What is the discharge of three wastes, and the discharge standard of three wastes is brief

"Industrial three wastes" refers to the "waste water, waste residue and waste gas" emitted by industrial production.

The three wastes are the general term for waste gas, waste water, and solid waste. . . Needless to say

The significance of three waste treatments: the use of them can also improve environmental sanitation; Standards for the treatment of three wastes: Trial standards for industrial "three wastes" discharge.

China's regulations on the allowable discharge and concentration of waste gas, waste water and waste residue discharged from industrial pollution sources (hereinafter referred to as the "three wastes") are divided into 4 chapters and 19 articles. The general provisions require all regions to formulate regional industrial "three wastes" emission standards in accordance with the principles of this standard. The "Trial Standard for the Discharge of Industrial "Three Wastes" was promulgated in 1973 and implemented on a trial basis in January 1974.

This standard was developed under the auspices of the Office of the Preparatory Group for China's First Environmental Protection Conference. The principle of formulation is to adopt the "Hygienic Standards for the Design of Industrial Enterprises.

Based on the first example, with reference to the emission standards of various countries in the world, combined with the actual situation of the country, we strive to prevent hazards and be technically feasible.

Waste removal method. Some ways to deal with the three wastes in chemical experiments:

1. Treatment of exhaust gas.

Experiments that produce a small amount of toxic gas should be carried out in a fume hood, and a small amount of toxic gas should be discharged to the outside through exhaust equipment, and the experiment of diluting a large amount of toxic gas by air must have an absorption or treatment device. such as nitrogen oxides.

Acid gases such as sulfur dioxide are absorbed by lye, and flammable organic waste liquid can be passed through the combustion furnace.

Oxygen burns completely.

2. Disposal of waste liquid.

Each laboratory should be equipped with containers for storing waste residue and waste liquid, and the waste residue and waste liquid that pollute the environment generated by the experiment should be classified and poured into designated containers for storage. Acidic and alkaline waste liquids according to their chemical properties.

Neutralization and post-processing are carried out separately. Discharge after reaching pH between 6 and 9.

The organic waste liquid is concentrated and treated with the first lack of shed, conversion, and combustion. Try not to use chemical reagents containing heavy metals for experiments.

3. Destruction of waste materials.

Toxic wastes that can be naturally degraded are buried and treated in a centralized and deep manner. Waste chemicals that are insoluble in water are not allowed to be thrown into the wastewater pipeline, and must be concentrated in an incinerator or chemically treated into harmless substances. Broken glass and other sharp scraps with edges and corners should not be disposed of in the waste paper basket and should be collected in special waste bins for disposal.

The three wastes are generally generated by industrial pollution sourcesWastewater, exhaust gases and solid waste。China has become a major tannery country in the world, and waste water, waste residue and waste gas are increasing day by day. If tannery waste is not treated, it will endanger the life and health of animals, plants and humans.

In particular, chromium pollution, sulfur pollution, salt pollution and other fatal pollution sources in the three wastes of tanning are the fatal pollution sources of the tanning industry, although there is a good pollution control system, but there are still some problems in these systems, such as incomplete pollution control, causing secondary pollution, etc. Therefore, we must attach great importance to it, and we must use high-tech means to comprehensively treat and utilize the three wastes, purify the living environment, and protect the ecological balance.

A general term for waste gas, waste water, and solid waste. It can also be referred to as raw materials that have been placed in the wrong place. It can also improve environmental hygiene.

China's discharge and treatment of the three wastes are availablestandardswithprovisions

Radioactive wasteTreatment and disposal: In the process of nuclear industrial production and nuclear scientific research, some solid, liquid and gaseous wastes with different degrees of radioactivity will be generated, referred to as the three wastes.

The three wastes are distinguished from different situations and multi-level is adoptedPurification, decontamination, compression, volume reduction, incineration, solidificationand other measures to deal with and dispose of. This process is called three wastes treatment and disposal.

For example, radioactive waste liquid can be divided into low, medium and high discharge waste liquid according to its radioactive level, which can be purified and cured by cement or asphalt and vitrification. After solidification, it is stored in a dedicated disposal site or in a deep stratum repository to isolate it from the biosphere.

The scrapping time of the China III emission standard is 15 years. According to the relevant regulations of our country, there is no limit on the scrapping life of private cars, but the mandatory scrapping life of trucks is stipulated to be up to 15 years.

Mandatory Scrapping Standards for Motor Vehicles

Article 5. The service life of each type of motor vehicle is as follows:

8 years for small and micro taxi passenger cars, 10 years for medium-sized taxi passenger cars, and 12 years for large taxi passenger cars;

2) Lease passenger vehicles for 15 years;

3) 10 years for small coach passenger cars, 12 years for medium coach passenger cars, and 15 years for large coach passenger cars;

4) The bus passenger car makes Lu Xuan use for 13 years;

5) 10 years for other small and micro passenger vehicles, and 15 years for large and medium-sized passenger vehicles;

6) Special school buses are used for 15 years.