The resultant liquid is an ideal growth medium for green algae and becomes a potent liquid fertilizer

The liquid effluent produced from the alternating aerobic and anaerobic digestion of vegetation—the digestate—is indeed an ideal growth medium for green algae and works as a potent liquid fertilizer. Here’s why:

• Nutrient-rich composition: Anaerobic digestate is rich in nitrogen, phosphorus, potassium, and micronutrients essential for plant and algal growth, coming from the breakdown of organic matter.ecorichenv+4

• Bioavailable nutrients: The digestion process converts a portion of organic nitrogen to ammonium and other mineralized nutrients, making the nutrients more readily available to plants and algae compared to untreated waste or manure.ontario+1

• Support for algal growth: Research and practical use show that the diluted liquid fraction from digesters creates an environment where green algae can proliferate rapidly, given sufficient light. This is both for experimental cultivation and for removing excess nutrients before field application.frontiersin

• Potent liquid fertilizer: When used as a fertilizer, this liquid digestate improves soil fertility, increases microbial activity, and reduces the need for synthetic fertilizers, making it valuable for both hydroponic and soil amendments.cycle0+3

• Pathogen and weed seed reduction: Compared to raw manure, the liquid from digesters has reduced pathogens and weed seeds, offering additional safety and efficacy as a fertilizer.europeanbiogas+1

In summary: The resultant liquid from such digestion systems is highly suitable for green algae cultivation and is widely used as a powerful, sustainable liquid fertilizer in both agricultural and controlled-environment settings.sciencedirect+3

1. https://www.epa.gov/agstar/benefits-anaerobic-digestion
2. https://www.ecorichenv.com/article/anaerobic-digestion-solutions
3. http://www.ontario.ca/page/anaerobic-digestion-basics
4. https://www.sciencedirect.com/science/article/pii/S0929139323002640
5. https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2022.770179/full
6. https://www.cycle0.com/benefits-digestate-vs-synthetic-fertiliser-farmers/
7. https://europeanbiogas.eu/wp-content/uploads/2015/07/Digestate-paper-final-08072015.pdf
8. https://www.epa.gov/anaerobic-digestion/environmental-benefits-anaerobic-digestion-ad
9. https://convertusgroup.com/anaerobic-digestion/
10. https://www.sciencedirect.com/science/article/abs/pii/S0959652616301998