Introduction of environmental protection materials

1, the professional data of environmental protection can be divided into ecological environmental protection data, wastewater treatment data, waste gas treatment data, noise treatment data, solid waste treatment data, environmental impact assessment data and cleaner production data according to professional technology; According to the needs of users, it can be divided into environmental protection laws and regulations, environmental protection standards and norms, and environmental protection review materials; Information can be divided into environmental protection equipment manufacturer information, environmental protection exhibition exchange information, environmental protection recruitment and job hunting information, environmental protection bidding information and so on.

2. On April 22nd, 1970, dennis hayes, a student of Harvard University in the United States, initiated and organized environmental protection activities, which received enthusiastic response from environmental protection organizations. About 20 million people from all over the United States took part in this massive demonstration and rally, aiming to arouse people's awareness of environmental protection and urge the US government to take some measures to control environmental pollution. Later, this activity was approved by the United Nations. Up to now, April 22nd every year has been designated as "Earth Day".

3. Wastewater treatment: The wastewater treatment method is to treat wastewater through physical, chemical and biological methods to achieve the purpose of purifying wastewater, reducing pollution, recycling wastewater and making full use of water resources.

4. Waste gas treatment: Waste gas treatment is also called waste gas purification. Waste gas treatment refers to the pretreatment of waste gas produced in industrial sites and factory workshops before discharge, so that it meets the national waste gas discharge standards. General waste gas treatment includes organic waste gas treatment, dust waste gas treatment, acid-base waste gas treatment, malodorous waste gas treatment and air disinfection and purification.