In today's information society, with the rapid development of the electronics industry, the use of various types of electronic products is increasing, and with the continuous upgrading of products, more and more electronic waste has become the cause of the natural environment. One of the important factors of deterioration has already attracted the attention of governments in various countries. Therefore, research on the recycling of e-waste is particularly important in the current situation.

Electronic waste profile

Electronic solid waste (including used mobile phones, computers, televisions, air conditioners, refrigerators, printers, copiers, digital video cameras, digital cameras, VCDs, DVDs, audio equipment, etc., as well as semi-finished products, raw materials, etc. produced during the production of such products) The issue of resource utilization is an important issue related to China's environmental improvement and the realization of the sustainable development strategy of the environment and economy. At the same time, it is still a big problem that currently plagues the global environment. Especially in developed countries, due to the rapid replacement of electronic products, the production of electronic solid waste is faster and more.

According to statistics, Germany produces 1.8 million tons of electronic solid waste annually, 1.5 million tons in France, and about 6 million tons in Europe. The United States has 2 to 7.5 million tons, of which only 50 million computers have been eliminated and 130 million mobile phones. At least 5 million TV sets, 4 million refrigerators and 6 million washing machines are scrapped every year in China. The total amount of electronic solid waste is 28 to 30 million. Experts predict that in 2006, Beijing will produce 115,200 tons of electronic solid waste, including 3.57 million TV sets, refrigerators, washing machines, air conditioners, computers and 2.345 million mobile phones. Shanghai will generate more than 100,000 tons of electronic solid waste, including 250,000 TV sets and 200,000 washing machines.

According to the China Environmental Bulletin: In 2003, the amount of solid waste generated in China was about 1 billion tons, and the emissions were about 19.41 million tons. The discharge of hazardous waste was about 11.71 million tons. The comprehensive utilization rate of industrial solid waste is only 54.8%. In 2003, the area of ​​soil contaminated by heavy metals in China reached 20 million hectares (200 billion square meters.) In 2005, the amount of solid waste generated in China was about 119.62 million tons, and the emissions were about 21.2 million tons; hazardous waste emissions are about 50.98 million tons.

The social benefits of solid waste recycling in China

According to the statistics of public welfare and environmental protection, the six types of recyclable waste generated in China each year are:

1. 43 million tons of scrap steel, worth about 77.4 billion yuan; 2. 12,000 tons of waste non-ferrous metals, worth about 0.28 billion yuan; 3. 920,000 tons of waste rubber, worth about 1.1 billion yuan; 4. 2.5 million tons of waste plastics , valued at about 3 billion yuan; 5. Waste glass 10.4 million tons, worth about 312 million yuan; 6. waste paper 15 million tons, worth about 750 million yuan;

If the above solid waste is processed by deep processing, its value can be doubled. For example, using one ton of waste plastic to process it into recycled granules can increase the efficiency from 1,200 yuan/ton to 3,500 yuan/ton; using one ton of waste glass to reheat, it can produce 20,000 bottles of 500 gram bottles. The new raw material production saves 20% of the cost, can save 720 kg of quartz sand, 250 kg of soda ash, save 60 kg of feldspar powder, save 10 tons of coal and 400 degrees of electricity.

Floor Drains

Do I need a floor waste?

Generally speaking a floor waste is optional, however if you're planning on installing an open shower or a shower bath that isn't fully enclosed, you will be required to have a floor waste installed. An enclosed shower where water from the shower is contained to a small amount of space may not require a floor waste.

How many floor drains are required?

Any building or structure in which plumbing fixtures or piping is installed in or under a concrete floor to accommodate fixtures on the level of the concrete floor shall have at least one trapped and vented floor drain.

Where is floor drain required?

According to building codes, a floor drain in the basement is required to safely drain unwanted or excess water from a home. Typically, a floor drain will connect to the local sewer system or link to a collection pit where the wastewater can be carried away.

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