A Comparative Study on Various Pretreatment Methods of Anaerobic Digestion Piggery Effluent for Microalgae Cultivation
2025
Tao He | Qi Peng | Jun Qian | Liang Wei | Pei Han | Qian Lou
Anaerobic digestion piggery effluent (ADPE), dark brown with high turbidity and ammonium, inhibits algal growth and requires pretreatment for cultivation. This study compared various physical/biological pretreatment methods for microalgae cultivation. The results showed that the strategy of 10%ADPE fungal cultivation (10%AF) pretreatment and subsequent microalgae cultivation achieved maximum specific growth rate (0.094 d&minus:1) with productivity (0.014 g L&minus:1 d&minus:1) and significant nutrient removal: 100% ammonium nitrogen, 99% total nitrogen, 63% total phosphorus, 91% chemical oxygen demand. However, the pathogenic fungus used poses safety risks, requiring future screening of eco-friendly alternatives. This study demonstrated that the strategy could be a promising approach to algal biomass production and nutrient removal from ADPE.
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