WO2008154744A1

WO2008154744A1 - A method of recycling of a mixture of domestic and industrial waste

Info

Publication number: WO2008154744A1
Application number: PCT/CA2008/001171
Authority: WO
Inventors: Vadym V. Milotskyy; Svitlana E. Ilina; Anatoliy I. Yavorskyy; Vladymyr M. Ilin; Roman V. Milotskyy
Original assignee: Yavorska, Oksana
Priority date: 2007-06-21
Filing date: 2008-06-20
Publication date: 2008-12-24
Also published as: UA82806C2

Abstract

A method of recycling of domestic and industrial waste is provided. The disclosure illustrates decomposition of organic compounds in a reaction vessel, by thermal photolysis by subjecting a chemical substance or a mixture of substances to the effect of ultraviolet radiation of the 200-450 nm band in the presence of inorganic melts containing eutectic alloys of bismuth with a melting point in the 45°C to 145°C range. The process is carried out at temperatures of 100-300°C in the presence of aqueous vapor.

Description

A METHOD OF RECYCLING OF A MIXTURE OF DOMESTIC AND INDUSTRIAL

WASTE

Field of Disclosure

[0001] The disclosure relates to thermal recycling of a mixture of organic domestic and industrial waste, in particular to recycling of waste and waste mixtures of: polymers, paper products, leather, alimentary products, oil slurries, spent motor oil, pesticides, peat, mud waste generated at city sewage biological treatment plants, etc. and may be used in municipal services, chemical, petrochemical and other industries for recycling of hydrocarbon waste into solid and gaseous fuels.

Background

[0002] Methods are known for incineration of domestic and industrial waste, per Bernyamovskiy D.N. Termicheskiye metody obezvrezhivaniya tverdykh bytovykh otkhodov [Thermal methods of disposal of solid domestic waste] M. Stroyizdat, 1979, p. 192; and Ekolohichni aspekty termichnoho zneshkodzhennya neprydatkhykh otrutokhimikativ, pidred. V. G. Petruka [Environmental aspects of thermal disposal of useless chemical pesticides, editor V. G. Petruk] Vinnytsia, Universam, 2006, p. 236.

[0003] Some shortcomings of the methods lie in unreasonably high energy expenditures; limited field of application, as furnaces for waste incineration normally process only particular types of waste; a quick deterioration of the fire-resistant walls; a low hourly production capacity due to difficulties with heat recovery; a necessity to use oxygen-enriched air.

[0004] A method is known of a reagent high-temperature disposal of waste of any origin, per Ukrainian Patent No. 27700 / Sposib spaliuvannia vidhodiv bud-yakoho pokhodzhennia, scho mistyat toksychni rechovyny iprodukt vypaly [A method of incineration of waste of any origin that contains toxic substances and baking products], filed 10/16/2000.

[0005] A disadvantage of the method are the high energy expenditures, as the incineration takes place at the temperatures of 900-1100⁰C; furthermore, the incineration method generates hazardous gaseous emissions, which require additional processing by means of lime which leads to the quantity of waste in significantly larger quantities than the primary ones. [0006] Another known method of catalytic disposal of industrial and domestic waste is a thermal aerosol nanocatalysis, per Ukrainian Patent No. 67540 / Sposib zdiysnennia gazofaznykh khimichnykh protsesiv aerozolnym nanokatalizom [A method of implementation of gas-phase processes by aerosol nanocatalysis], filed 08/10/2003; and RF Patent No. 2081695 / Sposob osyshchestvleniya gazofazhnykh khimicheskikh protsessov (aerosolniy kataliz) [A method of implementation of gase-phase chemical processes (aerosol catalysis)], filed 06/20/97.

[0007] The disadvantages of the method are a complex technical equipment, process control difficulties, big energy expenditures for the processing, a necessity of using molecular sieves (to avoid carryover of entrained catalyst), which are very costly and have a short service life.

[0008] Another known method of disposal of toxic industrial products and domestic waste by means of their incineration in inorganic compound melts, which interact chemically with processed product to yield reaction products, is described in RF Patent No. 2081642 / Sposob pererabotki toksichnykh promyshlennykh produktov i ustroistvo dlia ego osushchestvleniya [A method of processing of toxic industrial products and a device for implementation thereof], filed 06/20/97). The processing is being carried out at temperatures of 1300-2000K in the presence of oxygeneous gas and inorganic melts, the latter being metallurgical dross containing oxides of calcium, magnesium, silicium and iron.

[0009] The shortcomings of the method are its multistaging and high energy costs. Furthermore, it should be noted that the method does not allow obtaining decomposition products of any energy value, nor does it eliminate a possibility for neogenesis of toxic compounds due to oxidation processes.

[0010] Modern disposal methods such as reagent recycling and further catalytic decomposition have limited possibilities in terms of changing the chemical composition and optimization of the process of disposal of solid waste, and do not eliminate the use of high temperatures.

[0011] Disposal of domestic and industrial waste is implemented mostly by thermal decomposition methods. High energy expenditures, complex equipment used, low speeds of the process as well as limited control over intermediary phases are offset by the high degree of knowledge and predictability of the process, therefore, its upgrading was mostly limited to expanding the range of catalysts used in the process and improving the design of the reaction vessels. [0012] Expanding the range of catalysts used and utilization of ultraviolet radiation resolve to some extent the degree of energy savings. However, diffusion of high molecular weight compounds from the volume of solid materials is the limiting process stage, which does not permit an economic use of modern industrial plants, which, furthermore, are characterized by a complex design of reactors, quite significant energy expenditures and costs.

Summary

[0013] An aspect of the disclosure lies in the following.

[0014] One aspect is to provide an economical treatment method and process that provides more complete or complete decomposition of an organic substance regardless of its aggregate state and concentration while excluding generation of environmentally hazardous compounds.

[0015] In one aspect, a method of processing waste by thermal photolysis of organic compounds in a chamber is provided. The method comprises: loading the waste onto a surface of an eutectic bismuth alloy; exposing the waste to ultraviolet radiation in the 200^50 nm band; and heating the waste to a target temperature of between 100 and 300°C. In the method, the eutectic bismuth alloy has a melting point of between 45 and 145⁰C.

[0016] In the method, the waste may be heated for one hour.

[0017] In the method, the eutectic bismuth alloy may be a four component Guthrie's alloy having a melting temperature of approximately 45°C.

[0018] In the method, the target temperature may be approximately 100⁰C.

[0019] In the method, the target temperature may be approximately 200⁰C.

[0020] In the method, the target temperature may be approximately 300⁰C.

[0021] In the method, the eutectic bismuth alloy may be a four component Wood's alloy having a melting temperature of approximately 7O⁰C.

[0022] In the method, the waste may comprise at least any one of wood product, peat waste, polyethylene terephthalate, potato waste, DDT and polyethylene film. [0023] In another aspect, a waste processor for processing waste by thermal photolysis of organic compounds is provided. The waste processor comprises: a chamber having an interior cavity; an eutectic bismuth alloy located in the interior cavity for supporting the waste; an ultraviolet radiation source located in the interior cavity generating ultraviolet radiation inside the chamber in the 200- 450 nm band; a heater for heating the interior cavity to a temperature of between 100 and 300°C; and a control module to control the ultraviolet radiation source and the heater. In the chamber, the eutectic bismuth alloy has melting point of between 45 and 145°C.

[0024] In other aspects, various sets and subsets are provided. In other aspects, various operating parameters are provided as listed in Table 1.

Brief Description of Drawings

[0025] The disclosure provides, by way of example only, with reference to the accompanying drawings, in which:

[0026] Fig. 1 is a schematic representation of an exemplary reaction chamber providing a treatment system in accordance with an embodiment; and

[0027] Fig. 2 is a table of data of results provided by the treatment system of Fig. 1.

Detailed Description of Embodiments

[0028] The description which follows and the embodiments described therein are provided by way of illustration of an example or examples of particular embodiments of the principles of the present disclosure. These examples are provided for the purposes of explanation and not limitation of those principles and of the disclosure. In the description which follows, like parts are marked throughout the specification and the drawings with the same respective reference numerals.

[0029] Technical results provided by the disclosure include any one or more of:

-recycling of waste (for example domestic and / or industrial waste) by means of ultraviolet radiation on the surface of eutectic bismuth alloys having a coefficient of heat transmission, which is approximately three or four times higher than that of an ordinary steel surface; -providing decomposition of organic compounds in any aggregate state;

-preventing generation of hazardous substances and their entry into the environment;

-decreasing materials and energy consumption in comparison with existing industrial methods.

[0030] The above technical results during implementation of the disclosure is achieved by recycling a mixture of domestic and industrial waste out under the influence of ultraviolet radiation in approximately the 200-450 nm band in the presence of aqueous vapor and inorganic melts in an ambient environment at temperatures of approximately 100-300⁰C on the surface of eutectic bismuth alloys whose melting point ranges approximately from 45⁰C to 145°C. One feature of an embodiment is that it is carried out without addition of oxygen to eliminate oxidation of metals being a part of the eutectic alloy.

[0031] Besides, the use of two-, three- and four-component eutectic alloys of bismuth with other metals permits achieving, at relatively low temperatures, up to and including 100 % diffusion of volatile substances generated by decomposition of organic compounds that constitute the waste.

[0032] In the method claimed, the decomposition of organic substances that form the waste is carried out mostly at a temperature that ensures weakening of the bonds due to formation of hydrocarbon vapor and excitation of electrons in the alloy elements under the influence of thermal radiation and ultraviolet radiation, which causes formation of volatile products (hydrogen, methane) and solid residue (carbon).

[0033] The disclosure provides a single-stage process of decomposition of organic compounds with high decomposition levels without addition of oxygeneous toxic compounds, as in an embodiment by-reactions customary for high-temperature oxidation processes do not occur.

[0034] Results of experiments establishes the process provided in the disclosure follows the above pattern when paper, wood, textile, leather, polymers, food waste, peat, pesticides and mixtures thereof are used as primary products.

[0035] A high level of conversion of primary feedstock is provided by the radical nature of the process, which in turn is conditioned by energy characteristics of UV radiation range which coincides with the energy characteristics of the eutectic alloys described. The level of decomposition of primary feedstock is also influenced by temperature in the reactor, upon which the energy of excitation of elements forming the alloy depends and which must be higher than the melting point of the chosen alloy.

[0036] It is noted that the presence of moisture in the primary products does not stimulate oxidation processes and formation of toxic compounds, as formation of ozone required for the reaction is impossible in this energy range.

[0037] An embodiment provides a process and processor in a single stage in a single vessel at relatively low temperatures and may be implemented at ambient atmospheric pressure; when liquid non-toxic products are present, in one embodiment only their condensation is required. Volatile decomposition products containing mostly hydrogen and hydrocarbons as well as solid carbon residue may be utilized as fuels. As such, material and energy expenditures are relatively insignificant, ensuring thereby an indisputable cost-effectiveness of process and method described herein as compared to known technologies.

[0038] As such, attributes of an embodiment specified in the formula and characterizing the described method are sufficient for achieving the required technical result.

[0039] Aspects of an embodiment are illustrated by tables specifying the parameters of decomposition process for the specified examples.

[0040] Information that confirms the possibility of implementing an embodiment with the required technical result lies in the following.

[0041] Referring to Fig. 1 , in one embodiment, a method of recycling of a mixture of domestic and industrial waste of organic origin is implemented in a reaction vessel (100) with the volume of, for instance, 5 liters, equipped with a source of ultraviolet (UV) radiation (12), a reaction chamber (10) containing an eutectic bismuth alloy (16), a heating element (14), a loading (18) and discharge (20) hatch, a transport mechanism (22) and a nozzle (24) for taking off of gaseous reaction products, control instruments (thermocouple, etc.) (30). The heating element is used to maintain atemperature of approximately 100⁰C to 300⁰C in the reaction vessel. The vessel is loaded with waste reduced to fragments of approximately 5 mm maximum and moisturized, which are uniformly distributed over the surface of the eutectic alloy by the transporting element and subjected to the action of the heat and ultraviolet radiation while continuously taking overhead the resulting products. A mixer to mix the waste on the alloy may be provided. A fan to impel the gases to the nozzle may be provided. The heater may provide direct or indirect heat. The heater may have one or more sensors thereon to detect the current heat of the chamber. There may be one or more heaters. There may be one or more sources of ultraviolet radiation placed in various locations in the chamber. The UV radiation may have one or more sensors thereon to detect the current levels of UV being generated. The control instruments may be microprocessor-based devices have software operating thereon to control one or more of the above noted components in the chamber.

[0042] In the reaction chamber, under the influence of thermal radiation, the eutectic alloy and the ultraviolet radiation in approximately the 200—450 nm band undergoes a process of decomposition of organic compounds with the formation of hydrogen, hydrocarbons and partially carbon-oxygen. The resultant gas- vapor mixture is passed via a cooler (26) where aqueous vapors (32) are condensed and collected into a pan (28). The condensed liquid is used for moisturizing of primary waste or solid carbon when the latter is briquetted to obtain solid fuel.

[0043] The process is easily controlled by electromechanical control systems (30) having sensors and computer-operated control systems. The chamber is shown as a representative configuration. The chamber may provide a closed system, but adjustable venting may also be provided. One or more elements may be provided in different locations or as different embodiments to implement their described functions.

[0044] A mixture of domestic waste used for the experiment was made according to the data about sorting of domestic waste and had the following approximate composition: paper and carton - 50% wt.; organic products - 37% wt, polymers - 8% wt; wood, textile, leather - 5% wt. Inorganic components (iron, glass, sand and ceramics) were excluded from the mixture. See L. Shtarke. Ispolzovanie promyshlennykh i bytovykh otkhodov plastmass [Utilization of industrial and domestic plastic waste], L. Khimia, 1987, p. 175.

[0045] Aspects of an embodiment are illustrated by examples. Each example is identified as being either "positive" or "negative", where a positive experiment provides an acceptable waste processing level and a negative experiment provides a not acceptable waste processing level. In different conditions, thresholds for what is a positive or negative result can change (up or down), depending on requirements and operating conditions. The label of an example as being positive or negative is not meant to be necessarily deem the parameters of the example as being acceptable or not acceptable. However, for one embodiment, the labels indicate acceptable and not acceptable parameters.

[0046] Exemplary conditions for acceptability (or non-acceptability) include minimum levels of decomposition product yields for one or more of the volatile, liquid and / or solid products. Another condition for acceptability (or non-acceptability) may be required levels (minimum or maximum) of the composition of gaseous products for one or more of hydrogen, methane, ethane, CO, CO₂ and air. Ranges and / or tolerances may be provided for the acceptable and / or non-acceptable levels. Other elements may be used as parameters in the decomposition product yield and / or the composition of the gaseous products.

EXAMPLE 1 (positive)

[0047] The temperature of approximately 100⁰C is maintained in the apparatus equipped with a reaction chamber containing a eutectic four-component Guthrie's alloy (Bi - 50% wt.; Sn - 21.1% wt.; Pb - 20.5% wt.; Cd - 14.3% wt.) having the melting point of 45⁰C. A mixture of ground and moisturized waste is loaded into the apparatus and distributed uniformly over the surface of the eutectic alloy with the help of the transporting element. The waste mixture is kept in the reaction zone for approximately one hour under radiation in approximately the 200-450 nm band.

[0048] Gaseous products of decomposition of the domestic waste pass through a cooler, where aqueous vapor is condensed and collected into a pan.

[0049] Analysis of gaseous product samples was made by chromatographic method.

[0050] Results of measurement of concentrations of obtained components are shown in Table 1.

EXAMPLE 2 (positive)

[0051] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to example 1 , but a temperature of approximately 200⁰C is maintained in the reaction vessel. The measurement results are also shown in Table 1. EXAMPLE 3 (positive)

[0052] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to Example 1, but a temperature of approximately 300°C is maintained in the reaction vessel. The measurement results are also shown in Table 1.

EXAMPLE 4 (negative)

[0053] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to Example 1, but a temperature of approximately 35O⁰C is maintained in the reaction vessel. The measurement results are also shown in Table 1. It is noted that the decomposition product yields for volatile and solid products are lower than those in Examples 1 to 3 and that the composition of gaseous products for CO is lower than those in Examples 1 to 3.

EXAMPLE 5 (negative)

[0054] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to Example 1 , but a temperature of approximately 90⁰C is maintained in the reaction vessel. The measurement results are also shown in Table 1. It is noted that the decomposition product yield for volatile and liquid products are lower than those in Examples 1 to 3 and that the composition of gaseous products for hydrogen, methane, ethane, CO and CO₂ are lower than those in Examples 1 to 3.

EXAMPLE 6 (positive)

[0055] The temperature of approximately 100⁰C is maintained in the apparatus equipped with a reaction chamber containing a eutectic three-component Newton's alloy (Bi - 50% wt; Sn - 18.75% wt.; Pb - 31.25% wt.;) having the melting point of 96⁰C. A mixture of ground and moisturized waste is loaded into the apparatus and distributed uniformly over the surface of the eutectic alloy with the help of the transporting element. The waste mixture is kept in the reaction zone for approximately one hour under radiation in approximately the 200-450 nm band.

[0056] Gaseous products of decomposition of domestic waste pass through a cooler, where aqueous vapor is condensed and collected into a pan. [0057] Analysis of the gaseous product samples was made by chromatographic method.

[0058] Results of measurement of concentrations of obtained components are shown in Table 1.

EXAMPLE 7 (positive)

[0059] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to Example 6, but a temperature of approximately 200°C is maintained in the reaction vessel. The measurement results are also shown in Table 1.

EXAMPLE 8 (positive)

[0060] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to Example 6, but a temperature of approximately 300⁰C is maintained in the reaction vessel. The measurement results are also shown in Table 1.

EXAMPLE 9 (negative)

[0061] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to Example 6, but a temperature of approximately 350°C is maintained in the reaction vessel. The measurement results are also shown in Table 1. It is noted that the decomposition product yields for volatile and solid products are lower than those in Examples 6 to 8, that the composition of gaseous products for CO₂ is higher than those in Examples 6 to 8 and that that the composition of gaseous products for CO is lower than those in Examples 6 to 8.

EXAMPLE 10 (negative)

[0062] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to Example 6, but a temperature of approximately 90⁰C is maintained in the reaction vessel. The measurement results are also shown in Table 1. It is noted that the decomposition product yields for volatile and liquid products are lower than those in Examples 6 to 8 and that the composition of gaseous products for hydrogen, methane, ethane, CO and CO₂ are lower than those in Examples 6 to 8. EXAMPLE 11 (positive)

[0063] A temperature of approximately 200°C is maintained in the apparatus equipped with a reaction chamber containing an eutectic two-component POV alloy (Bi - 58% wt.; Sn - 42% wt.) having the melting point of 145⁰C. A mixture of ground and moisturized waste is loaded into the apparatus and distributed uniformly over the surface of the eutectic alloy with the help of the transporting element. The waste mixture is kept in the reaction zone for approximately one hour under radiation in approximately the 200-450 nm band.

[0064] Gaseous products of decomposition of the domestic waste pass through a cooler, where aqueous vapor is condensed and collected into a pan.

[0065] Analysis of gaseous product samples was made by chromatographic method.

[0066] Results of measurement of concentrations of obtained components are shown in Table 1.

EXAMPLE 12 (positive)

[0067] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to Example 11, but a temperature of approximately 300°C is maintained in the reaction vessel. The measurement results are also shown in Table 1.

EXAMPLE 13 (negative)

[0068] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to Example 11, but a temperature of approximately 35O⁰C is maintained in the reaction vessel. The measurement results are also shown in Table 1. It is noted that the decomposition product yield for solid products is lower than those in Examples 11 and 12, that the composition of gaseous products for CO is lower than those in Examples 11 and 12 and that the composition of gaseous products for hydrogen, ethane, and CO₂ is higher than those in Examples 11 and 12. EXAMPLE 14 (negative)

[0069] Decomposition of a waste mixture according to the suggested method is carried out in the manner similar to Example 11 , but a temperature of approximately 9O⁰C is maintained in the reaction vessel. The measurement results are also shown in Table 1. It is noted that the decomposition product yield for volatile and liquid products are lower than those in Examples 11 and 12 and that the composition of gaseous products for hydrogen, methane, ethane, and CO₂ is lower than those in Examples 11 and 12.

[0070] It may be seem from Examples 1-14 that lowering the temperature below 100⁰C does not necessarily exclude execution of a process of an embodiment of decomposing organic compounds; however, the hydrogen and hydrocarbon yield in this case may be insignificant. Increasing the temperature above 300⁰C facilitates the hydrogen and hydrocarbon yield by stimulating the oxidation processes with formation of CO₂ and H₂O, if small quantities of air are present in the ground waste mixture. Also, Examples 10 and 14 show that the eutectic alloys only start triggering the hydrocarbon decomposition upon reaching their melting point. As such, one acceptable range of execution is in a temperature of between 100 and 300 ⁰C. In another embodiment, another acceptable range of execution is in a temperature of above 90 ⁰C and below 350 ⁰C. Other temperature ranges may be used in other operating environments or conditions.

[0071] Information confirming the possibility of implementing an embodiment on certain types of waste, fuel and pesticides is shown in Examples 15-20.

EXAMPLE 15 (positive)

[0072] In the apparatus equipped with a combustion chamber containing a four-component Wood's alloy (Bi - 50% wt; Sn - 12.5% wt.; Pb -25% wt.; Cd - 12.5% wt.) having the melting point of 70⁰C, the temperature is maintained at approximately 200⁰C. The apparatus is charged with the ground and watered wood waste by means of transporting element, and then the waste is distributed uniformly over the surface of the eutectic alloy with the help of the transporting element. The waste is kept in the reaction zone for approximately one hour under radiation in approximately the 200- 450 nm band. [0073] Gaseous products of decomposition of the wood waste pass through a cooler, where aqueous vapor is condensed and collected into a pan.

[0074] Analysis of the gaseous product samples was made by chromatographic method.

[0075] The elemental composition and yields of the decomposition products are shown in Table 1.

EXAMPLE 16 (positive)

[0076] Decomposition of waste according to the suggested method is carried out in the manner similar to Example 15, but the reaction zone of the apparatus is charged with ground and moisturized leather waste, and the process is carried for approximately one hour under the temperature of approximately 200⁰C.

[0077] The elemental composition and yields of the products of decomposition of the polyethylene film are shown in Table 1.

EXAMPLE 17 (positive)

[0078] Decomposition of waste according to the suggested method is carried out in the manner similar to Example 15, but the reaction zone of the apparatus is charged with ground potato waste, and the process is carried for approximately one hour under the temperature of approximately 200⁰C.

[0079] The elemental composition and yields of the products of decomposition of the potato waste are shown in Table 1.

EXAMPLE 18 (positive)

[0080] Decomposition of waste according to the suggested method is carried out in the manner similar to Example 15, but the reaction zone of the apparatus is charged with ground peat waste, and the process is carried for approximately one hour under the temperature of approximately 200⁰C.

[0081] The elemental composition and yields of the products of decomposition of the peat waste are shown in Table 1. EXAMPLE 19 (positive)

[0082] Decomposition of waste according to the suggested method is carried out in the manner similar to Example 15, but the reaction zone of the apparatus is charged with ground and moisturized waste of polyethylene terephthalate, and the process is carried for approximately one hour under the temperature of approximately 200⁰C.

[0083] The elemental composition and yields of the products of decomposition of the potato waste are shown in Table 1.

EXAMPLE 20 (positive)

[0084] Decomposition of waste according to the suggested method is carried out in the manner similar to Example 15, but the reaction zone of the apparatus is charged with ground and moisturized 10% DDT, pesticide and the process is carried for approximately one hour under the temperature of approximately 200⁰C.

[0085] The resultant condensate has acid reaction (e.g. pH=2, approximately) due to formation of hydrogen chloride and its dissolution in water, as no chlorine was detected in gaseous products.

[0086] The elemental composition and yields of the products of decomposition of the potato waste are shown in Table 1.

[0087] It may be seen from the above that decomposition of organic compounds of various origin in the presence of aqueous vapor and eutectic alloys of bismuth with various metals yields only low molecular weight (gaseous) substances that have a sufficiently high energy value and can be used as alternative fuel sources.

[0088] The solid carbon residue is also of energy value and can be used as solid fuel after briquetting.

[0089] However, one advantage is that the process can be carried out at sufficiently low temperature and its increase does not affect the hydrogen and hydrocarbon yield. [0090] The suggested method is cost effective, requires relatively small capital investments and meets the environmental standards.

[0091] Therefore, the disclosure illustrates that during implementation of the method claimed compliance is achieved with the following totality of conditions:

-the means of implementation of the claimed method is designed to protect the environment against chemical pollution;

-for the claimed method, as characterized in the invention formula, possibility of implementing thereof using the means and methods described in the application has been proved.

[0092] As used herein, the wording "and / or" is intended to represent an inclusive-or. That is, "X and / or Y" is intended to mean X or Y or both.

[0093] In this disclosure, where a value is provided as an approximate value (for example, when the value is qualified with the word "approximately"), a range of values will be understood to be valid for that value. For example, for a value stated as an approximate value, a range of about 1%, 2%, 5% or 10% larger and 1%, 2%, 5% or 10% smaller than the stated value may be used. Per the examples, the noted one hour exposure time vary per the ranges described herein. Values of features are illustrative of embodiments and are not limiting unless noted.

Claims

1. A method of processing waste by thermal photolysis of organic compounds in a chamber, comprising: loading the waste onto a surface of an eutectic bismuth alloy; exposing the waste to ultraviolet radiation in the 200-450 nm band; and heating the waste to a target temperature of between 100 and 300°C, wherein the eutectic bismuth alloy has a melting temperature of between 45 and 145°C.

2. The method of processing waste as claimed in claim 1 , wherein said waste is heated for one hour.

3. The method of processing waste as claimed in claim 1 , wherein said eutectic bismuth alloy is a four component Guthrie's alloy having a melting temperature of approximately 45⁰C.

4. The method of processing waste as claimed in claim 3, wherein said target temperature is approximately 100°C.

5. The method of processing waste as claimed in claim 3, wherein said target temperature is approximately 200⁰C.

6. The method of processing waste as claimed in claim 3, wherein said target temperature is approximately 300⁰C.

7. The method of processing waste as claimed in claim 1 , wherein said eutectic bismuth alloy is a four component Wood's alloy having a melting temperature of approximately 70⁰C.

8. The method of processing waste as claimed in claim 7, wherein waste comprises at least any one of wood product, peat waste, polyethylene terephthalate, potato waste, DDT and polyethylene film.

9. A waste processor for processing waste by thermal photolysis of organic compounds, comprising: a chamber having an interior cavity; an eutectic bismuth alloy located in said interior cavity for supporting said waste; an ultraviolet radiation source located in said interior cavity generating ultraviolet radiation inside said chamber in the 200-450 nm band; and a heater for heating said interior cavity to a temperature of between 100 and 300⁰C; and a control module to control said ultraviolet radiation source and said heater, wherein the eutectic bismuth alloy has melting point of between 45 and 145°C.