Aquaculture wastewater treatment through microalgal. Biomass potential applications on animal feed, agriculture, and energy

The use of microalgae to remediate raw effluent from brown crab aquaculture was evaluated by performing batch mode growth tests using separately the Chlorella vulgaris (Cv), Scenedesmus obliquus (Sc), Isochrysis galbana (Ig), Nannocloropsis salina (Ns), and Spirulina major (Sp). Removal efficiencies in were 100% for total nitrogen phosphorus all microalgae. Chemical oxygen demand (COD) remediations above 72%. Biomass productivity varied 20.9 mg L?1 day?1 (N. salina) 146.4 (C. vulgaris). two best algae C. S. they tested semi-continuous growth, reaching productivities 879.8 811.7 day?1, respectively. bioremediation with a transfer system consisting three independent containers compared single container. container had same capacity received weekly volume as together. remediation 3 much higher than one. supplementation NaNO3 improve nutrient removal microalgae’ capacity, positive results. 96% COD. obtained biomass composed 31 35% proteins, 6 8% lipids, 39 30% carbohydrates, composition these suggest that it can be used novel sustainable ingredients feeds. algal Cv Sc biostimulants germination wheat watercress, very promising results attained, increases index 175% 48% watercress 84% 98% wheat, biomasses also subjected torrefaction process 72.5 ± 1.7% char yields. biochars seeds (wheat watercress) bio-adsorbent dye solutions.