Beijing University of Chemical Technology Center for environmental science and engineering, and Zhejiang Xin Ball Technology Development Co. Ltd. jointly launched the new ecological carbon fiber wastewater purification technology research and development project, the day before have been identified by experts. The ecological high strength carbon fiber material of the project development, ecological carbon fiber integrated reactor and water treatment technology, can widely used in printing and dyeing wastewater, aquaculture water and urban sewage treatment plant effluent purification, and will produce good economic benefits, social benefits and environmental benefits.
"12th Five-Year" period, the national pollutant emission reduction and strengthening governance, will expand to 4 major pollutants, the chemical oxygen demand, ammonia, sulfur dioxide and nitrogen oxides. With the most strict water resources management system of China's implementation of the national sewage treatment plant will strictly enforce the emission standards mentioned standard grade A from grade B. Including chemical oxygen demand (COD), total phosphorus, total nitrogen and ammonia nitrogen in four major pollutants. The original sewage treatment plant operation process and technology will face great pressure in the face of higher quality standards, the subsequent processing technology development mentioned standard transformation, with high efficiency, low cost of materials, reduce the operation cost of the country is the common concern the sewage treatment plant. The topic of urban sewage treatment plant emission standards are standard pressure, textile and other heavily polluting industries increasingly stringent environmental requirements, freshwater aquaculture water pollution control of new technology Operation is an urgent demand. In this context, the Beijing University of Chemical Technology and Zhejiang Xin Ball Technology Development Co. Ltd. jointly developed the new ecological carbon fiber wastewater purification technology research and development project provides a new efficient purification material and low cost technology for efficient sewage treatment equipment.
Technical analysis
According to the person in charge of the project, Beijing University of Chemical Technology, the key technology of this project is the development of ecological carbon fiber new materials, this technology includes 3 aspects:
The high adsorption activated carbon fiber was prepared by using polyacrylonitrile fiber as raw material, and the specific surface area of the high adsorption activated carbon fiber was more than 1000m2/g;
The surface of carbon fiber was modified by high adsorption activated carbon fiber, and carbon fiber was treated with hydrogen peroxide and ammonia;
With active carbon fiber with high adsorption and superfine fiber composite prepared ecological carbon fiber, the ecological carbon fiber surface area, reasonable pore size distribution, adsorption and biological activity of carbon fiber with high adsorption with high affinity purification by adsorption, water not only themselves, but also can attract bacteria and the formation of biofilm adhesion activity in superfine fiber surface. These microorganisms to organic pollutants as a source of energy, through the degradation of organic pollutants in the water of the The new supersedes the old..
He told reporters, another key technology of this project is the development of ecological carbon fiber + membrane module integrated reactor. This reactor is ecological carbon fiber as filler contact oxidation reaction and membrane bioreactor (MBR) combined with integrated wastewater treatment. The water after purification adsorption ecology first carbon fiber material and its surface into MBR biological reactor. The activated carbon fiber material on the removal rate of COD is above 80%, ammonia removal rate was above 60%. The pretreatment as the membrane components of this new reactor the high adsorption capacity of carbon fiber materials used, greatly reducing the membrane fouling problem not only. The adsorption ability of self purification, and its surface biofilm formation can remove COD to a large extent, ammonia nitrogen and total phosphorus.
This integrated reactor also includes: upflow anaerobic sludge blanket (UASB) + ecological carbon fiber contact oxidation reactor and ecological carbon fiber new biological nitrogen and phosphorus removal (A2/O) integrated reactor
UASB + ecological carbon fiber contact oxidation reactor is set UASB anaerobic digestion with ecological fiber as biological contact oxidation filler in one reactor. Anaerobic digestion can remove the high concentration of macromolecular organic compounds in water, the organic matter is decomposed into inorganic and organic molecules, improve the biochemical wastewater of aerobic biological treatment, removal of most organic compounds. The ecological carbon fiber material on the removal rate of COD is above 80%, ammonia removal rate was above 60%.
Ecological carbon fiber integrated reactor model A2/O ecological carbon fiber as the aerobic reaction tank filler in anaerobic, facultative and aerobic reactor model in an integrated reactor. The removal rate of up to 80% and 70%, in addition to the COD and ammonia nitrogen, also have very good removal effect of phosphorus.
He told reporters that the new ecological fiber is used in the purification of contaminated water, excellent selection of ecological restoration of water environment, realizes the zero load on the environment and complete biological safety. The adsorption of carbon fiber and has high biocompatibility, is good microbial biofilm filler, has obvious competitive advantages in wastewater the field of biological treatment method. It has wide application prospect in freshwater aquaculture, while removing water pollutants accumulation by microbial feed such as fish and aquatic animal, senior animal eggs and rearing excellent bed space. The use of carbon fiber water governance, through the construction of forest in the water, aquatic organisms to build habitat. Gradually constructing the water ecosystem health. This material has been successfully applied in aquaculture water purification and sewage treatment, dyeing wastewater and reclaimed water purification treatment.
Case analysis
The reporter understands, this technology through the simulation demonstration test in Changchun wangjialou pan oxidation pond project lasted 1 years, the results showed that compared the new ecological carbon fiber complete purification technology and ecological technology in Japan and the United States grass Aquamats technology for water purification effect is more obvious. From cost considerations, 1gCOD needs to cut the cost of ecological packing carbon fiber is 0.92 yuan, the ecological grass carbon fiber (Japan) 2.40 yuan, Aquamats ecological base (America) for 1.54 yuan; cut 1gNH4N ecological carbon fiber packing, Aquamats ecological grass and 15.1 yuan respectively, 39.84 yuan, 47.90 yuan. 1gTP needs to cut ecological carbon fiber filler, ecological grass and Aquamats respectively. 40.48 yuan, 106.90 yuan, 108.59 yuan. So the cost is calculated with three indexes in the lowest cost cut cut costs prevail. From cost cutting, considering the treatment effect and the project investment factors, students The carbon fiber has obvious advantages
Reporters in Beijing Xiaotangshan ecological carbon fiber water purification test area of the scene, the transparency of water is much higher than the contrast with the Japanese ecological grass technology test area and America Aquamats Technology Experimental Zone. According to the local authorities and technical personnel, the new ecological carbon fiber filler can thoroughly improve the ecological environment of the river, the filler can inhibit algae large outbreaks in the process of test. They found that, when the water in the algae increased significantly when water pan oxidation pond system is still clear, shows that a large number of algae adsorption on the filler by the microbial degradation. This material has good biocompatibility, can be formed by water under the forest, fish, shrimp, shellfish like there are a lot of small packing. The surface of the aquatic animal experiment showed that appeared in the water frog, grass carp and carp, indicating that the river ecosystem restoration Vitality
The local aquaculture farmers told reporters, using the Japanese technology and technology Aquamats ecological grass ponds, water turbidity black, need to change the water regularly, and water ecological carbon fiber purification technology of fish ponds, fresh water, a long time without water.
According to experts, the ecological carbon fiber + membrane module integrated reactor and process for the best conditions of aquaculture water purification for dissolved oxygen in 5 ~ 6mg/L, put on the packing density of 0.3kg/m3 can make the water service life extended to 90 days, used in aquaculture wastewater purification, water residence time is 20 hours, reached the water back for aquaculture water standards; ecological carbon fiber UASB + contact oxidation combined reactor and process used in printing and dyeing wastewater, anaerobic hydraulic retention of 15h, biological contact oxidation tank retention time is 30h, the effluent quality reached the adsorption filtration water level dyeing industry standard; ecological carbon fiber model A2/O integrated reactor and process applied to the sewage treatment plant effluent purification, reach GB18918-2002 grade A standards.
Advantage characteristics
Experts involved in the technical appraisal of the whole set of technology has 5 characteristics and advantages:
A new type of ecological advantages of the carbon fiber, by surface modification, active strengthening, new ecological carbon fiber composite finishing system, has low production cost, strong adsorption, has good biological compatibility, ordinary activated carbon fiber in terms of cost and performance advantages can not match, so ecological carbon the fibers will occupy an important position in the field of sewage purification, which belongs to a new generation of environmentally friendly cleaning materials.
Two, the "ecological carbon fiber + membrane reactor, UASB ecological carbon fiber integrated contact oxidation reactor, the overall technical level of new A2/O integrated reactor" ecological carbon fiber in the international advanced position. Ecological carbon fiber + membrane integrated reactor for purifying aquaculture wastewater, the equipment is placed in a separate breeding pool COD, the removal rate reached 40% ~ 70%, the pool water replacement period is extended to 90 days; the new A2/O integrated reactor ecological carbon fiber used for treating sewage, the sewage treatment device, COD removal rate reached 50% ~ 80%; UASB ecological carbon fiber integrated contact oxidation reactor was used for purification of printing and dyeing wastewater, dyeing wastewater complex, poor biodegradability, can be used UASB ecological carbon fiber contact oxidation process technology for sewage purification, can reach the discharge standard of sewage of knitting dyeing and finishing industry First class standard
Three, the new sewage treatment technology of carbon fiber ecological environmental performance. Ecological carbon fiber + membrane module integrated reactor and process for purifying aquaculture wastewater, according to water quality can be realized breeding pool water purification, sewage discharge cycle extension, can realize the total discharge of sewage purification, to effect water reuse, improve water aquaculture industry, the high cost of water, with little current sewage; UASB + ecological carbon fiber combined contact oxidation reactor and process for purifying printing and dyeing wastewater, according to the quality of printing and dyeing industry to achieve a part of water, water reuse effect to solve the printing and dyeing wastewater treatment efficiency is low, treatment is difficult, the low rate of recycling; ecological carbon fiber model A2/O integrated reactor and process for purifying sewage, according to water quality, water reuse can be realized, to achieve energy saving and emission reduction.
Four, the new ecological carbon fiber wastewater treatment technology and its equipment engineering benefit. According to the water quality purifying effect of Hongyu aquiculture water status and ecological carbon fiber, the annual 2 million tons of water, change the water every 20 days, the project investment is 5 million 900 thousand yuan, the annual savings of 1 million 560 thousand tons of water using ecological carbon fiber, investment the cost of a year to recover. In five years can save 25 million 180 thousand yuan. Through the use of aquaculture wastewater treatment project, five years can save 18 million 900 thousand yuan. According to the "new" project (150 thousand days m3/) implementation plan and new ecological carbon fiber use effect, the project using the new ecological carbon fiber river water purification implementation of sewage purification 31 million 500 thousand m3 per year, project investment is 825 thousand to 1 million 650 thousand yuan. 5000t/d knitting printing and dyeing wastewater emissions in Zhejiang gold, ecological carbon fiber wastewater treatment project investment of about about 6000000 yuan, compared with the traditional Technology can save 6 million ~ 7 million yuan of funds
Five, the new ecological carbon fiber wastewater treatment technology and its equipment widely used. The research of the new type of water treatment equipment and technology can be used for aquaculture pond purification, freshwater aquaculture drainage sewage purification, wastewater purification, sewage purification, sewage and water purification, but also can be extended to chemical plant wastewater treatment etc. this new type of ecological carbon.
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