Process for deodorizing liquid manure and removing harmful gases

• US 4,160,656 A
• Filed: 05/02/1978
• Issued: 07/10/1979
• Est. Priority Date: 05/26/1977
• Status: Expired due to Term

• Current Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
• Original Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
• Inventors: Junkermann, Helmut
• Primary Examiner(s): Scovronek, Joseph
• Assistant Examiner(s): Konkol, Chris
• Application Number:
  US05/902,111
• Time in Patent Office: 434 Days
• Field of Search: 71/1, 71/11, 71/12, 71/13, 71/21, 71/22, 71/28, 71/31, 210/63 R
• US Class Current: 71/21
• CPC Class Codes: C05F 3/00 Fertilisers from human or animal excrements, e.g. manure
• CPC Class Codes: Y02A 40/20 Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
• CPC Class Codes: Y02P 20/145 the feedstock being materials of biological origin
• CPC Class Codes: Y10S 210/916 Odor, e.g. including control or abatement

Abstract

Liquid manure is deodorized and harmful gases removed therefrom by introducing formaldehyde and a peroxy compound into the manure one or more times.

Claims

1. A process for deodorizing liquid manure and removing harmful gases therefrom comprising applying to the liquid manure formaldehyde and a peroxy compound in the weight ratio of formaldehyde (100 weight % basis) and peroxy compound (100 weight % basis) of 1:

3 to 3;

1.

2. A process according to claim 1 wherein the formaldehyde and peroxy compound are premixed with each other prior to mixing with the liquid manure.

3. A process according to claim 2 wherein the formaldehyde and peroxy compound are added as an aqueous solution to the liquid manure.

4. A process according to claim 3 wherein the peroxy compound has a solubility in water of at least 10%.

5. A process according to claim 4 wherein there is employed a 30 to 50% aqueous formaldehyde solution and a 10 to 40% aqueous peroxy compound solution to form said premixture, the weight ratio of formaldehyde to peroxy compound is from 1:

3 to 3;

1.

6. A process according to claim 1 wherein the peroxy compound is hydrogen peroxide, urea peroxide, potassium monoperoxysulfate, sodium persulfate, potassium persulfate, ammonium persulfate, sodium percarbonate or a percarboxylic acid.

7. A process according to claim 6 wherein the peroxy compound is ammonium persulfate.

8. A process according to claim 7 wherein the formaldehyde and ammonium persulfate are premixed in a weight ratio of 1:

3 to 3;

1 and the formaldehyde and ammonium persulfate are added as an aqueous solution to the liquid manure.

9. A process according to claim 8 wherein there is employed 1 to 6 liters of the deodorizing solution per cubic meter of liquid manure.

10. A process according to claim 6 wherein there is employed 1 to 6 liters of aqueous deodorizing solution containing the formaldehyde and peroxy compound in the weight ratio of 1:

3 to 3;

1 per cubic meter of liquid manure.

11. A process according to claim 1 wherein there is employed 1 to 6 liters of an aqueous solution of the formaldehyde and peroxy compound per cubic meter of liquid manure.

12. A process according to claim 1 wherein the peroxy compound is added in crystalline form to aqueous formaldehyde to form a premix and this premix is then added to the liquid manure.

13. A process according to claim 9 wherein the weight ratio of formaldehyde to ammonium persulfate is 1:

1.

14. A process according to claim 6 wherein the weight ratio of formaldehyde to peroxy compound is 1:

1.

15. A process according to claim 1 wherein the weight ratio of formaldehyde to peroxy compound is 1:

1.