The Microalgae Chlorella

Use

  • Juvenile fish food
  • Supplementary food for fish and decapods
  • Own food mixtures

Systematics

  1. Phylum Chlorophyta (green algae)
  2. Class Chlorophyceae (green algae in the narrower sense)
  3. Order Chlorococcales (spherical algae without hostages)
  4. Family Oocystaceae
  5. » Cells singly or in small colonies
  6. » Cell walls smooth, warty or with long bristles
  7. » Reproduction exclusively by aplanospores (autospores: the aplanospores take on their final shape in the cell)
  8. » Reproduction by autospores is typical of the family
  9. Genus Chlorella
  10. » Green spherical algae
  11. » Cells round, membrane very thin, cells always single, chloroplast bell-shaped, eccentric vacuole
  12. » Reproduction by autospores, 4 to 16 of which develop in the mother cell
  13. » Distributed in all fresh waters
  14. » Very small: only 5 - 10 µm
  15. » About 10 species that are very difficult to differentiate
  16. » Symbionts in protozoa, among others
  17. Species vulgaris
Chlorella in the microscope

Culture

  • In tap water with a hydroponic fertiliser
  • The culture must be aerated
  • Obtained by sedimentation over several hours

For easier digestion in commercial applications. the cell wall is gently broken down (this consists of otherwise indigestible cellulose).

Literature

Dr Ingo Botho Reize, DATZ 54(2), 60 (2001). - Brief report
Dr Ingo Botho Reize, Koralle 2(8), 36 (2001).

Typical composition

General [%]
Protein 55.9
Carbohydrates 15.0
Fats 7.0
Ash 7.0
Protein [%]
Amino acids, essential  
Isoleucine 3.0
leucine 4.7
Lysine 3.8
Methionine 0.8
Phenylalanine 3.0
Threonine 2.6
Tryptophan 0.9
Valine 3.2
Amino acids, non-essential  
Alanine 3.2
Arginine 4.0
Asparagine 5.0
Cystine 0.4
Glutamine 6.0
Glycine 3.2
Histidine 1.0
Proline 3.4
Serine 2.2
Tyrosine 1.7
Colouring agents [mg/kg]
Carotenoids, total 1.200
Chlorophyll 21.000
Vitamins [mg/kg]
Vitamin A 600.0
Ascorbic acid (C) 220.0
Biotin (H) 1.9
Cyanocobalamin (B12) 0.10
Ca-pantothenate 13.0
Folic acid 0.27
Inositol 1.500
Niacin 230
Pyridoxine (B6) 5.0
Riboflavin (B2) 6.0
Thiamine (B1) 4.0
Tocopherol (E) 66.0
p-Aminobenzoic acid (PABA) 0.6
Minerals / Trace elements [mg/kg]
Calcium (Ca) 4.810
Strontium (Sr) 34.7
Phosphorus (P) 9.770
Iron (Fe) 1.004
Sodium (Na) 16.920
Magnesium (Mg) 3.017
Manganese (Mn) 23.3
Molybdenum (Mo) < 0.5
Zinc (Zn) 16.7
Tin (Sn) < 0.2
Potassium (K) 16.400
Selenium (Se) < 2.0
Lithium (Li) 0.1
Chromium (Cr) 3.0
Copper (Cu) 2.6
Cobalt (Co) < 0.5
Iodine (I) < 5.0
Heavy metals [mg/kg]
Arsenic (As) < 0.01
Lead (Pb) < 0.01
Cadmium (Cd) < 0.01
Mercury (Hg) n.n.