Jeffrey R Zierdt

US Patent:

20140072994, Mar 13, 2014

Filed:

Sep 13, 2013

Appl. No.:

14/027121

Inventors:

Jeffrey Ray Zierdt - Monticello MN, US
Joseph Philip Burke - Edina MN, US

International Classification:

C12P 5/02

US Classification:

435 29, 435167, 4352871

Abstract:

Improved methods for anaerobic digestion of organic matter to produce biogas. Among the improvements given are including ferric iron in a hydrolysis reactor to increase the rate and efficiency of anaerobic hydrolysis to provide substrates for methanogenesis. A solids separation step is added after hydrolysis and before methanogenesis to improve the efficiency of the methanogenesis step. Other improvements involve using separate tanks for the hydrolysis and methanogenesis stages and using two (or more) methanogenesis tanks in sequence, and switching the order of the two (or more) methanogenesis tanks periodically.

US Patent:

20170044475, Feb 16, 2017

Filed:

Oct 30, 2016

Appl. No.:

15/338414

Inventors:

- Minneapolis MN, US
Jeffrey Ray Zierdt - Monticello MN, US
Joseph Philip Burke - Edina MN, US

International Classification:

C12M 1/107
C12P 5/02
C12M 1/12
C12M 1/00
C12M 1/36

Abstract:

Improved methods for anaerobic digestion of organic matter to produce biogas. Among the improvements given are including ferric iron in a hydrolysis reactor to increase the rate and efficiency of anaerobic hydrolysis to provide substrates for methanogenesis. A solids separation step is added after hydrolysis and before methanogenesis to improve the efficiency of the methanogenesis step. Other improvements involve using separate tanks for the hydrolysis and methanogenesis stages and using two (or more) methanogenesis tanks in sequence, and switching the order of the two (or more) methanogenesis tanks periodically.

US Patent:

20170044573, Feb 16, 2017

Filed:

Oct 30, 2016

Appl. No.:

15/338413

Inventors:

- Minneapolis MN, US
Jeffrey Ray Zierdt - Monticello MN, US
Joseph Philip Burke - Edina MN, US

International Classification:

C12P 5/02
C12M 1/34
C12M 1/00
C12M 1/107

Abstract:

Improved methods for anaerobic digestion of organic matter to produce biogas. Among the improvements given are including ferric iron in a hydrolysis reactor to increase the rate and efficiency of anaerobic hydrolysis to provide substrates for methanogenesis. A solids separation step is added after hydrolysis and before methanogenesis to improve the efficiency of the methanogenesis step. Other improvements involve using separate tanks for the hydrolysis and methanogenesis stages and using two (or more) methanogenesis tanks in sequence, and switching the order of the two (or more) methanogenesis tanks periodically.

US Patent:

20170044574, Feb 16, 2017

Filed:

Oct 30, 2016

Appl. No.:

15/338415

Inventors:

- Minneapolis MN, US
Jeffrey Ray Zierdt - Monticello MN, US
Joseph Philip Burke - Edina MN, US

International Classification:

C12P 5/02
C12M 1/00
C12M 1/107

Abstract:

Improved methods for anaerobic digestion of organic matter to produce biogas. Among the improvements given are including ferric iron in a hydrolysis reactor to increase the rate and efficiency of anaerobic hydrolysis to provide substrates for methanogenesis. A solids separation step is added after hydrolysis and before methanogenesis to improve the efficiency of the methanogenesis step. Other improvements involve using separate tanks for the hydrolysis and methanogenesis stages and using two (or more) methanogenesis tanks in sequence, and switching the order of the two (or more) methanogenesis tanks periodically.

US Patent:

20170044575, Feb 16, 2017

Filed:

Oct 30, 2016

Appl. No.:

15/338417

Inventors:

- Minneapolis MN, US
Jeffrey Ray Zierdt - Monticello MN, US
Joseph Philip Burke - Edina MN, US

International Classification:

C12P 5/02
C12M 1/34
C12M 1/107
C12M 1/00
C12M 1/33

Abstract:

Improved methods for anaerobic digestion of organic matter to produce biogas. Among the improvements given are including ferric iron in a hydrolysis reactor to increase the rate and efficiency of anaerobic hydrolysis to provide substrates for methanogenesis. A solids separation step is added after hydrolysis and before methanogenesis to improve the efficiency of the methanogenesis step. Other improvements involve using separate tanks for the hydrolysis and methanogenesis stages and using two (or more) methanogenesis tanks in sequence, and switching the order of the two (or more) methanogenesis tanks periodically.