TECHNOLOGY FOCUS - BIOLOGY - Preferred Method: The method further comprises: generating a biofuel from the lipid material; generating a biofuel from the tissues of the mollusks; and isolating a lipid material from the tissues of the population of the bivalve mollusks. The step of isolating the particulate matter from the culture system comprises a filtration method, a sedimentation method, a centrifugation method and/or a mechanical collection method. The step of isolating the lipid matter from the isolated pseudofecal particulate matter or mollusk tissues comprises a solvent extraction method, a steam extraction method, a chemical extraction method, a mechanical extraction method and/or an enzymatic extraction method. The step of generation of a biofuel from the tissues of the mollusks is by a thermal conversion process. The means for converting the algal-based particulate material into a biofuel is a thermal conversion process. The system further comprises a means for: isolating a lipid matter from the isolated algal-based particulate material, where the means comprises a solvent extraction system, a steam extraction system, a chemical extraction system, a mechanical extraction system, an enzymatic extraction system and/or a thermal conversion system; and harvesting a population of the mollusks from the culture system and a means of generating a biodiesel from the harvested mollusks. Preferred Components: The population of mollusks is a population of freshwater mollusks, marine mollusks or estuarine mollusks. The population of mollusks comprises at least one: freshwater species comprising Corbicula sp., Anodonta sp., Rangia sp., and/or Dreissena sp.; marine species comprising Ensis sp., Tagelus sp., Macoma sp., Crassostrea sp., Mya sp., Rangia sp., Polymesoda sp., and/or Perna sp.; and estuarine species comprising Mytilus sp., Anadara sp., Noetia sp., Mercenaria sp., Pectinidae sp., Geukensia sp., Ischadium sp., Petricola sp., Cyrtopleura sp., and/or Tagelus sp.. The population of algal cells comprises at least one species of Chlorella sp., Chlamydomonas sp., Scenedesmus sp., Isochrysis sp., Dunaliella sp., Tetraselmis sp., Nannochloropsis sp., Scenedesmus bijuga, Chlorella minutissima, Chlorella sorokiniana, Chlamydomonas globosa, Isochrysis galbana, Dunaliella tertiolecta, Tetraselmis suecica and/or Nannochloropsis oculata. The culture system comprises an aqueous medium and a substrate layer, where the substrate layer comprises rocks, gravel, sand and/or mud. The aqueous medium is flows relative to the mollusks. The means for isolating an algal-based particulate material from the culture system comprises a filtration system, a sedimentation system, a centrifugation system and/or a mechanical collection system.