articles/chen caixia
on april 20, 2019, the upflow filter technology exchange conference led by shenzhen qingquan water industry co., ltd. (hereinafter referred to as "shenzhen qingquan") was solemnly held in shantou branch of central south municipal college. peng gong, assistant of qingquan general labor office in shenzhen, was the speaker of the conference. mr. ye changming, chairman of the board of directors, attended the meeting as an expert in technology research and development. he and field experts discussed the technical application of upflow denitrification deep bed filter in depth.
shenzhen qingquan at the technical exchange meeting of shantou branch of zhongnan academy
at 10:00 a.m., the exchange meeting officially began. the experts present at shantou branch of zhongnan academy warmly welcomed the arrival of qingquan in shenzhen.
before the report was officially started, peng gong analyzed the common methods of sewage treatment upgrading and capacity expansion, such as coagulation sedimentation tank filter, high efficiency sedimentation tank denitrification filter, aao mbr membrane technology, mbbr advanced treatment, and introduced the characteristics of these processes and the treated effluent quality. how should sewage treatment plants respond to the inevitable total nitrogen increase? shenzhen qingquan offers a practical solution.
technical exchange site
next, peng gong elaborated on the technical application of upflow denitrification deep bed filter. upward flow filter is used to filter. suspended flocs deposit downward under gravity and adhere to the surface of filter material particles. the whole filter bed has a strong filtering capacity, and the amount of pollutants received is more than five times that of downward flow filter. through the demonstration of words and pictures, the differences of the structure, distribution of water and air, backwashing method, liquid level and dissolved oxygen control parameters between the upflow denitrification deep bed filter and the downflow filter are analyzed. it is not difficult to conclude that the upflow denitrification deep bed filter has the following characteristics:
1. when the denitrification and filtration processes are completed in a single tank, ss (> 50%), tn (> 80%) and tp (> 50%) can be removed simultaneously.
2. the filter speed is 6-9m/h faster and the area is small.
3. it has stronger ability to absorb pollutants, 15-25 kg/m, so that the backwashing cycle is longer, 24-72 hours.
4. simple structure, automatic control;
5. the effluent quality can reach: tn < 3 mg/l, ntu < 2, ss < 5 mg/l, tp < 0.2 mg/l.
6. no nitrogen displacement device is needed.
7. without water dropping, dissolved oxygen can be increased, and the amount of carbon can be saved by 20-30%.
peng gong, qingquan, shenzhen, explains the technical application of upflow denitrification deep bed filter
finally, peng gong enumerated the application cases of up-flow denitrification deep bed filter in qingquan company, such as the bid-raising project of shenzhen gushi sewage treatment plant in guangdong province, the bid-raising and upgrading project of meishan sewage treatment plant in sichuan province, and the national "ninth five-year" project demonstration project of jiuquan sewage treatment plant in gansu province. intelligent modular water treatment equipment developed by shenzhen qingquan for emergency projects has achieved remarkable results in water treatment. for example, the new emergency project of shanwei east district sewage treatment plant (3-month construction period) and the bid-raising project of shenzhen henggang sewage treatment plant (26-day construction period), on-site assembly standard parts have the following characteristics:
1. factory prefabrication with high precision;
2. planning on demand and flexible allocation;
3. compact structure and small area;
4. recycling and environmental protection.
at the conference site, the video of qingquan case in shenzhen was used to show the stable data and clear effluent effect. the experts on the spot were amazed and asked questions about the technical application of the upflow filter one after another. mr. ye changming, the first drafter of the upward flow filter design rules, gave detailed answers to the relevant technical problems raised by experts on the spot, such as the function of backwashing of the filter, the comparison of the ability to absorb pollutants, the distribution system of water and air, the filtration rate of the filter bed, the dosing of drugs and the automatic control system.
mr. ye changming, chairman of shenzhen qingquan, gives technical answers for on-site experts
the technical exchange meeting between shenzhen qingquan and shantou branch of central south academy was successful. the experts on the spot highly recognized the technical application of the upflow denitrification deep bed filter in shenzhen qingquan. after the meeting, the experts on the spot specially proposed that we could provide more processing data and process videos about the application of the upflow denitrification deep bed filter in practical cases, as a future project. technical standards for cooperation.
shenzhen qingquan is the standard drafting unit of upward flow filter design rules for urban water supply and drainage in china. it is one of the enterprises with fewer academician workstations in the industry. at present, dozens of patents on upflow filter, non-clogging biological aerated filter and other filters have been obtained, providing intelligent modular water treatment equipment and solutions for the upgrading and renovation of water supply and drainage systems in cities around the world. in the near future, shenzhen qingquan will adopt the company's core technology - "embedded water purification system", upgrade the traditional urban sewage treatment plant in situ, become a water ecological park with recreational functions, change the "short board" of the environment into a bright spot, promote the construction of urban landscape greening projects, and build a green ecological system.
