TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: The microalgae/cyanobacteria are green microalgae/cyanobacteria or freshwater microalgae/cyanobacteria. The microalgal strain is a phylum of Chlorophyta. The microalgal strain is a family of Pleurochloridaceae. The microalgal strain is a species of Trachydiscus sp. or Chlorogibba sp.. The microalgal strain is a species of Dictyosphaerium chlorelloides. The cyanobacterial strain is an order of Chroococcales. The cyanobacterial strain is a genera of Synechocystis or Synechococcus. The microalgal strain is a strain of Chlorogibba allorgei deposited with the Culture Collection of Algae and Protozoa under the accession number CCAP 817/1, or a mutant strain derived from it. The microalgal strain is a strain of Dictyosphaerium chlorelloides deposited with the Culture Collection of Algae and Protozoa under the accession number CCAP 222/98, or a mutant strain derived from it.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The production phase corresponds to the exponential phase of growth. The production phase involves growth of the microalgal or cyanobacterial strain under conditions that permit exponential growth. The production phase involves growth of the microalgal or cyanobacterial strain in a photobioreactor. The production phase involves growth of microalgae and/or cyanobacteria under LEDs emitting 2 peaks of red and blue light within the PAR spectrum of 400-700 nm. The cultures are not exposed to natural sunlight. The microalgal or cyanobacterial culture is exposed to the stimulus at the peak of exponential phase growth and/or at the onset of the stationary phase of growth. In the process-I or II, after the pH decrease, the pH is increased to a pH of 7-9. In the process-I or II, following exposure of the microalgae or cyanobacteria to the stimulus, the microalgae or cyanobacteria are cultured for a further period of 48 hours prior to the harvesting of the metabolite. The pH of the process water is 7-9. The temperature is maintained at 20-29 degrees C in the adaptation stage. The microalgae and/or cyanobacteria are exposed to light wavelengths of 400-700 nm. The microalgae and/or cyanobacteria are exposed to LEDs emitting a peak of red light of 500-665 nm, preferably 660 nm, and a peak of blue light of 440-500 nm, preferably 460 nm. The microalgae and/or cyanobacteria are exposed to light with irradiance levels of 50-200 mu mole/m2/second. The adaptation stage involves: culturing the microalgal or cyanobacterial strains for a period of at least 3 months; culturing the microalgal or cyanobacterial strains for at least 6 generations of growth; and multiple rounds of sub-culturing the microalgal or cyanobacterial strains. The microalgae or cyanobacteria are sub-cultured once per month. The production phase involves: growth of the adapted microalgal or cyanobacterial strain in a photobioreactor; and culture of the adapted microalgal and/or cyanobacterial strain under conditions that permit exponential growth. The production phase involves culture of the adapted microalgal and/or cyanobacterial strain under the same lighting conditions as used for growth during the adaptation phase. The production phase is followed by a step comprising exposure of the microalgal or cyanobacterial culture to a stimulus to induce enhanced production of metabolites. The process-III, industrial by-products such as spent process water and carbon dioxide are used as reclaimed sources of nutrients and carbon to tune/adapt the algae for enhanced growth using these inputs. The process-III comprises using optimized wavelengths of light, process water and nutrient addition. The algae are maintained under the adaptation stimuli (select PAR light wavelengths and light source, process water source and other growth media constituents) to continue the adaptation selection of algae cells. The specific conditions are sub-optimal for growth of non-adapted algae. The algal cells are adapted to LED lighting, optionally at a wavelength of 400-700 nm. The algal cells are adapted to treated process water. The first stage is performed in a culture vessel which optionally has a thickness of 3-11 cm. The method-VIII further comprises monitoring the cell density in the first stage and adding fresh nutrient medium to the first stage and transferring culture from the first stage to the second stage in response to an increase in cell density in the first stage above a designated level to maintain the cell density at the designated level. The step (iib) is implemented by successively transferring culture from the first stage to a second stage, where exopolysaccharide production occurs in the second stage reaction tanks simultaneously with cell growth in the first stage. The exopolysaccharide is produced by cultivation of Dictyosphaerium chlorelloides, optionally strain ALG03, or other species in the same family. The method-VIII further comprises using the algal biomass as a root soil conditioner. Preferred Components: The stimulus comprises a decrease in pH from a pH of 7-9 to a pH of 5-6. The stimulus comprises an increase in LED-delivered irradiance of 50-200 mu mole/m2/second to 400-2000 mu mole/m2/second. The stimulus additionally comprises addition of a carbon source. The decrease in pH is initiated by the addition of carbon dioxide. The pH is lowered to a pH of 5-6 for a period of 30 minutes to 2 hours, and the period precedes the increase in light irradiance. The light is generated by LEDs emitting 2 peaks of red and blue light within the spectrum of light wavelengths of 400-700 nm. The illumination rate of incident light energy is higher in the first stage than in the second stage. The illumination rate of incident light energy on cells closest to the light source is 50-500 mu mole/m2/second during the first stage and 30-200 mu mole/m2/second during the second stage. The incident light energy during the second stage has an energy content of 400-700 nm. The biomass is delivered via a subsurface drip irrigation system. ACTIVITY - Fertilizer.    MECHANISM OF ACTION - None given.