US 2014/0370566 A1 · HIGH-NITROGEN LOADING FOR AMMONIA PROCESSING VIA ANAEROBIC DIGESTION

Abstract

A method and system to improve in vitro anaerobic digestion processes are disclosed. Simultaneous digestion of dairy manures with various food wastes improves anaerobic process stability and methane production. Co-digestion with blood meal and sweet clover (“BMSC”) at the proper concentrations improves nutrient balance and digestion, biogas production, gives more predictable ammonia concentrations, enhances nutrient content of soil amendment products, and increases the potential for production of ammonia-based fertilizer synthesis. Balanced introduction of BMSC with dairy manure increases methane production, reduces or eliminates co-digestion process limitations, and simplifies storage and delivery of the co-substrate. Following digestion, downstream or back-end products can be produced, including methane, and ammonium based fertilizers. Embodiments advantageously provide a treatment methodology for increased methane production while minimizing the anaerobic digestion process limitations from the use of raw animal wastes exclusively.

Claims20

Dependent claims

A method for high-nitrogen loading via anaerobic digestion, said method comprising:

feeding a substrate comprising a waste material having anaerobically biodegradable components into an anaerobic digester device, wherein said anaerobic digester device comprises a single stage anaerobic digester or a multi-stage anaerobic digester, wherein said anaerobic digester comprises monitoring temperature, mixing of organic waste, pH, and ammonia levels within a heated vessel of said anaerobic digester device;
feeding a co-substrate into said anaerobic digester device with said substrate;
and
co-digesting said substrate and said co-substrate in said anaerobic digester device to produce a biomass, a biogas, and a waste product, wherein nitrogen in said waste product and a high nitrogen organic and/or inorganic supplements are converted to a material comprising ammonia.

1 more element

A system for high-nitrogen loading via anaerobic digestion, said system comprising:

a substrate comprising a waste material having anaerobically biodegradable components fed into an anaerobic digester device, wherein said anaerobic digester device comprises a single stage anaerobic digester or a multi stage anaerobic digester, wherein said anaerobic digester comprises monitoring temperature, mixing of organic waste, pH, and ammonia levels within a heated vessel of said anaerobic digester device;
a co-substrate fed into said anaerobic digester device with said substrate;
and
said substrate and said co-substrate co-digested in said anaerobic digester device to produce a biomass, a biogas, and a waste product, wherein nitrogen in said waste product and a high nitrogen organic and/or inorganic supplements are converted to a material comprising ammonia.

1 more element

An apparatus for high-nitrogen loading via anaerobic digestion, said apparatus comprising:

an anaerobic digester device and a substrate comprising a waste material having anaerobically biodegradable components fed into said anaerobic digester device, wherein said anaerobic digester device comprises a single stage anaerobic digester or a multi-stage anaerobic digester, wherein said anaerobic digester comprises monitoring temperature, mixing of organic waste, pH, and ammonia levels within a heated vessel of said anaerobic digester device;
a co-substrate fed into said anaerobic digester device with said substrate;
and
said substrate and said co-substrate co-digested in said anaerobic digester device to produce a biomass, a biogas, and a waste product, wherein nitrogen in said waste product and a high nitrogen organic and/or inorganic supplements are converted to a material comprising ammonia.

1 more element

Dependencies are inferred from the claim text.

High-nitrogen loading for ammonia processing via anaerobic digestion

Life of this patent

High-nitrogen loading for ammonia processing via anaerobic digestion

Life of this patent

Abstract

Claims20