Closed-Loop Biological Systems and Methods Utilizing an Onsite Non-Potable Water Treatment for Odor Control Irrigation

A method for treating a contaminated air stream to remove selected compounds using microorganisms selected for air treatment in a media bed without use of potable water, comprising:

• receiving a contaminated water stream;
• screening the contaminated water stream to remove at least particles with a size greater than about ¼ inch;
• treating the contaminated water stream to form a non-potable irrigation water stream;
• passing the contaminated water stream through a water treatment media bed supporting water treatment microorganisms selected to reduce contaminant compounds in the contaminated water stream;
• recirculating a portion of the non-potable irrigation water stream back through the water treatment media bed;
• and
• controlling flow of the contaminated water stream and the recirculated non-potable irrigation water stream through the media bed to control the level of contaminant removal such that contaminant levels in the non-potable irrigation water stream are greater than potable water contaminant levels but below levels harmful to the microorganisms selected for air treatment;
• directing the contaminated air stream through at least one air treatment media supporting the microorganisms selected to reduce or remove at least one odor causing compound;
• irrigating the air treatment media and microorganisms therein with the non-potable irrigation water;
• and
• exhausting the contaminated air stream from the at least one air treatment media to produce a treated air stream.

A biological odor control system operable in the absence of a potable water supply, comprising:

• an air treatment reactor vessel containing an odor control media supporting microorganisms selected to remove at least one odor causing compound from contaminated air;
• a contaminated air inlet and a treated air outlet communicating with the air treatment reactor vessel and defining an airflow path through said odor control media;
• an irrigation water outlet disposed in the air treatment reactor vessel above the odor control media;
• a sump configured at the bottom of the air treatment reactor vessel to receive irrigation water and direct irrigation water after flowing through the odor control media to a drain;
• an irrigation water reactor vessel containing a water treatment media supporting microorganisms selected to reduce contaminant compounds in a contaminated water stream to levels not harmful to the microorganisms supported on the odor control media in the air treatment reactor vessel;
• a contaminated water inlet and a treated irrigation water outflow communicating with the irrigation water reactor vessel and defining a water flow path through said water treatment media;
• at least one contaminated water pump communicating with the contaminated water inlet and controlled to provide a flow of contaminated water through the irrigation water reactor vessel at a flow rate modulated to produce a non-potable irrigation water stream at the treated irrigation water outflow containing contaminants at a level less than harmful to the microorganisms contained in the air treatment reactor vessel;
• an irrigation water tank configured to receive treated irrigation water from the treated irrigation water outflow;
• and
• an irrigation water supply configured to deliver irrigation water from the irrigation water tank to the irrigation water outlet in the air treatment reactor vessel.