Why Use Pyrolysis to MSW Treatment?

The main difference between the pyrolysis, gasification and incineration: the amount of oxygen that is supplied to thermal reactors. Pyrolysis has advantages in producing gas or oil products from waste that can be used as fuel for its process of pyrolysis.

Quantitatively differences between the pyrolysis, gasification and combustion: based on the needs of the air needed during the process, i.e. as follows
-If the amount of air: fuel (AFR, air-fuel ratio) = 0, then the process is called pyrolysis.
-If the AFR <1.5 then the process is called gasification.
-If the AFR> 1.5 then it is called the combustion process

Pyrolysis have a number of advantages are as follows:
-Lower temperature process (400-800 C) so the smaller the investment costs
-Flue-gas emissions below the required threshold.
-All the pyrolysis products have economic value.So that the sustainability of MSW processing is not only dependent on the tipping fee, but rather on the sale of the pyrolysis products.

-Pyrolysis can adjust to the type of feedstock such as pyrolysis of plastic will result in major product syn crude oil, pyrolysis of scrap tires will be produced also syn crude oil, carbon black and syn gas, and so other feedstock. The use according to type of feedstock will increase the economic value of the resulting product significantly. In process aspects this will be considered against the availability of feedstock and selling value of products produced.

Institute of Applied Energy (Tokyo) published in 2004 an analysis of stoker incinerator and pyrolysis plants operating under the same conditions. The analysis revealed that a conventional stoker grate incinerator with a steam turbine has no performance advantage over a pyrolysis plant at any scale.

Temperature Effect in Pyrolysis Process Of Charcoal Quality

Pyrolysis produces biochar, liquids and gases from biomass by heating the biomass in a low/no oxygen environment. The absence of oxygen prevents combustion. The relative yield of products from pyrolysis varies with temperature. Temperatures of 400–500 °C (752–932 °F) produce more char, while temperatures above 700 °C (1,292 °F) favor the yield of liquid and gas fuel components. Pyrolysis occurs more quickly at the higher temperatures, typically requiring seconds instead of hours. Pyrolysis also may be the most cost-effective way of producing electrical energy from biomaterial. Syngas can be burned directly, used as a fuel for gas engines and gas turbines, converted to clean diesel fuel through the Fischer–Tropsch process or potentially used in the production of methanol and hydrogen. Varying process conditions result in differences in product charcoal, gas or oil produced. Pyrolysis has advantages in producing gas or oil products from waste that can be used as fuel for the pyrolysis process itself.

Effect of carbonisation temperature on yield and composition of charcoal

Low carbonization temperatures give a higher yield of charcoal but this charcoal is low grade, is corrosive due to its content of acidic tars, and does not burn with a clean smoke-free flame. Good commercial charcoal should have a fixed carbon content of about 75% and this calls for a final carbonising temperature of around 500°C.

The yield of charcoal also shows some variation with the kind of wood or biomass. For wood there is evidence that the lignin content of the wood has a positive effect on charcoal yield. A high lignin content gives a high yield of charcoal. Therefore, mature wood in sound condition is preferred for charcoal production. Dense wood also tends to give a dense, strong charcoal, which is also desirable. However, very dense woods sometimes produce a friable charcoal because the wood tends to shatter during carbonization. The friability of charcoal increases as carbonization temperature increases and the fixed carbon content increases as the volatile matter content falls. A temperature of 450 to 500°C gives an optimum balance between friability and the desire for a high fixed carbon content.

Eco-friendly Farming with Biochar

Biochar can add moisture and fertility of agricultural land and can exist thousands of years in the ground when used for the reduction of CO2 emissions. Global warming due to increased emissions of CO2 and other greenhouse gases have seized the attention of the world lately. Along with global warming, climate change also occurs, which supported the frequency of climate anomalies such as El Nino causes droughts or La-Nina who encouraged the occurrence of floods.

Reforestation and afforestation efforts to reduce the CO2 content of the air could not be expected to reduce the impact of the global climate. The binding of carbon (carbon sequestration) of agricultural land through the improvement of management practices is one of the main options to reduce emissions of CO2 into the atmosphere. Increased carbon content in soil with the use of ground cover plants, adding mulch, compost or manure managed to improve the productivity of the soil, nutrient supply to the plants, contributing to rapid nutrient cycles, and hold the mineral fertilizer provided. However, the short-term nature of especially in the tropics, because the process of decomposition takes place quickly that organic materials undergo decomposition and mineralization into CO2 within just a few seasons. Therefore the addition of organic matter to be made each year to sustain soil productivity.

Black carbon (C), referred to as biochar, can overcome some limitations in carbon management. The fact that there is, and a variety of research results, pointed out that biochar may add moisture and fertility of agricultural land. In addition, in the context of the reduction of CO2 emissions in the land of ' biochar ' persistent even reported to thousands of years.

Increasing the motivation of the public against the use of organic agricultural ingredients makes the discussion and evaluation of biochar become nore relevant, both as a commodity economy and as a multi-use soil amendment. In soil, biochar provides good habitat for microbes, but not consumed like other organic materials. In the long term ' biochar ' doesn't interfere carbon-nitrogen balance, even able to hold water and nutrients and made more available to plants.

Application of biochar into the soil is new and unique approach to making a container (sink) for atmospheric CO2 in terrestrial ecosystems long term. In the making process, about 50% of the carbon in the raw material will be contained in biochar, then the biological decomposition of biochar, usually less than 20% after 5-10 years.

In addition to reducing emissions and increasing the binding of a greenhouse gas, soil fertility and crop production can also be improved. The two main potential biochar for agriculture is a high affinity of nutrient elements and its endurance. Biochar is more endurance in soils, so all the benefits associated with nutrient retention and soil fertility can run longer than any other organic material normally given.

The endurance of biochar become best choice for reducing the impacts of climate change. Although it can be a source of alternative energy, the benefits of biochar is much greater if it is immersed into the ground in realizing environment-friendly agriculture.

The base material used will affect the properties of biochar itself and have different effects on the productivity of the soil and plants. Raw material production of biochar are mostly agricultural or forestry biomass residues, including pieces of wood, coconut shell, empty fruit bunches, cob corn & rice husks or skin fruit nuts, bark-bast, remnants of a logging business, as well as the organic material the other remakes. Integration of bioenergy production, sustainable agriculture and waste management into an approach in the use of biochar; It is a synergistic effort management and integrated.

The addition of biochar to soil increases availability of major cations and posfor, a total of N and soil cation exchange capacity and finally improving the results. The high availability of nutrient for plants was the result of the increased nutrients directly from the biochar, increased nutrient retention, and change the dynamics of soil microbes. Long-term gains for the availability of nutrients is related to the organic carbon stabilization higher along with the release of nutrient slower than organic material is used.

The role of biochar to the increasing productivity of crops affected by the amount added. Dosage of 0.4 to 8 t C ha-1 was reported to be significantly increases the productivity of between 20-220%. As a simple picture, the production of 50 million tons of grain annually participated generated about 60 million tons is "waste" (straw and rice husks) that can be processed into biochar.

Reforestation and afforestation efforts to reduce the CO2 content of the air could not be expected to reduce the impact of the global climate. The binding of carbon (carbon sequestration) of agricultural land through the improvement of management practices is one of the main options to reduce emissions of CO2 into the atmosphere. Increased carbon content in soil with the use of ground cover plants, adding mulch, compost or manure managed to improve the productivity of the soil, nutrient supply to the plants, contributing to rapid nutrient cycles, and hold the mineral fertilizer provided. However, the short-term nature of especially in the tropics, because the process of decomposition takes place quickly that organic materials undergo decomposition and mineralization into CO2 within just a few seasons. Therefore the addition of organic matter to be made each year to sustain soil productivity.

Black carbon (C), referred to as biochar, can overcome some limitations in carbon management. The fact that there is, and a variety of research results, pointed out that biochar may add moisture and fertility of agricultural land. In addition, in the context of the reduction of CO2 emissions in the land of ' biochar ' persistent even reported to thousands of years.

Increasing the motivation of the public against the use of organic agricultural ingredients makes the discussion and evaluation of biochar become nore relevant, both as a commodity economy and as a multi-use soil amendment. In soil, biochar provides good habitat for microbes, but not consumed like other organic materials. In the long term ' biochar ' doesn't interfere carbon-nitrogen balance, even able to hold water and nutrients and made more available to plants.

Application of biochar into the soil is new and unique approach to making a container (sink) for atmospheric CO2 in terrestrial ecosystems long term. In the making process, about 50% of the carbon in the raw material will be contained in biochar, then the biological decomposition of biochar, usually less than 20% after 5-10 years.

In addition to reducing emissions and increasing the binding of a greenhouse gas, soil fertility and crop production can also be improved. The two main potential biochar for agriculture is a high affinity of nutrient elements and its endurance. Biochar is more endurance in soils, so all the benefits associated with nutrient retention and soil fertility can run longer than any other organic material normally given.

The endurance of biochar become best choice for reducing the impacts of climate change. Although it can be a source of alternative energy, the benefits of biochar is much greater if it is immersed into the ground in realizing environment-friendly agriculture.

The base material used will affect the properties of biochar itself and have different effects on the productivity of the soil and plants. Raw material production of biochar are mostly agricultural or forestry biomass residues, including pieces of wood, coconut shell, empty fruit bunches, cob corn & rice husks or skin fruit nuts, bark-bast, remnants of a logging business, as well as the organic material the other remakes. Integration of bioenergy production, sustainable agriculture and waste management into an approach in the use of biochar; It is a synergistic effort management and integrated.

The addition of biochar to soil increases availability of major cations and posfor, a total of N and soil cation exchange capacity and finally improving the results. The high availability of nutrient for plants was the result of the increased nutrients directly from the biochar, increased nutrient retention, and change the dynamics of soil microbes. Long-term gains for the availability of nutrients is related to the organic carbon stabilization higher along with the release of nutrient slower than organic material is used.

The role of biochar to the increasing productivity of crops affected by the amount added. Dosage of 0.4 to 8 t C ha-1 was reported to be significantly increases the productivity of between 20-220%. As a simple picture, the production of 50 million tons of grain annually participated generated about 60 million tons is "waste" (straw and rice husks) that can be processed into biochar.