Overview
Tea seed cake is a residual byproduct obtained after pressing Camellia seeds (e.g., Camellia oleifera) for tea oil extraction. Rich in saponins (natural surfactants) and organic nutrients, it has been utilized for centuries in East Asia for its multifunctional properties. In modern B2B trade, it is valued as a cost-effective, eco-friendly alternative to synthetic pesticides and fertilizers, particularly in organic farming and sustainable aquaculture. Its low environmental impact and biodegradability make it a preferred choice for green agriculture initiatives.
Physical and Chemical Properties
The cake typically contains 10–15% saponins, which exhibit strong emulsifying and pesticidal effects. Residual oil (5–8%) and fibrous matter contribute to its soil-conditioning properties. Its alkaline pH (8–9) helps neutralize acidic soils, while saponins act as natural molluscicides and piscicides in water bodies. The material decomposes slowly, releasing nitrogen and potassium, which aids long-term soil fertility.
Main Applications
In agriculture, tea seed cake is powdered and applied as a biopesticide against nematodes, snails, and soil-borne pathogens. It also serves as a slow-release fertilizer, improving soil structure. Aquaculture farms use it to clear ponds of unwanted fish and parasites before stocking. Traditional medicine employs extracts for anti-inflammatory treatments, though this application requires further clinical validation.
Safety and Storage
While generally safe, direct contact with concentrated saponins may cause mild skin irritation. Proper PPE (gloves, masks) is recommended during handling. Storage requires protection from humidity to prevent mold growth. Bulk purchases should be kept in breathable sacks in ventilated areas, with a shelf life of 12–18 months under optimal conditions.
B2B Procurement Guide
Bulk buyers should verify the cake's saponin content (typically 12% for premium grades) through lab certificates. Moisture content below 10% ensures stability during transit. Suppliers often offer discounts for 30+ kg orders, with prices varying by region and season. Partner with producers who adhere to cold-pressing methods, as high-heat processing degrades active compounds.
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