History of sewage treatment and environmental protection

Our government has always attached importance to environmental governance work, beloved Premier Zhou Enlai has put forward the "comprehensive planning, reasonable layout, comprehensive utilization, harm to benefit, relying on the masses, we do, protect the environment, benefit the people" 32 words policy, successive governments put forward the requirements of the governance of the Haihe River, three rivers and three lakes. Due to the high attention of the government from all walks of life, our country's sewage treatment cause has made great progress, but we should be keenly aware that the pace of development of industrial and agricultural production is rapid, especially the birth of the 20-year township enterprises in reform and opening up has changed the structure of our enterprises, some enterprises ignore social and environmental benefits in pursuing economic benefits, If this continues for a long time, the environment will be seriously polluted. Therefore, the control of environmental pollution can not stay in the attention of governments at all levels, but should deepen to the improvement of environmental awareness of every citizen of the whole nation. We should not only achieve economic development, improve living standards, but also achieve coordinated development of economic and environmental protection, and constantly improve the quality of life. To this end, we need to call on people to fulfill their responsibilities for the realization of the Sustainable Development Goals in the 21st century, for the survival of human health and for the environment of future generations.

The growth course of China's sewage treatment industry in the past 50 years

(1) The situation in the 1950s and 1960s

Since industrial and agricultural production had just started in the early days of liberation, the sewage pollution level was very low at that time, and the use of sewage for agricultural irrigation was advocated, especially in the water-scarce areas in northern China, and the use of sewage irrigation was promoted as an experience, such as Shenfu Irrigation Canal. Therefore, only a few cities in the country have built nearly ten sewage treatment plants (including three sewage treatment plants built by foreigners from 1921 to 1926), and some are still first-level treatment in the treatment process, and the scale of treatment is also very small, only several thousand m3 per day, and the largest is only about 50,000 m3 per day. Resulting in sewage treatment technology and management level in a relatively backward state.

(2) The development and changes in the 1970s and 1980s

With the continuous development of industrial and agricultural production and the gradual improvement of people's living standards, the composition of urban sewage has also changed, the pollution level has gradually evolved from low to high, and some developed capitalist countries have suffered painful lessons from the threat to people's health due to sewage pollution (such as the emergence of Japan's national bone pain disease and Minamata disease). Aroused people's attention and the Chinese government attaches great importance to the establishment of the national environmental protection organization (* Environmental Protection Office), the university has also set up the department of environmental engineering or environmental engineering, * Environmental protection Office invested in the construction of Tianjin sewage treatment pilot plant (Tianjin Jizhuang Zi sewage treatment pilot Plant), the construction began in the late 1970s, the scale of treatment: The primary treatment is 0.1m3 /s, the secondary treatment is 0.025m3 /s, and the Beijing Gaobeidian sewage treatment pilot Plant has also been in operation. The state and local governments are preparing for the construction of domestic large-scale sewage treatment plants to do preliminary work, at this time Tianjin Municipal government and the Ministry of Construction and relevant ministries decided to build Tianjin Jizhuang zi sewage treatment plant, and broke ground in 1982, completed and put into operation on April 28, 1984, with a processing scale of 260,000 m3/d。

The birth of Tianjin Jizhuangzi sewage treatment plant fills the gap in the construction of large-scale sewage treatment plants in our country, and has aroused great attention from the government.  Ji Zhuangzi sewage treatment plant has been put into operation for many years to meet the design of effluent water quality standards, so that the black and smelly sewage into clear flow, which has been praised by the members of the committee, and through them to the governments across the country to accelerate the pace of construction of sewage treatment plants, the development of sewage treatment business, and the elimination of sewage pollution to the environment. Because Jizhuangzi sewage treatment plant is the largest urban sewage treatment plant in China, it has also aroused the great attention of various provinces and cities, and they have led teams to visit the plant, and their arrival will bring the seeds of sewage treatment to the motherland to blossom and bear fruit. Under their decision, Beijing, Shanghai, Guangdong, Guangxi, Shaanxi, Shanxi, Hebei, Jiangsu, Zhejiang, Hubei, Hunan and other provinces and cities have built sewage treatment plants of different sizes according to their specific conditions, so that China's sewage treatment plants have developed from a dozen in the 1960s to dozens.