In a culturing method, microalgae are cultured in a culturing solution while a gas containing carbon dioxide is supplied to the culturing solution. In an ion concentration acquisition step, an acquired value of a concentration of hydrogen carbonate ions in the culturing solution is obtained. In an ion concentration adjustment step, in the case that the acquired value does not reside within a set concentration range that is set beforehand, at least one of a temperature or a pH of the culturing solution is adjusted, whereby the concentration of hydrogen carbonate ions in the culturing solution is adjusted to reside within the set concentration range.

A method for planting submerged plants is disclosed. The method includes the steps of selecting a combination of two submerged plants; planting the combination of submerged plants; measuring a biomass and evaluating the biomass. By discussing the influence of planting proportion on the biomass of submerged plant community, the structure of submerged plant community can be optimized, and the success rate of submerged vegetation restoration and reconstruction can be improved by using the positive interaction between plant species. In addition, the submerged plants can improve the surrounding environmental conditions through positive interaction, so that the neighboring species can survive in the previously non-survivable environment, thereby increasing the species diversity of the community and constructing the submerged vegetation community structure; the positive interaction between submerged plants can promote the restoration of submerged vegetation in eutrophic lakes, and has ecological restoration effect on eutrophic waters.

A method for planting submerged plants is disclosed. The method includes the steps of selecting a combination of two submerged plants; planting the combination of submerged plants; measuring a biomass and evaluating the biomass. By discussing the influence of planting proportion on the biomass of submerged plant community, the structure of submerged plant community can be optimized, and the success rate of submerged vegetation restoration and reconstruction can be improved by using the positive interaction between plant species. In addition, the submerged plants can improve the surrounding environmental conditions through positive interaction, so that the neighboring species can survive in the previously non-survivable environment, thereby increasing the species diversity of the community and constructing the submerged vegetation community structure; the positive interaction between submerged plants can promote the restoration of submerged vegetation in eutrophic lakes, and has ecological restoration effect on eutrophic waters.

Compostable seaweed-based compositions, and associated systems and methods are disclosed herein. In some embodiments, the seaweed-based composition comprises (i) a phycocolloid including agar, alginate, carrageenan, and/or unprocessed seaweed, (ii) a polymer comprising thermoplastic starch (TPS), polycaprolactone (PCL), polylactic acid (PLA), polyhydroxyalkanoates (PHA), polyesteramide (PEA), polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), and/or polyvinyl alcohol (PVOH), and (iii) an additive, wherein the phycocolloid comprises no more than 90 wt% of the seaweed-based composition, the biopolymer comprises no more than 80 wt% of the seaweed-based composition, and the additive comprises no more than 50 wt% of the seaweed-based composition.

Compostable seaweed-based compositions, and associated systems and methods are disclosed herein. In some embodiments, the seaweed-based composition comprises (i) a phycocolloid including agar, alginate, carrageenan, and/or unprocessed seaweed, (ii) a polymer comprising thermoplastic starch (TPS), polycaprolactone (PCL), polylactic acid (PLA), polyhydroxyalkanoates (PHA), polyesteramide (PEA), polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), and/or polyvinyl alcohol (PVOH), and (iii) an additive, wherein the phycocolloid comprises no more than 90 wt% of the seaweed-based composition, the biopolymer comprises no more than 80 wt% of the seaweed-based composition, and the additive comprises no more than 50 wt% of the seaweed-based composition.

The present invention relates to a system and method for cultivating an seaweed, preferably Sarcothalia crispata, including releasing spores from seaweed reproductive tissue, inoculating a substrate with spores, germinating the spores and growing seaweed from the germinated spores. The invention also relates to a harvested batch of seaweed having a lambda carrageenan content of at least about 80 wt.% based on mass of all carrageenans and wherein the mass of seaweed is at least 100 kg, more preferably at least 500 kg and most preferably at least 1000 kg.

The present invention relates to a system and method for cultivating an seaweed, preferably Sarcothalia crispata, including releasing spores from seaweed reproductive tissue, inoculating a substrate with spores, germinating the spores and growing seaweed from the germinated spores. The invention also relates to a harvested batch of seaweed having a lambda carrageenan content of at least about 80 wt.% based on mass of all carrageenans and wherein the mass of seaweed is at least 100 kg, more preferably at least 500 kg and most preferably at least 1000 kg.

According to present disclosure, there is disclosed an algae growth and cultivation system that provides a cost-efficient means of producing algae biomass as feedstock for algae-based products, such as, fertilizer, feed, biofuel manufacture, and desirably impacts, nutrient recovery from waste streams for valued byproducts production, recycle water, and alternative/renewable energy production. The system as discussed herein is an integrated systems approach to wastewater treatment, algal strains selection for byproducts production, and recycle of algal biomass-processing waste or additional algae harvested as feedstock for products such as fertilizer production. Embodiments of a system as discussed herein present an economically viable algae production system and process that allows algae-derived products such as fertilizer, feed, biofuels, etc. to compete with non-organic or petroleum products in the marketplace.

A hydroponic plant production apparatus comprising: a hollow grow tube with a slot formed in the front face of the grow tube, and a matrix media insert composed of two halves, where the media is insertable into the grow tube, allowing plants to be inserted and grown between the two halves of the matrix media insert in the grow tube. Methods for use of a hollow grow tube with a slot formed in the front face of the grow tube, and a matrix media insert composed of two halves, where the media is insertable into the grow tube, allowing plants to be inserted and grown between the two halves of the matrix media insert in the grow tube.

A hydroponic plant production apparatus comprising: a hollow grow tube with a slot formed in the front face of the grow tube, and a matrix media insert composed of two halves, where the media is insertable into the grow tube, allowing plants to be inserted and grown between the two halves of the matrix media insert in the grow tube. Methods for use of a hollow grow tube with a slot formed in the front face of the grow tube, and a matrix media insert composed of two halves, where the media is insertable into the grow tube, allowing plants to be inserted and grown between the two halves of the matrix media insert in the grow tube.