the customer has approved publication. Ask our team for available case studies and project references.
View Case StudiesYes. Plenty of units start with a makhana popping machine and add sorting, grading and flavouring as sales grow. We'll tell you what to add first so your money isn't tied up in the wrong place.
Yes. Sorting removes the broken and bad pieces. Grading splits the good ones into size classes. Retail and export units usually need both.
A small setup generally starts at around 8 to 10 lakh rupees, and a large automatic plant can reach 25 to 30 lakh rupees or more, depending on capacity, automation and the machines you choose.
They're built at Tepla, Ambala and delivered to your unit. Our team installs them and trains your operators to run, clean and maintain each one.
Darbhanga has been identified under One District One Product for makhana, so a makhana unit fits the approach PMFME is built around. Subject to eligibility and the scheme's current status, the credit-linked subsidy is 35% of eligible project cost, up to ₹10 lakh for micro units, with at least 10% from you and the rest as a bank loan. Bihar's Agri Investment Promotion Policy is another route to check. We can supply the quotation and project report that banks ask for.
No rule says so, but it usually makes sense. Seed is grown all around Darbhanga, so local mandis, traders and FPOs are the natural source. Plan season stock and storage before you start.
Blacknut machines are built at our own factory in Tepla, Ambala, and every plant is made around the buyer's capacity and budget.
Available certificate images are shown below. Registration details can be confirmed with our team.






Visit our exhibition and field-event pages to see Blacknut's work with food processors.
Share your target capacity and location in Darbhanga. Our team can help you plan the next step.