What is the current situation of household waste classification and collection in China?
Answer: Currently, most cities in China still use mixed collection for household waste. Generally, it refers to residential areas, garbage rooms, garbage transfer stations, and garbage treatment plants.
In April 2000, the Ministry of Construction selected 8 cities including Beijing, Shanghai, Guangzhou, Nanjing, Shenzhen, Hangzhou, Xiamen, and Guilin as pilot cities for garbage classification and collection. However, limited by factors and conditions such as transportation, disposal methods, and technological means of urban household waste, the process of classified collection of household waste in most cities in China, especially small and medium-sized cities, is still in a state of mixed collection and mixed treatment, which has brought huge economic burden to local governments.
2. Where is the application of household waste sorting technology in household waste treatment?
Answer: In response to the current situation of mixed packaging, collection, and complex composition of urban household waste in China, in order to achieve the reduction, resource utilization, and harmlessness of urban and rural household waste, the waste sorting and treatment process is an indispensable and important process in the comprehensive treatment of domestic waste. From the perspective of comprehensive treatment, selecting a reasonable urban household waste sorting process route to improve its effectiveness and efficiency, simplifying the subsequent treatment process route, and reducing investment and operating costs are the most important aspects.
What is the bulk density of household waste?
Answer: The bulk density of garbage refers to the weight per unit volume of garbage, also known as the pile density, expressed in kilograms per liter or tons per cubic meter. Bulk density of garbage is one of the important characteristic values of garbage, which varies with the composition and compaction degree of garbage. The bulk density of garbage varies greatly depending on the location (such as urban and rural areas, southern and northern regions), and is generally calculated at 0.3t/m3.
What are the necessary conditions for selecting a garbage sorting technology solution in the early stage?
Answer: 1. [Garbage component determination and sorting process] Data query: The capacity of domestic waste in major cities in China is 370-898kg/m3, with Jinan having the lowest and Shanghai having the highest. The moisture content ranges from 13% to 53.9%, with Jinan having the lowest and Beijing having the highest. So, choosing a garbage sorting scheme based on the composition of garbage is the foundation for designing a successful garbage sorting scheme.
2. The subsequent processing method determines the sorting process. Due to the different living standards in urban and rural areas, the composition of their household waste is also different, and the different levels of economic development also determine the different methods of household waste treatment. When determining the sorting process and equipment, it should be adapted to local conditions and flexibly applied.
