US 12,384,707 B2 · System and method for treatment of animal manure containing wastewater

Abstract

Methods of treating animal organic material are disclosed herein. The methods include diluting the animal organic material to produce an organic material slurry, anaerobically digesting the organic material slurry to produce a biogas and a digestate, separating the digestate to produce a digestate solids and a filtrate, removing ammonia from the filtrate, removing organic contaminants and divalent anions from the filtrate, concentrating the filtrate to produce a retentate and a permeate, combining the digestate solids and the retentate to produce a solids product, and returning the permeate to dilute the animal organic material. Systems for treatment of animal organic material are also disclosed herein. The systems include a dilution tank, an anaerobic digester, a first solids-liquid separation subsystem, an ammonia-reducing column, a second solids-liquid separation subsystem, a production water storage tank, and a solids product tank.

Claims26

Dependent claims

A method of treating animal organic material comprising solids, the method comprising:

diluting the animal organic material to produce an organic material slurry;
anaerobically digesting the organic material slurry to produce a biogas and a digestate comprising ammonia;
separating the digestate to produce a digestate solids and a filtrate having less than 1 ppm total suspended solids (TSS);
removing ammonia from the filtrate to produce an ammonia-depleted filtrate;
removing organic contaminants and divalent anions from the ammonia-depleted filtrate to produce an organic containing reject comprising divalent anions and an organic-depleted filtrate;
concentrating the organic-depleted filtrate to produce a concentrated retentate and a return permeate;
combining the digestate solids, the organic containing reject, and the concentrated retentate to produce a solids product;
and
directing the return permeate to dilute the animal organic material.

6 more elements

A system for treating an animal organic material comprising solids, comprising:

a dilution tank having a first inlet fluidly connected to a source of the animal organic material, a second inlet, and an organic material slurry outlet;
an anaerobic digester having an inlet fluidly connected to the organic material slurry outlet, a biogas outlet, and a digestate outlet;
a first solids-liquid separation subsystem having an inlet fluidly connected to the digestate outlet, at least one digestate solids outlet, and a filtrate outlet, the first solids-liquid separation subsystem configured to produce a filtrate having less than 1 ppm total suspended solids (TSS);
an ammonia-reducing column having an inlet fluidly connected to the filtrate outlet, a countercurrent source of an acid, and an ammonia-depleted filtrate outlet;
a second solids-liquid separation subsystem having an inlet fluidly connected to the ammonia-depleted filtrate outlet, at least one retentate outlet, and at least one return permeate outlet, the second solids-liquid separation subsystem configured to produce a return permeate having 200-500 ppm total dissolved solids (TDS);
a production water storage tank having an inlet fluidly connected to the at least one return permeate outlet and an outlet fluidly connected to the second inlet of the dilution tank;
and
a solids product holding tank having a first inlet fluidly connected to the at least one digestate solids outlet and a second inlet fluidly connected to the at least one retentate outlet.

5 more elements

Dependencies are inferred from the claim text.

System and method for treatment of animal manure containing wastewater

Life of this patent

System and method for treatment of animal manure containing wastewater

Life of this patent

Abstract

Claims26