# US 5,707,416 A · Method of recovering byproduct heat during composting

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- Number: US 5,707,416 A
- Document ID: US5707416A
- Status: Granted
- Kind: A
- Application number: 08/651,972
- Filed: 1996-05-21
- Granted: 1998-01-13
- Earliest claimed: 1993-09-10
- Inventors: David A. Sudrabin
- Web page: https://patentgrep.com/patent/US5707416A

## CPC

- C05F 17/60: Heating or cooling during the treatment
- C05F 17/964: Constructional parts, e.g. floors, covers or doors
- C05F 17/979: the other material being gaseous
- F24V 99/00: Subject matter not provided for in other main groups of this subclass
- Y02P 20/145: the feedstock being materials of biological origin
- Y02W 30/40: Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
- C05F: ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- F24V: COLLECTION, PRODUCTION OR USE OF HEAT NOT OTHERWISE PROVIDED FOR
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

The disclosure explains various methods of recovering byproduct heat from a compost stack while the compost stack is in a bacteria active stage. Several beneficial uses of the recovered heat are explained with specific examples given. Usage of the recovered heat to accelerate a bacteria active stage in a second compost stack provides for uniform degradation of the compostable material contained within the second compost stack. This results from reduction of areas within the compost stack which are at differing periods within the composting cycle. Alternatively, usage of the recovered heat to heat a building is explained. Various shapes of aeration plates are explained with examples given.

## Claims

### Claim 1

A method of recovering byproduct heat from a compost stack while the compost stack is in a bacteria active stage, the method comprising the steps of:
a) providing a composting system comprising:
1) a plurality of aeration plates to receive the compost stack thereupon;
2) a support surface to provide for receiving the aeration plates in a single layer;
3) a perimeter barrier surrounding the single layer of aeration plates;
4) a manifold conduit area between the support surface and the single layer of aeration plates and at least partially surrounded by the perimeter barrier;
5) numerous air passages from the manifold conduit area through the single layer of aeration plates;
6) air flow means to provide for moving air flow within the manifold conduit area;
b) providing heat recovery means to provide for transferring heat from beneath the compost stack to an external usage;
whereby the compost stack produces heat as a byproduct of the bacteria active stage and the heat recovery means transfers the heat for the external usage.

### Claim 2 (depends on 1)

The method defined in claim 1 wherein the external usage comprises heating a building adjacent the composting system.

### Claim 3 (depends on 1)

The method defined in claim 1 wherein the external usage comprises introduction of the heat into the lower extent of a second compost stack to uniformly accelerate a bacteria active stage within the second compost stack.

### Claim 4 (depends on 1)

The method defined in claim 1 further comprising range maintenance means to provide for control of temperatures within the compost stack within a predetermined range of temperatures.