Methods and systems for treating fluid using a biochemical process under vacuum pressure

A system that is configured to treat a fluid having a particulate fraction and a soluble fraction, the system comprising:

• a treatment chamber that is configured to receive the fluid and physically and biochemically transform solids in the particulate fraction with microbes;
• and
• a vacuum chamber that is configured to (i) receive at least a portion of the fluid that has been physically and biochemically transformed in the treatment chamber;
• (ii) apply a vacuum pressure to the received fluid;
• (iii) evaporate off at least a portion of the soluble fraction of the received fluid as evaporate so that a thickened fluid remains in the vacuum chamber;
• and (iv) recirculate at least some of the thickened fluid to the treatment chamber so that it is further physically and biochemically transformed;
• and
• a discharge stream coupled to the treatment chamber that discharges at least some of the thickened fluid.