Main sewage treatment technology used at the present stage
Six.. Application prospect
1,Main sewage treatment technology used at the present stage
Up until now, the domestic and foreign and current municipal sewage treatment process is (intensified) for second Biochemical treatment process, employ the most extensive one to be activated sludge process and evolve technology. Adopt the activated sludge process to handle municipal sewage and industrial waste water and already have long history abroad, this craft came out from Manchester, Britain since 1914, went through a century so far. The technology of activated sludge process is to contain a large number of sewages which dissolve the organic matter, after some time, underwater to form the biological flocculating constituent promptly - -Activated sludge, a large number of microbes perch, live on the activated sludge, this kind of microbe regards organic matter of dissolubility as the food, obtains energy, and is increasing and breeding constantly, by metabolism of the microbe, change the organic pollution into a harmless gaseous product ( CO2) , liquid the product ' Water) And rich solid product of thing of containing etc. ' Micropopulation or biological sludge) ; Separate through the solid and liquid phase finally, realize the biological sludge and aqueous effective segregation of purification, because the activated sludge process has very high chemical conversion efficiency, it is very effective to abolish the underwater pollutant disposal included to municipal sewage and organic industry, thus become long technology.
2,Current situation of the development of corrupt waste water treatment trade of our country
The corrupt waste water treatment trade of our country has obtained and grown vigorously since reform and opening-up. In middle period of the eighties, the country advanced the comprehensive environmental renovation of the city, the construction of the municipal sewage plant was strengthened. " the the Ninth Five-Year Plan " Since, the country, to the pollution most severe " three river three lakes (Huaihe River, Haihe River, Liaohe River, Tai Hu, Chaohu, Dian Chi) Manage especially, the increase in investment of sewage disposal is being accelerated constantly, the engineering construction of treatment of municipal sewage enters fast developing stage. And development after decades of construction, the treatment of municipal sewage of our country has already had certain scale and level for the first time. Build up 1529 urban sewage treatment plants together in the whole country by the end of 2008, daily handling ability reaches 8, 8,360,000 tons, urban sewage handling rate of the whole country is up to 66%, the quantity and handling capacity of the sewage treatment plant are 41 times those of 1978 and 138 times respectively.
3,Development prospect of the sewage disposal trade of our country
Measure is put forward and promotion is implemented as the sign by strategy of national " energy-conserving emission reduction ", sewage disposal of our country and regenerating to utilize construction of facilities to develop more rapidly, according to the country " 11 five " relevant planning, the handling rate of municipal sewage of our country will be lower than 70% in 2010, than " 15 " the end improve again 18 pieces of percentage point, improve 3.6 percentage point every year, the whole country newly-increased the intersection of municipal sewage and daily handling ability reach 4, unless 5 million tons, whose name is regenerated water day utilize 6,800,000 tons of ability,municipal sewage daily handling ability in " 15 " improve by 78.6% newly on the base figure of the great of the end. For this reason, are used for in the treatment of municipal sewage and investment of regeneration being be up to 3, 32 billion yuan, than " 15 " Period increases by 108.18%.
4,The sewage particle grinds and endures the rice catalyst (the treatment technology of reaction that physical chemistry autoignites) Show the advantage
The sewage particle grinds and endures the rice catalyst (the treatment technology of reaction that physical chemistry autoignites) Technology is to deal with the sewage the aqueous new advanced technology of high-quality regeneration putting, recognized as one of the efficient sewage disposal and technology of recycle treatment in the most forward position in our times, it is one of the most valid tools which realizes separation of solid and liquid phase, purification. Selectivity and efficiency which it has, have realized that removes the high limit of harmful substance in the sewage, have pollutant remove with high efficiency, floor space little and operation management help and cost low grade show the advantage. Its become municipal sewage and the intersection of industrial wastewater treatment and the intersection of recycling and the intersection of field and most attractive and technology of competitiveness already, considered to be the technical critical technology of water treatment of the 21st century, it is to substitute the technological best choice of the tradition, the sewage particle grinds and endures the rice catalyst (the treatment technology of reaction that physical chemistry autoignites) Technology is that the dirty waste water purifies the first-selected technology that filters deeply.
5,The sewage particle grinds and endures the rice catalyst (the treatment technology of reaction that physical chemistry autoignites) Technical application prospect
The sewage recycle treatment field is that the sewage particle grinds and endures the rice catalyst (the treatment technology of reaction that physical chemistry autoignites) The most direct enormous potential market of technology, direct against the national conditions of serious shortage and water pollution of water resource of our country with severe situation, demand urgently to advance the recycle treatment process of sewage, it is a current requirement for the sustainable development that regenerated water conservancy is used. According to the analysis of a environmental planning institute of country's environmental protection, State Information Center, the total amount of water using of our country was up to 567 billion / m3 in 2006, occupied the first place in the world, in cases industry kept the normal dropping speed with the agricultural water intensity, reach water consumptions national at 2020 year crest value, last 6, 830 hundred million / m3 total amount, increase by 17.8% than that of 2006, it is it is last 50 billion - 70 billion / m3 to lack by water amount not to it is estimated, in a situation that the existing waste water treatment level improves normally, the waste water discharge amount of our country will reach 169,700 million tons in 2020. Increase by about 30% compared with 2006, for the tense problem with severe water pollution of solving water using at all, need to launch regenerated water conservancy and using the project, strengthen and circulate water conservancy to use, thus grind and endure the rice catalyst (the treatment technology of reaction that physical chemistry autoignites) for the sewage particle Deal with technical application and popularize and bring the most direct enormous potential market
Because environmental consciousness sprouts gradually, also need building the sewage treatment system in the city of next generation badly in the future. Especially Chinese market, according to the estimating of European Union, only from 2006 to 2010, the market of the sewage treatment system in the city is up to 330 billion yuan promptly, in the following ten years, if the manufacturer can get 5% of the accounting for rate of market in China, there can be business opportunity of more than 20,700 million yuan. Because of 661 cities in China, 400 have a short water question, so for Chinese Government, it is not enough to only accord with standards discharged, they need more one back to water using, also their regulation is more rigorous, hope to reuse with the aqueous recovery, save more water resources, has formed bulky market interests too.