Moving bed biofilm reactor system for selenium removal from water and wastewater

A method for wastewater treatment, comprising

• receiving wastewater having selenium at a wastewater treatment system comprising a first anoxic moving bed biofilm reactor (MBBR) and a second anoxic MBBR fluidly coupled to the first MBBR;
• treating the wastewater in the firsts MBBR to produce a treated wastewater by removing nitrogen from the wastewater, wherein the first anoxic MBBR comprises a first biofilm disposed on a first media;
• directing treated wastewater to the second MBBR;
• and treating the treated wastewater in the second anoxic MBBR to produce a selenium enriched fluid.

A control system, comprising:

• a processor configured to:
• receive one or more first signals from a plurality of first sensors disposed in a first anoxic moving bed biofilm reactor (MBBR), the one or more first signals representative of a condition of a first fluid being processed by the first MBBR;
• receive one or more second signals from a plurality of second sensors disposed in a second (MBBR), the one or more second signals representative of a condition of a second fluid being processed by the second MBBR;
• actuate a first actuator disposed in the first MBBR to remove nitrogen from the first fluid based on the first condition;
• and
• actuate a second actuator disposed in the second MBBR to produce a selenium enriched fluid based on the second condition.