Urban and rural household garbage resource utilizing method

Abstract

The invention discloses an urban and rural household garbage resource utilizing method which comprises an acidification anaerobic tank, a deepening anaerobic tank, a biogas collection tank and a fuel gas generating unit, wherein a fuel gas inlet of the fuel gas generating unit is connected to the biogas collection tank through a pipeline. The method comprises a step of garbage receiving, a step of uniform material distribution, a step of primary magnetic separation, a step of primary crushing, a step of primary elutriation and flotation, a step of uniform cutting, a step of anaerobic acidification, a step of screening and separation, a step of buffering and adjustment, a step of anaerobic deepening and a step of sludge precipitation and concentration. Through the invention, the garbage does not need to be classified, the classification and screening of garbage run through the entire process of garbage utilization, and the biggest bottleneck restraining garbage treatment is overcome; and moreover, the method disclosed by the invention can realize continuous garbage treatment with an anaerobic method, and thoroughly solves the problem that the non-anaerobic garbage such as waste plastics, waste fibers and the like in the garbage cannot be recycled so that resources in the garbage are completely recovered.

Description

technical field [0001] The invention relates to a method for resource utilization of garbage to eliminate urban and rural domestic garbage. Background technique [0002] With the progress of society, sustainable development has become the goal pursued by human beings. As a product of human activities, garbage has become a burden on the earth and a serious obstacle to the development of human society. The average annual growth rate of garbage in the world is 8.42%, while the growth rate of garbage in China has reached more than 10%. The world produces 490 million tons of waste every year, and China alone produces nearly 150 million tons of municipal waste every year, and the cumulative stock of urban domestic waste in China has reached 7 billion tons. [0003] From the perspective of resource utilization, urban and rural domestic waste is mainly divided into two categories: the first type of anaerobic decomposable waste, which is composed of degradable organic matter with h...

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Problems solved by technology

[0015] 1. Regardless of the two-step fermentation method, leaching method, or anaerobic dry fermentation method, garbage classification is required before treatment. This is the biggest bottleneck restricting garbage treatment. Therefore, the above methods are not practical and the treatment costs are huge. , and the processing is not thorough, and it is impossible to promote the application on a large scale

[0016] 2. Due to the intermittent nature of anaerobic treatment, the garbage treatment capacity of the garbage treatment plant is limited, and the floor area is relatively large, which cannot adapt to the amount of garbage that should be treated in modern cities.

[0017] 3. Non-anaerobic garbage such as waste plastics and waste fibers in garbage cannot be recycled, and sorting is difficult, resulting in a great waste of resources

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