[특허]Systems and methods for digestion of solid waste

Systems and methods for digestion of solid waste 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C12M-001/00 C12M-001/107 C05F-017/00 C05F-017/02 C12P-005/02
출원번호	US-0931405 (2013-06-28)
등록번호	US-9328323 (2016-05-03)
발명자 / 주소	Christensen, Christian Boggild Smed
출원인 / 주소	AIKAN NORTH AMERICA, INC.
대리인 / 주소	Choate, Hall & Stewart LLP
인용정보	피인용 횟수 : 0 인용 특허 : 101

초록 ▼

This invention relates generally to systems and methods for digestion of solid waste that simplify solids handling. In certain embodiments, anaerobic methane extraction takes place for a period of time (e.g., from 1 to 4 weeks), after which an aerobic composting process begins in the same chamber. The organic waste remains in place and oxygen (e.g., in air) is forced into the chamber for an additional period of time (e.g., from 2 to 4 weeks). At the conclusion of the aerobic phase, the process yields a rough compost product that is stable and pathogen free. The rough compost can be further processed and blended to create high value engineered soils.

대표청구항 ▼

1. An apparatus for decomposition of organic matter into biogas and compost, the system comprising: a waste processing tank into which solid organic waste is loaded and in which hydrolysis and composting takes place at separate times, with composting of the solid organic waste taking place during a separate stage after hydrolysis is completed, wherein the waste processing tank comprises a drain at or near its base, the drain allowing flow of the percolation liquid out of the waste processing tank during the hydrolysis stage, the drain also serving as a vent through which air flows into and/or out of the solid organic waste in the waste processing tank during the composting stage;a controller programmed to automate addition of percolation liquid in the waste processing tank and initiate switchover from hydrolysis to composting according to pH in the waste processing tank;a spraying system configured to spray percolate liquid onto the solid organic waste in the waste processing tank during the hydrolysis stage, wherein the percolate liquid comprises fatty acids leached from the solid organic waste and wherein the percolate liquid is recycled from the base of the waste processing tank during the hydrolysis stage; anda biogas reactor tank into which the percolate liquid from the waste processing tank is pumped for generation of biogas under anaerobic conditions during a gasification stage. 2. The apparatus of claim 1, wherein the waste processing tank is configured to operate at ambient pressure during the hydrolysis stage, the composting stage, or both. 3. The apparatus of claim 1, wherein the waste processing tank is configured to operate under anaerobic conditions during the hydrolysis stage. 4. The apparatus of claim 1, further comprising a biofilter through which air from the waste processing tank passes prior to discharge to the atmosphere during the composting stage. 5. The apparatus of claim 1, further comprising a filter configured to separate solids from the percolate liquid. 6. The apparatus of claim 1, comprising at least two waste processing tanks connected in parallel. 7. The apparatus of claim 1, wherein the waste processing tank comprises an acid-resistant lining or coating. 8. The apparatus of claim 1, wherein the biogas reactor tank is gastight. 9. The apparatus of claim 1, further comprising a heater for heating the percolate liquid either in the biogas reactor tank or outside the biogas reactor tank. 10. The apparatus of claim 1, wherein the biogas reactor tank comprises a sump to separate sediment and/or particles from the percolate liquid. 11. The apparatus of claim 1, further comprising a liquid process tank into which percolate liquid from either the biogas reactor tank, the waste processing tank, or both flows prior to being pumped to the spraying system for spraying onto the solid organic waste in the waste processing tank during the hydrolysis stage. 12. The apparatus of claim 11, wherein percolate liquid from both the biogas reactor tank and the waste processing tank flows into the liquid process tank prior to being pumped to the spraying system for spraying onto the solid organic waste in the waste processing tank during the hydrolysis stage. 13. The apparatus of claim 12, further comprising a filter tank configured to separate solids from the percolate liquid before the percolate liquid enters the liquid process tank. 14. The apparatus of claim 11, comprising one liquid process tank for every waste processing tank. 15. The apparatus of claim 14, comprising at least five waste processing tanks for each of one or more biogas reactor tanks.

이 특허에 인용된 특허 (101)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Systems and methods for digestion of solid waste 원문보기

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