Abstract: The disclosure, in one aspect, relates to hybrid ion-exchange and algae photosynthesis systems and processes for algae cultivation and treatment of high NH4+ concentration wastewater. The disclosed systems and methods can be further optimized using a disclosed mathematical model that can predict the hybrid ion-exchange and algae photosynthesis process including temporal evolution of the NH4+ concentration. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Abstract: The invention relates to a system and method to reduce perchlorate in wastewater utilizing perchlorate-reducing bacteria, sulfur as an electron donor and mollusk shells as alkalinity agent. Embodiments of the invention include a perchlorate-reduction system comprising a bioreactor unit having perchlorate-reducing media comprising elemental sulfur, oyster shells and a microbial community, and can further include an optional pretreatment unit, wastewater-catchment and/or post-treatment components. Embodiments of the method include multiple steps utilizing the system and additional process steps that achieve enhanced perchlorate reduction.

Abstract: The invention relates to a system and method to reduce perchlorate in wastewater utilizing perchlorate-reducing bacteria, sulfur as an electron donor and mollusk shells as alkalinity agent. Embodiments of the invention include a perchlorate-reduction system comprising a bioreactor unit having perchlorate-reducing media comprising elemental sulfur, oyster shells and a microbial community, and can further include an optional pretreatment unit, wastewater-catchment and/or post-treatment components. Embodiments of the method include multiple steps utilizing the system and additional process steps that achieve enhanced perchlorate reduction.

Abstract: The invention relates to a system and method to remove nitrogen, particularly nitrate, from wastewater utilizing denitrifying bacteria, sulfur as an electron donor and mollusk shells as alkalinity agent. Embodiments of the invention include a denitrification system comprising a bioreactor unit, denitrifying media comprising layers of elemental sulfur and oyster shells 3:1 by volume, and can further include a pretreatment unit and additional septic-system and/or wastewater-system components. Embodiments of the method include multiple steps utilizing the system and additional process steps that achieve increased autotrophic denitrification.