- The main application of super absorbent polymer
- Correct selection method of polyacrylamide for mineral processing
- What is the degree of hydrolysis and ionic degree of polyacrylamide?
- What factors are related to the amount of polyacrylamide?
- Effect and distinction of polyacrylamide and decolorizing agent
- Causes and solutions of sludge whitening in sewage
- Application of polyacrylamide in the whole process of oil recovery
- Characteristics and application range of instant polyacrylamide
- Spray drying polyaluminum chloride -- Chinafloc-PAC
- Sludge dewatering process of polyacrylamide
Simple analysis of polyacrylamide and water treatment industry
At present, the proportion of wastewater discharge and treatment in our country is serious, and the water resource problem is increasingly serious. It also explains the huge space of development of water treatment industry.
At present, China's annual wastewater emissions of about 365 tons, the annual processing capacity of only 100 tons, the treatment rate is less than 1/3. The current water treatment market in the world, including inorganic flocculant polyferric chloride, has a market share of more than 3/4. Although China's water treatment agent industry has already had a certain scale and level, but still can not meet the requirements of a large number of industrial wastewater and civil water treatment, compared with foreign advanced level there is no small gap. Industry is expected in the next few years the production of domestic water treatment agent will have a rapid development, the annual demand will reach 300000 tons, of which the amount of flocculant is 180000 tons.
The United Nations has issued an alert on the shortage of freshwater resources: "the problem of water shortage will seriously restrict the economic and social development in the next century, and may lead to conflicts between countries". The report, entitled "comprehensive assessment of the world's freshwater resources," said the current population of more than 1200000000 people in the world, that is, people are facing the pressure of a high degree of water shortage ". The report also predicts that by 2025, the world population will surge to 8300000000, the world will have a 1/3 population suffer from a high degree of water shortage pressure".
In January 20, 1997, the United Nations issued an alert: "water shortage problem will seriously restrict the economic and social development in the next century, and may lead to conflicts between countries". The report, entitled "comprehensive assessment of the world's freshwater resources," said the current population of more than 1200000000 people in the world, that is, people are facing the pressure of a high degree of water shortage ". The report also predicts that by 2025, the world population will surge to 8300000000, the world will have a 1/3 population suffer from a high degree of water shortage pressure".
With the development of industry and the rapid growth of population, the shortage of fresh water has caused widespread concern in the world. China's water resources in the world, but the per capita amount of water is only 1/4 of the world's per capita water, 109, and the time and space distribution of fresh water resources and uneven distribution of the population, social development is uneven, resulting in serious shortage of freshwater resources in some cities. At present, there are more than 300 cities in the country, more than 50 cities in serious water shortage. Shortage of fresh water resources has seriously affected the lives of people and economic development in these areas, causing direct economic losses of hundreds of billions of dollars a year.
Into twenty-first Century, China's population continues to grow, will reach 1600000000 peak, the development of soil resources will reach the critical state, the water demand will further increase. 1993 national industrial and agricultural production and urban and rural residents living water has reached 525000000000 m3, per capita water consumption 450m3. According to population growth, industrial and agricultural production and development, such as not to save water, the initial estimate in 2030 to increase the supply of 2000 ~ 250000000000 M3 to meet the needs of all aspects of. Three Yellow River, Huai River, Hai River basin after 2010, with the increase in population, per capita water resources will be less than 400m3, local water has no potential to be tapped, the water only long distance from the Yangtze River water transfer to is solved. The long distance water transfer costs, investment, financing difficulties, and also by social and environmental constraints, the implementation of the project is very difficult. Therefore, the first need to use a variety of high-tech, by saving water, using rainwater, sewage treatment reuse, water use and other ways, do everything possible to improve the efficiency of agricultural and agricultural water.
With the rapid development of industrial and agricultural production and the improvement of people's living standards, the demand for water is increasing. At the same time, water pollution is becoming increasingly serious. China is one of the countries with poor water resources, the per capita amount of water per capita is only 1/4, and there are more than 300 cities in China at present, and the daily water shortage is about 10000000 cubic meters, which seriously affects domestic industrial production and people's life. Industrial water consumption is generally accounted for 70%-80% of urban water, water consumption, reasonable treatment by all walks of life are generally concerned, the demand for water treatment agent is also increasing. Polymerization ferric chloride and polymeric aluminum chloride, polyacrylamide, aluminum salt with floc formation speed, alum flowers dense, settlement speed, good treatment effect for high and low turbidity raw water, suitable pH value of a wide range of characteristics, but also removal of organics, suspended solids, heavy metals, sulfides and carcinogens, free iron ions in the aqueous phase shift, decolorization, oil removal, deodorization, sterilization function significantly and cheap price, compared with other purifying agent, a strong market competitiveness and the economic benefit is also very obvious, it is worth popularizing and applying.