Biogas Technology

BioTec innovative waste pre sorting process that yields organics better than 95% clean

Both MSW and SSO requires that recyclables be sorted out first, followed by separating organics from non organics and sand, stones, glass. The represented advanced pre sorting process for large amounts of waste requires crushing, screening, baling, magnetic separation, featured turbo dissolvers followed by light and heavy particles dewatering, and sand separation to arrive at a organic slurry suitable for the biogas reactor.

Innovative biogas technology – higher efficiency, shorter retention time and smaller space requirement

The key word for research and new development is bionics – learning from nature and achieving technical implementation. The manufacturer of energy systems in Germany developed a new kind of high performance fermenter by imitating farm animals – the UDR fixed-bed digester. Their rumen and intestine structure shows lamellar intestinal villi and lobes, on which micro-organisms adhere and commute organic material within a very short period energetically. In the UDR fermenter, the same process occurs. The upflow – downflow reactors (UD) are each fitted with a fixed-bed register consisting of many corrugated pipes that provide ten times the surface area of traditional fermenters for high concentrated settlement of bacteria. The standard 4m diameter and 11m high finely tuned tank pair allows precise temperature and flow control throughout the biomass. The reflow tank provides for added retention and a rapid biological fermentation process by returning the biomass through another upflow and downflow cycle. The patented UDR fixed-bed reactors guarantee higher biogas production in fewer days with a minimum of energy consumption and small footprint requirement.

Fresh feedstock and mostly digested feedstock from Reflow enter the Upflow tank and float up along the bacteria colonies. It then overflows to the Downflow tank where molecules with gas bubbles flow to the Reflow tank for further fermentation. Reflow tank biomass gets pumped back to the Upflow tank and recirculates until fully digested. The retention time in the Upflow and Downflow tank is 1 to 2 days. The fully digested heavy sludge sinks in the Downflow tank and is pumped out at the bottom as digestate in form of organic fertilizer.

Our engineering partner has the North American rights to this state-of-the art technology that has been proven by installations in Germany for the past four years.

The UDR technology is ideal for converting food waste,industrial biowaste,farm waste/manure and biosolids to renewable energy.

The produced biogas is typically burned in a CHP (Combined Heat and electrical Power) engine to yield renewable electric power and heat. Optionally, the biogas can be upgraded to biomethane, a clean burning fuel for a vehicle fleet or inserted into the natural gas pipeline system for distribution.

Wet gasification system to convert non organics as well as cellulose, lignin and toxins into syngas that allows for clean exhaust CHP power generation

The feedstock is pre treated in a saline solution and heated in an autoclave to 200 degree C prior being gasified at 900 degree to produce syngas. This patented process allows for impurities and toxins to be converted to non soluble salts as the only residue besides rocks and glass all of which can be used as concrete filler. Another advantage of this pre treatment process is the fact that the gasifier does not get tar build up which typically shuts present technology gasifyers down after a short time. The salt gets recycled and there is no burning or resulting smoke.
The generated sysgas consists only of hydrogen and carbon monoxide and when burned in a CHP results in a clean exhaust. After many years of lab and small unit testing, the initial large scale facility will come online in the spring converting some 80,000 tons of driftwood a year to renewable energy.

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Patented Upflow & Downflow Reactors

The highly efficient standard Building Blocks of the UDR Biogas Plant are 4m dia by 11m high. The Reflow tank size is calculated based on Feedstock Quantity and Retention Time.

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Product Approach assures lower Cost

The UDR AD Systems are fabricated in Ohio and are expandable for increasing Feedstock Quantities. The MonoTube accepts as little as 8 tons while a six UD pair and two Reflow tank System will be fed 700 tons of organics per day for 8.4MW electric ... under construction.

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