Polyphosphate accumulating fungi was cultured to remove and recover the excessive phosphorus from dairy manure wastewater (DMW). The microbial treatment removed 83.9% of phosphorus in 20-fold diluted DMW by the fungal biomass in 12 h. At the meantime, 33.6% of chemical oxygen demand, 46.5% of total nitrogen, and 89.4% of total ammonia nitrogen were removed as well. At seventh reuse batch, the cells could still remove 50.4% of phosphorus from the diluted wastewater. The average phosphorus removal efficiency in seven reuse batches was calculated as 62.1%, the nitrogen-to-phosphorus ratio in DMW increased from 3.6 : 1 to 6.3 : 1. With the treatment, DMW will be more suitable for farmland irrigation, with the better nutritional ratio to support crop growth, and it will help mitigate phosphorus pollution to water bodies caused by over-applied phosphorus in the farmland.
Bibliographical noteFunding Information:
This work was supported by grants from Minnesota?s Discovery, Research, and Innovation Economy (MnDRIVE) Demonstration project. Legislative-Citizen Commission on Minnesota Resources (LCCMR)-Environment and Natural Resources Trust Fund, Minnesota is providing funding support for developing the Mycoalgae biofilm technology for environmental applications.
© 2018 CIWEM
- Mucor circinelloides
- dairy manure wastewater
- fungal biomass
- phosphorus removal
- unsterilized manure