United States of America, as Represented by the Secretary of Agriculture

North Carolina State University

Fetterman, Lewis M.

Ariel a. Szogi

Matias B. Vanotti

Patrick G. Hunt

Matias B Vanotti

Ariel A Szogi

Michael J Rothrock

Patrick G Hunt

Raul Moral Herrero

Patrick J Dube

Thomas F Ducey

Lewis M Fetterman

A system and method for separating nutrients, such as phosphorus and protein, from biological materials may be disclosed. Biological material, for example in the form of wet solids from raw manure, may first be separated out by a solid-liquid separator. The wet solids may then be dissolved in an acidic solution. The resulting supernatant from the acidic treatment may then be separated and phosphorus reclaimed therefrom. The resulting precipitate from the acidic treatment may be separated from the supernatant and treated with a basic solution. The resulting supernatant following the basic treatment may then be separated and protein reclaimed therefrom. In some embodiments, the supernatant resulting from the acidic treatment may itself be alkalinized, creating a precipitate which contains phosphorus solids and a supernatant which can be separated from the phosphorus solids and used as the basic solution with which to treat the precipitate resulting from the acidic treatment. Further, the system may be used to extract phosphorus and proteins from other biological materials, such as algae or crops.

Extraction of amino acids and phosphorus from biological materials

A system and method for separating nutrients, such as phosphorus and protein, from biological materials may be disclosed. Biological material, for example in the form of wet solids from raw manure, may first be separated out by a solid-liquid separator. The wet solids may then be dissolved in an acidic solution, which may be created directly or by fermentation. The resulting supernatant from the acidic treatment may then be separated and phosphorus reclaimed therefrom. The resulting precipitate from the acidic treatment may be separated from the supernatant and treated with a basic solution. The resulting supernatant following the basic treatment may then be separated and protein reclaimed therefrom. In some embodiments, the supernatant resulting from the acidic treatment may itself be alkalinized, creating a precipitate which contains phosphorus solids and a supernatant which can be separated from the phosphorus solids and used as the basic solution with which to treat the precipitate resulting from the acidic treatment. Further, the system may be used to extract phosphorus and proteins from other biological materials, such as algae or crops.

A system and method for capture of ammonia and phosphorus from an ammonia and phosphorus containing liquid effluent. The invention allows for the precipitation of phosphorus from said liquid effluent that has been under low aeration and has a pH of greater than about pH 9.

Systems and methods for recovering ammonium and phosphorus from liquid effluents

A system and method for passive capture of ammonia in an ammonia-containing liquid effluent. The invention allows for the passage of ammonia through microporous hydrophobic gas-permeable membranes and its capture in a circulated stripping solution with concomitant production of a concentrated non-volatile ammonium salt.

Systems and methods for reducing ammonia emissions from liquid effluents and for recovering the ammonia

A system and method for passive capture of ammonia in an enclosure containing material that gives off ammonia. The invention allows for the passage of gaseous NHthrough microporous hydrophobic gas-permeable membranes and its capture in a circulated acidic solution with concomitant production of a concentrated non-volatile ammonium salt.

Gaseous ammonia removal method

Systems and methods for reducing ammonia emissions from and for recovering the ammonia liquid effluents

Gaseous ammonia removal system

A process for removing phosphorus from solid poultry or animal wastes involving (a) mixing solid poultry or animal wastes with water and acid at a pH lower that about 5.0 and higher than about 3.0 to form (i) a liquid extract that contains suspended solids of about 3.5 g/L and soluble phosphorus and (ii) a washed solid residue (having a N:P ratio of at least more than 4 expressed on an elemental basis), (b) separating the liquid extract from the washed solid residue to form separated liquid extract and separated washed solid residue, (c) mixing the separated liquid extract with an alkaline earth base to a pH of about 8.0 to about 11.0, (d) mixing the liquid extract with a flocculant to form (i) precipitated phosphorus solids with POcontent greater than about 10% and (ii) a liquid, and (e) separating the precipitated phosphorus solids from the liquid to form separated phosphorus solids and separated liquid. The process is conducted at a temperature greater than about 5&#xb0; C. and less than about 50&#xb0; C. The solid poultry or animal wastes are not pretreated prior to mixing the solid poultry or animal wastes with water and acid; such pretreatments include those that may cause the complete or partial loss of oxidizable organic carbon and nitrogen.

Process for removing and recovering phosphorus from animal waste

Disclosed is an isolated bacterium strain, having Accession Deposit Number NRRL B-50286. The strain is capable of oxidizing ammonium and releasing di-nitrogen gas.

Anammox bacterium isolate

Compositions of bacteria which are effective for the nitrification of wastewater, particularly at low temperatures, are described. The compositions are comprised of 35 strains or populations of at least partially characterized isolated bacteria. These compositions may be used to treat wastewater contaminated with animal fecal waste and/or ammonia. In use, wastewater is contacted with the bacterial composition of the invention under aerobic conditions and for a period of time effective to oxidize ammonia therein.

High performance nitrifying sludge for high ammonium concentration and low temperature wastewater treatment

Wastewater treatment systems and processes for removal of solids, pathogens, nitrogen, and phosphorus from municipal and agricultural wastewater include the simultaneous separation of solids and phosphorus from wastewater and industrial effluents.

Wastewater treatment system with simultaneous separation of phosphorus and manure solids

Wastewater treatment systems and processes for: removal of solids, pathogens, nitrogen, and phosphorus from municipal and agricultural wastewater include nitrification of wastewater and increasing the pH of the nitrified wastewater by adding a metallic-containing salt and hydroxide to precipitate phosphorus to form a useable effluent having a specified nitrogen:phosphorus ratio that is useful as a fertilizer or spray for remediation of contaminated soils. The presence of infectious microorganism such as enteropathogenic bacteria and picarnoviruses will be reduced in the useable effluent. The precipitated phosphorus is recovered and used to form useable phosphorus products.

Growing community of inventors

Florence, SC, United States of America

Matias B Vanotti