Conversion of solid waste to methane

In Sweden, the compressed biogas is used as a transportation fuel for cars and buses. Importantly, lignocellulosic feedstocks do not interfere with food security. The number 1 issue is handling human waste. Thus, the digester has sufficient methane bacteria to consume acids that are generated as fast as those acids are produced by the acid producing bacteria.

Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of Grant No. However, such static containers suffer from mass transfer problems resulting from the presence of non-homogenous material and the lack of mixing, thus resulting in a low biogas yield.

When a charge of solid waste is to be introduced into the retort, the upper door 7 is opened while the lower door 9 remains closed. For more information on LFG energy project technology options and the advantages and disadvantages of each, see Chapter 3.

The process for feeding the bioreactor is unique. After an acidic environment they will be introduced to a methane-producing environment that additionally removes pathogens through microbial competition.

Therefore, its application has been limited. Still another advantage of the present invention is that it provides for the use of practically unlimited volume. Another embodiment of the present invention comprises a method of methane generation comprising providing a digester comprising at least one upright wall and a floor defining a vessel, disposing a cover over the vessel to seal the vessel, providing an entrance to the vessel and disposing organic solid waste through the entrance into the vessel sprinkling water on the solid waste, providing acid producing bacteria to digest the solid waste and methane producing bacteria to convert the acids to biogas, draining a leachate from the floor, and recirculating the leachate to sprinkle the leachate over the solid waste.

Also, the reactors described are heavy metal and large equipment is needed to remove the caps or covers of such reactors. Only limited condensate removal and filtration treatment are required, although some modifications of existing combustion equipment might be necessary.

Heating pipes are disposed in floor to circulate hot water and thus heat vessel Generally speaking, regions of the world where populations are dense and land is limited e. This hot ash, in addition, protects the gratings from overheating; utilizes the carbon carried with the ash, thereby minimizing unreacted carbon; and, drops only inerts for removal.

Waste to Energy – Solution for Tomorrow’s Energy

One of the following two reactions take place in the hydrogen make-up system. Exposure to humans however is again a risk that must be accounted for. The cryogenic gas treatment and separation unit 60 is operable to separate the gases into condensable and non-condensable components by subliming or "freezing out" condensable components of relatively low volatility, e.

Almost any organic material can be processed with anaerobic digestion. The remaining uncondensed gas is drawn from knock-out drum 41 through line 43 by gas compressor Biogas can be used for producing electricity and heat, as a natural gas substitute and also a transportation fuel.

Upgraded LFG LFG can be upgraded to a high-Btu gas through treatment processes by increasing its methane content and, conversely, reducing its CO2, nitrogen and oxygen contents. Descriptions of project technologies are included under each project type. The vessel can therefore be easily opened, vented, and loaded and reloaded as needed.

The most important consideration, which has not necessarily always been effectively managed, is the danger pathogens in human waste pose to health.

The digester of further comprising a heating system disposed in said pad. Accordingly all modifications and equivalents may be resorted to which fall within the scope of the invention as claimed.

Moreover, inasmuch as the gas charged to the purification system 60 is practically free of carbon dioxide, it can readily be separated into two fractions without need for a fractionating column. Ultrafiltration is practical for concentrated wastewaters that have had most solids settled out. However, the heavier fraction separated by the cryogenic purification and separation system comprises methane and up to C4 hydrocarbons which can readily be converted to hydrogen in an economical manner.

Energy Recovery from the Combustion of Municipal Solid Waste (MSW)

The present invention thus provides for rapid inoculation and startup of the digester which in turn results in higher biogas production and a shorter digestion period.

The lighter fraction separated by the cryogenic gas separation and purification system 60 consists of CO and H2. Variations and modifications of the present invention will be obvious to those skilled in the art and it is intended to cover all such modifications and equivalents.

Compacting waste at an active landfill Waste trucks at active landfill Closed cell of active landfill Closed landfill LFG collection systems can be configured as vertical wells or horizontal trenches.

However, this biogas can be captured and turned into energy through anaerobic digestion, and then sold into the electricity grid. If the MSW landfill is active: A second step is to clean towers 67,63 by revaporizing components remaining in the towers 67, 63 from previous cycles by withdrawing them through vacuum pump 87 and compressor Bottom ash usually has a moisture content of percent by dry weight.

The digester of wherein said drainage system comprises a floor drain. In this study, a two-stage system converting organic solid waste (food waste + sewage sludge) to H 2 and CH 4 was operated.

In the first stage of dark fermentative hydrogen production (DFHP), a recently proposed method that. Global solid waste generation is increasing rapidly. In13 percent of the global population lived in cities and generated less thanmetric tons of trash per day.

or conversion of waste (e.g., composting, recycling) sometimes are confused with disposal. and thoughtfully implemented policies can encourage the shift toward. Total Solids, Volatile Solids Total Solids (TS)= Dry matter content of substrate Inverse of moisture content one of the most variable parameters between substrates water Volatile Solids (VS)= Combustible proportion of TS, organic matter Non-volatile Solids (Ash)= Inorganic material (Minerals, salts), does not contribute to methane.

Does Burning Garbage to Produce Electricity Make Sense?

Cold conversion of food waste into renewable energy and fertilizer environment to convert solid food waste into renewable energy and organic as methane carries a global warming potential.

Municipal solid waste landfills (MSWLFs) receive household waste. MSWLFs can also receive non-hazardous sludge, industrial solid waste, and construction and demolition debris. All MSWLFs must comply with the federal regulations in 40 CFR Part (Subtitle D.

5. Biomass Conversion Technologies Bioenergy consists of solid, liquid, or gaseous Solid biomass Wet biomass (organic waste, manure, etc.) Vegetable oil Methane is a greenhouse gas (GHG) that is 22 to 24 times more powerful than carbon dioxide (CO 2.

Conversion of solid waste to methane
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