| The contradiction between improve drinking water quality standards and surface water quality deterioration making the upgrading of traditional craft has become an urgent need to water plants,especially in the south to the river water for the water supply plant often faced with unstable water quality caused by seasonal weather,engineered to have the flexibility to deal with changing water quality of the new technology is currently upgrading the general direction.The issue with the Dongsheng Town,Zhongshan City waterworks upgrade project for the study,in according to the processing capacity of the existing water purification treatment technology at home and abroad and the application prospect of the comparison of argument,proposed to flexible gas float switch mode and the precipitation pattern new air flotation precipitation one-piece technology for the retrofit scheme,and optimize the operating conditions,In order for a pilot test of the nine-month study.Pilot test to select waterworks water for water model,focus detection analysis respectively run gas float mode and precipitation water quantity,chromaticity and turbidity,algae CODMn,ammonia nitrogen concentration Is in line with the "drinking water health standards"(GB5749-2006),and compared with water during the same period before the filter water validation processing capacity of the new technology.When raw water turbidity in 7.1～9.98NTU changes,run air flotation water turbidity changes in 0.50～0.99NTU,flocculation part after adding fillers,floating pattern changes in 0.33～0.53NTU,under the condition of the same raw drug dosing quantity,water filter before the process effluent turbidity in 1.44～3.82NTU;Raw water turbidity changes in 15.8-72.3NTU,the pilot model run air flotation water changes in 0.78～1.12NTU,before water filtration process effluent turbidity changes in 1.7-3.93NTU;Algae large number of months in April and September,when algae in raw water quantity in 0.83-4.96 million/L change,pilot model gas float mode after processing the algae in water quantity 410～102 thousand/L change,treatment effect,stable water filter before the process of algae in water quantity 118～660 thousand/L change;Results show that under the existing water quality models run air flotation model’s ability to deal with algae and turbidity were superior to waterworks original sedimentation tank.When raw water turbidity in 7.81～330NTU changes,run pilot model precipitation patterns effluent turbidity in change of 1.10～3.10 NTU,the same conditions before water filtration process effluent turbidity changes in 2.02～4.30NTU;Algae in raw water quantity in 1.36-3.397 million/L changes,the pilot model running inclined plate sedimentation model after water algae number 160～467 thousand/L change,algae water filter before the process out of the water quantity 259～661 thousand/L change;Results show that the model of running the ability to deal with algae and turbidity precipitation patterns were superior to the original sedimentation tank.Although gas dissolved air equipment,release is poorer,influence the treatment effect,quickly float process failed to achieve the best effect,turbidity removal rate over 93%,most of the time the algae removal rate over 93%,CODMn removal efficiency can reach 60%,ammonia nitrogen removal efficiency of 80%or more.,the effluent water quality fully meet the new national standard requirements.Based on the results of the pilot test upgrade scheme,the city of zhongshan,decided to waterworks will change tank for settling down the pool.According to the rated throughput and operating pressure,air compressor selection 5 groups of electric standard EAS10 air compressor,dissolved air equipment selection with ladder ring of Shanghai environmental protection equipment factory production of RG-400 type solvent tank.Air flotation tank in air flotation separation area laid in lateral flow inclined plate,plate,lm long,Angle 60°.Gas floating contact district 3.5m,warden 9.5m,the pool’s total factory 14m,10 m wide,2.05m high.Erection span bridge type sludge scraper is 10.6m. |
