Peanut preparation: shelling, grading, roasting, and aflatoxin control

Why prep dominates

Why shelling and roasting decide the press outcome before tonnage

Peanut press performance is set upstream. Kernel oil 44-56% only converts to yield 40-48% when shell residue <2%, moisture 5-8%, roast 160-180°C × 20-30 min, and damaged/moldy kernels rejected. Without these, even a 500-ton press underperforms.

• Shell residue <2% (otherwise barrel partitions clog, pressure drops, residual cake oil rises >10%).
• Moisture 5-8% (>10% prevents cake formation; <4% gives brittle cake and oil bypass channels).
• Roast color L* 50-60 (hot route) — too light = under-developed cell rupture, too dark = scorched flavor and PAH risk.

Module specifications

Pretreatment modules with capacity ranges

Inquiry inputs

Preparation data that closes the quote loop

• Pods or kernels? If pods, shell content (30-40%) and shelling capacity needed (kg/h).
• Kernel grade: 1000-kernel weight, broken-kernel %, moisture %, foreign matter %.
• Aflatoxin status: lab certificate per lot, UV sorter present? Storage RH <70%?
• Roasting: drum (continuous) or wok (batch)? Target temperature (160-180°C) and time (20-30 min)?
• Cake target: feed grade, food-grade peanut flour (defatting + grinding), or local resale?

Project boundary

What to confirm before scoping Peanut Shelling and Roasting | Shell <2%, Moisture 5-8%, Roast 160-180°C

Peanut Shelling and Roasting | Shell <2%, Moisture 5-8%, Roast 160-180°C should not be quoted from an equipment name alone. Check feed lots, target oil, post-press handling, and packing rhythm in one scope before deciding which Peanut Oil Press modules stay. Listed on the factory hot-press page — discuss 300/325 first.

When feed condition, moisture, impurities, batch weight, and product position are unclear, press tonnage and filter area become guesswork. Factory systems share 60 MPa and 2.2 kW motors; hot pure press is 30–40 min/barrel and cold pure press is ~2 h/barrel — cycle time matters more than brochure tonnage.

• Confirm whether feed is whole seed, kernels, pretreated material, or an existing semi-finished stream.
• Confirm whether the target is crude oil, filtered oil, bottled oil, drum ingredient oil, or a refining handoff.
• Hot cycle reference: pure press 30-40 min/barrel, ~1.5 h for 2 barrels with loading; cold pure press ~2 h/barrel, ~4.5 h for 2 barrels.
• Confirm batch rhythm, labor, changeover, retained samples, power (often 380V/50Hz/3ph), and site install conditions.

Factory model check

Match hot / cold models to factory hard data

Pin models to published factory specs before tonnage talk.

Hot 300/325: 300–325 ton, 60 MPa system, standard barrel Ø390×800 mm / max 100 kg, pure press 30–40 min/barrel, ~1.5 h for 2 barrels with loading, 2.2 kW motor. Cold 355/400/426/480/500: 370–630 ton, integrated frame, same 100 kg standard barrel, pure press ~2 h/barrel, ~4.5 h for 2 barrels with loading; optional Ø300 high-pressure barrel max 60 kg. Residual oil target ~≤5% (peanut hot often 6–8% measured).

• Standard barrel Ø390×800 mm, max ~100 kg crushed feed; optional Ø300 high-pressure barrel max ~60 kg.
• Cylinder material 27SiMn; cold frames are integrated molded steel; hot frames are typically H-type channel steel.
• Listed on the factory hot-press page — discuss 300/325 first.

Equipment check

project scope needs to land in equipment interfaces

Once the route is clear, write the interfaces: how preparation feeds the press, how oil leaves the press, how filtration connects to tanks, and how packing receives finished oil.