Waste handling method

• US 5,580,457 A
• Filed: 04/01/1994
• Issued: 12/03/1996
• Est. Priority Date: 10/23/1990
• Status: Expired due to Fees

• Current Assignee: SEEC, Inc. (Virtusa Corporation)
• Original Assignee: SEEC, Inc. (Virtusa Corporation)
• Inventors: Erickson, Stewart E.
• Primary Examiner(s): Wyse, Thomas G.
• Application Number:
  US08/222,409
• Time in Patent Office: 977 Days
• Field of Search: 210/603, 210/747, 210/612, 210/163
• US Class Current: 210/747.7
• CPC Class Codes: A01G 7/02 Treatment of plants with carbon dioxide
• CPC Class Codes: B61D 7/02 with discharge openings in the bottoms with body in two halves and discharge by tipping the halves B61D9/00
• CPC Class Codes: C02F 3/28 Anaerobic digestion processes
• CPC Class Codes: C05F 17/90 Apparatus therefor
• CPC Class Codes: C12M 21/04 for producing gas, e.g. biogas digesters for manure with production of biogas A01C3/028, biological treatment of water, waste water or sewage C02F3/00, C02F11/02, preparation of natural gas or syngas C10L3/06, C10L3/10
• CPC Class Codes: C12M 47/18 Gas cleaning, e.g. scrubbers; Separation of different gases separating dispersed particles from gases or vapours B01D45/00; separation of gases or vapours B01D53/00; gas washing apparatus for laboratory uses B01L5/04
• CPC Class Codes: Y02E 50/30 Fuel from waste, e.g. synthetic alcohol or diesel
• CPC Class Codes: Y02P 20/145 the feedstock being materials of biological origin
• CPC Class Codes: Y02T 30/00 Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
• CPC Class Codes: Y02W 10/37 using solar energy
• CPC Class Codes: Y02W 30/40 Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Abstract

The present invention provides a method of handling waste. In one embodiment, the invention provides a method for economically transporting waste from one location to another, treating the waste to produce a biogas, and utilizing a portion of that biogas to enhance plant growth and/or as a fuel source. In another embodiment, the method involves loading waste into the a waste-carrying vessel and transported to a remote treatment facility, where it is unloaded. The waste is then anaerobically digested at the treatment facility and a portion of the biogas resulting from the anaerobic digestion is utilized to enhance the growth of vegetation. The portion of the biogas so used is desirably relatively rich in carbon dioxide. The remaining portion of the biogas, which is desirably relatively rich in methane, and relatively carbon dioxide-poor, may then be combusted as a fuel source.

Claims

1. A method of handling waste, comprising:

a) providing transport means having a material-receiving cavity and a waste-receiving bladder carried within a portion of the cavity;

b) loading a flowable waste material into the bladder at a waste collection site;

c) transporting the waste material to a treatment facility, the treatment facility being located remotely of the collection site;

d) unloading the waste material from the bladder and delivering the waste to the treatment facility;

e) filling a portion of the material-receiving cavity of the transport means with a non-waste material;

f) transporting the non-waste material to a drop-off site located remotely of the treatment facility; and

g) anaerobically digesting the waste at the treatment facility to produce a biogas containing carbon dioxide, separating the biogas into a relatively carbon dioxide-rich gas and a relatively carbon dioxide-poor gas and utilizing the carbon dioxide-rich gas to enhance the growth of vegetation.

2. The method of claim 1 wherein the step of utilizing the carbon dioxide-rich gas to enhance growth of vegetation comprises delivering said carbon dioxide-rich gas to a trench having a floor, elevated side walls, and vegetation growing on the floor.

3. The method of claim 1 wherein the step of using the carbon dioxide-rich portion of the biogas to enhance growth of vegetation comprises the steps of planting vegetation in a trench having a floor and elevated side walls, permitting the vegetation to grow sufficiently to define a canopy spaced above the floor of the trench, and delivering the carbon dioxide-rich portion to the trench between the floor and the canopy.

4. The method of claim 3 further comprising the step of controlling the delivery rate and concentration of carbon dioxide in the carbon dioxide-rich portion of the biogas to maintain a carbon dioxide concentration within the trench between about 0.06% and about 5%.

5. The method of claim 1 further comprising the step of harvesting the vegetation for use as a fuel source.

6. A method of handling waste comprising:

a) providing a waste-carrying vessel comprising a material-receiving cavity and a waste-receiving bladder carried within a portion of the cavity and loading waste material into the bladder of the vessel;

b) transporting the vessel to a treatment facility located remotely of the collection site;

c) unloading the waste from the vessel and delivering the waste to the treatment facility;

d) anaerobically digesting the waste to produce a biogas; and

e) utilizing a portion of the biogas to enhance growth of vegetation.

7. A method of handling waste comprising:

a) loading waste material into a waste-carrying vessel at a waste collection site;

b) transporting the vessel to a treatment facility located remotely of the collection site;

c) unloading the waste from the vessel and delivering the waste to the treatment facility;

d) anaerobically digesting the waste to produce a biogas by loading at least a portion of the waste into a digestion module where the decomposition process occurs, agitating the waste within the module by rotating the module to promote the decomposition process, and extracting biogas produced during the decomposition process from the module; and

e) utilizing a portion of the biogas to enhance growth of vegetation.