Overview
Chlorella Vulgaris Paste is a concentrated biomass of the freshwater-turned-marine microalgae Chlorella vulgaris, cultivated in seawater environments. It is prized for its rapid growth rate and dense nutrient profile, including proteins, vitamins (B12, C), and antioxidants like lutein. The paste form retains moisture and bioactive compounds, making it a versatile raw material for industries ranging from agriculture to biotechnology. Unlike powdered chlorella, the paste avoids high-temperature drying, preserving heat-sensitive nutrients. Its marine origin distinguishes it from freshwater strains, offering unique mineral profiles (e.g., iodine, magnesium) beneficial for aquaculture and human health applications.
Physical and Chemical Properties
The paste exhibits a thick, homogeneous consistency with a characteristic dark green hue due to high chlorophyll-a and -b content. Its pH typically ranges from 6.5 to 7.5, and it contains 15–25% dry matter by weight. Key components include 40–60% protein (with all essential amino acids), 10–20% lipids (rich in EPA and DHA omega-3s), and 5–10% carbohydrates. Stability is a critical factor; the paste is prone to oxidation and microbial spoilage if not refrigerated. Its water activity (Aw) of 0.85–0.90 necessitates preservatives or cold storage. Heavy metal content (e.g., arsenic, lead) must comply with international standards for food or feed use, requiring rigorous batch testing.
Main Applications
In aquaculture, Chlorella paste serves as a live feed for larval shrimp, fish fry, and bivalves, enhancing survival rates and pigmentation. Its immunostimulatory properties reduce reliance on antibiotics. For human consumption, it is incorporated into functional foods, smoothies, and supplements for detoxification and immune support. Industrial uses include biofertilizers, where its nitrogen-fixing ability improves soil health, and cosmetics, where antioxidants combat skin aging. Emerging applications span biofuel research and wastewater treatment due to its pollutant-absorption capacity. The paste’s versatility drives demand in circular economy models.
Safety and Storage
While non-toxic, the paste requires strict hygiene protocols to prevent bacterial growth. Suppliers often add natural preservatives (e.g., citric acid) to extend shelf life to 3–6 months under refrigeration (4–10°C). Freezing is possible but may alter texture. Handlers should use gloves to avoid staining and check for allergen labeling (rare cases of chlorella allergies exist). Bulk storage tanks must be food-grade stainless steel to prevent contamination. Certifications like ISO 22000 or organic labels (e.g., EU Organic) indicate compliance with safety standards.
B2B Procurement Guide
Buyers should prioritize suppliers with transparent cultivation methods (open ponds vs. photobioreactors), as these affect purity and scalability. Key purchase criteria include: strain authenticity (DNA testing reports), heavy metal certificates, and cold-chain logistics guarantees. Pricing tiers depend on volume, with discounts for contracts exceeding 1 metric ton. Samples should be tested for microbial counts (<10,000 CFU/g) and nutrient consistency. Southeast Asian and European producers dominate the market, offering competitive pricing ($50–$80/kg for bulk) and GMP compliance.
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