Domestic waste pyrolysis - power generating system

1. What is domestic waste?

Household garbage refers to the waste generated by people in daily life. These wastes are usually produced by people's daily Generated by living activities and consumption, including eating, cleaning, shopping, entertainment, etc. It includes various sources such as Such as waste generated in homes, offices, commercial establishments, schools and other public places.

2. Domestic waste classification

  1. Resource garbage
    Resource waste, including waste paper, waste iron, aluminum and copper containers, waste glass containers, waste plastics, waste dry batteries, waste Light tubes (bubbles), waste information products, waste electronic and electrical products and other related items. When people drop it, they need to deliver resources Recycling cart or recycling bin.
  2. Food waste
    Kitchen waste refers to raw and cooked food, residues and organic waste. Delivery garbage truck/recycling truck attached.
    Food waste recycling bins or designated food waste recycling bins are used for recycling.
  3. General garbage
    Other generally non-recyclable wastes are considered as general garbage. Pack complete garbage without exposure, and place it in a designated place.
    Click or wait for the garbage truck to appear at the designated time before discarding.

3. Related hazards

The production of household waste poses a number of hazards to the environment and human health, the following are the main relevant hazards:
  1. Environmental pollution:
    Hazardous substances and chemicals in domestic waste, if not properly treated, may cause damage to Pollution of soil, water and air. For example, chemicals in hazardous waste and e-waste contain toxic substances that can leak into the environment if not disposed of properly, threatening ecosystems and biodiversity.
  2. Waste of resources:
    Household garbage contains many recyclable and reused substances. If these substances are discarded without recycling, it will lead to waste of resources. For example, unrecycled plastic, paper, metal and glass all require a lot of energy and resources to produce, which can be conserved and have a longer lifespan through recycling.
  3. The problem of landfills:
    The large amount of domestic waste requires a large area of landfills to deal with. The use of landfills puts pressure on land resources and can also lead to contamination of soil and groundwater. In addition, greenhouse gases such as methane released during the decomposition of organic waste generated in landfills also have a negative impact on climate change.
  4. Health risks:
    Hazardous substances in some domestic wastes have potential risks to human health. For example, chemicals and medical waste in hazardous waste can release toxic fumes or cause infections. In addition, food waste that is not disposed of properly can produce unpleasant odours, attract vector organisms, and increase the risk of disease transmission.
In order to reduce these hazards, the government and all sectors of society have been promoting waste sorting, recycling and waste reduction measures. This includes measures such as encouraging people to separate waste, establishing recycling facilities, and promoting recycling to minimize environmental impact and achieve sustainable development.

4. Processing method

There are currently a variety of ways to dispose of household waste in order to reduce the impact on the environment. The following is the way of domestic waste disposal:
  1. Garbage incineration:
    Garbage incineration plants burn waste at high temperatures and generate energy at the same time. This approach reduces the volume of waste while recovering heat to generate electricity and reducing the need for landfills. The waste gas from the incineration process is discharged after treatment to reduce the impact on air quality.
  2. Garbage landfill:
    Some domestic waste cannot be recycled or incinerated, and will be transported to the landfill for burial. Landfills usually cover the waste with soil to reduce oxidative decomposition and gas emissions of waste. However, landfills use limited land resources, and greenhouse gases such as methane produced during the burial process have adverse effects on the environment and climate change.
  3. Garbage sorting and recycling:
    Encourage the public to sort and recycle garbage. Recyclables, hazardous waste and food waste Usually collected separately and transported to specialized treatment facilities. Recyclables are recycled, resources such as plastic, paper, metal and glass are recycled and reused. Hazardous waste is specially handled to avoid environmental and health hazards. Food waste is often used for biomass energy production, composting or biogas generation.
  4. Waste reduction and reuse:
    Reducing domestic waste generation is one of the important strategies. Waste generation can be effectively reduced by promoting the reduction of single-use products, promoting sustainable consumption and lifestyles, and encouraging reuse and recycling.
  5. Pyrolysis vaporization transfer into green energy & Carbon management and transfer into carbon assets:
    At present, Pulian is committed to the development of domestic waste thermal cracking and forwarding systems, and strives to achieve effective use of resources, environmental protection and sustainable development.
    The technology of pyrolysis is using the high heat to break down chemical bonds of compounds / polymers under anaerobic or low oxygen environment. After breaking down the materials, it produces molecule compounds (biomass) which is able to be scanned by chromatography. Moreover, when the biomass is heated up, bigger macromolecule will become smaller macromolecule which are coke, condensable liquid (tar oil), mixed gas and could be recycled as an important resource.
    Different reactors’ temperature and heating up speed have different results, and there are four differences below:
    1. Low temperature pyrolysis: reactor temperature around 350℃~650℃, the main purpose is for carbonization, and produce carbon and charcoal.
    2. Warm temperature pyrolysis: reactor temperature around 650℃~850℃, the main purpose is for biodiesel, produces tar and carbon black.
    3. High temperature pyrolysis: reactor temperature around 850℃~1200℃, the main purpose is for production of flammable gas, produces hydrogen, methane, CO and CO2.
    4. Super high temperature pyrolysis: reactor temperature around 1200℃, the main purpose is for totally vaporizing, produces hydrogen, methane and CO.

The technology of pyrolysis could be widely applied in waste rubber, waste plastic, sludge, mineral oil, chemical oil, industry waste oil, resin, oil paint, sludge from city, domestic wastes, organic wastes, biomass, and etc.

How to transfer into green energy:
“The white pollution” which consists of the polymer compounds which are used to produce human daily consumables/products, such as polystyrene, polypropylene, polyvinyl chloride causing the pollution. “The black pollution” which is wasted tires or rubber-made products causing environment pollution. The white pollution, black pollution, and hazardous wastes which are using incinerator to break down generate smog which produces Dioxins, causing secondary pollution. Therefore, pyrolysis is better than incinerating because it could takes care of economic and environment protection while solving the problem of secondary pollution.
There are three positive products after pyrolysis which are better green energy:
1. During the processing of pyrolysis, because of high temperature and hypoxia, the materials will break down into short-chain organic gas and low levels of hydrogen. After purifying, those materials could produce flammable gas which is able to generate and produce electric power.
2. After pyrolysis, the remaining material which is liquid tar and it could be fractionated into light oil.
3. The much pure carbon and inorganic soil are one of the best materials for building additives or clay.

According to above-mentioned, pyrolysis is a great benefit to the economy, better waste processing, and has a huge application value.

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