May 06, 2021
Ash is the burned-out solid residue powdery product after oxidative thermo-chemical processing: oxidative combustion or semi-oxidative gasification processes. Ashes are characterized as fly ash or bottom ash or a combination thereof formed through the incineration of bio-based materials by oxidation. Co-incineration is an economically viable and widely applied waste disposal route for many nutrient-rich wastes. For nutrient recovery the mono incineration of defined biomass stream is necessary to control the input of contaminants and for concentration of the nutrient content Ashes obtained through incineration can be post-processed with the aim to partly remove metals and metalloids, and to increase the availability of plant nutrients in the ash complexes.
May 06, 2021
Altenative biomass refers to microalgae based biofertilisers from wastewater by heterotrophic microalgae process. It is a solid fertilizer (powder). Algae are a diverse group of aquatic organisms that have the ability to conduct photosynthesis. Duckweed (the Lemnaceae) is a family of aquatic plants that rich in protein. Both of them can make use of nutrients in solutions to produce biomass by algae cultivation which can be used as crop fertilizer. With the use of microbial fertilizers obtained from microalgae, the amount of soil organic matter and the water holding capacity are improved and have positive effects on soil, plants and therefore environment. As an organic fertilizer, microalgae have the potential to prevent nutrient losses through a gradual release of N, P and potassium (K), which is attuned to the plant requirements.