Dissertation > Excellent graduate degree dissertation topics show

Experimental Research on Direct Filtration of Low Turbidity Water with Superimposed Filter

Author: LiDong
Tutor: XuShiRong
School: Hunan University
Course: Municipal Engineering
Keywords: Low turbidity water Quartz sand filtration medium Comet fiberfiltration medium Superimposed filter Filtration performance
CLC: TU991.2
Type: Master's thesis
Year: 2013
Downloads: 10
Quote: 0
Read: Download Dissertation


The superimposed filter which contained quartz sand and comet fiber filtrationmedium was designed in this paper. It was used to treat the water with low turbidityby micro-flocculation direct filtration. The raw water was filtrated by superimposedfilter after dosing PAC. The experiment results show as follows:The total height of the filter layer is800mm. Considering the superimposed filterfiltering effect and filter fiber costs, when the thickness of the upper filter is400mmand the thickness of the under filter is400mm and the quartz particle size rangebetween0.95mm and1.35mm, the superimposed filter has better filter performance,further more, both filter layers take full advantage of the interception capability.When the initial filtration rate is15m/h, the water production of superimposedfilter is the largest in the entire filtration cycle, and the water quality can meet thenational standards within filtration cycle. The removal rate of turbidity, CODMn,ammonia and nitrite nitrogen is97%,58%,75%and81%respectively.The superimposed filter is backwashed by the manner of gas-water combination,making the layer of quartz sand in a suspended state and the layer of comet fiberfiltration medium in a uniform agitation state. The entire Backwashing is lasted11min.when the water washing strength is14L/(m~2×s) and gas washing strength is35L/(m~2×s), the backwash water consumption rate is1.37%, the remaining deposition rateis1.36%.Based on a large number of test data, the superimposed filter’s three performancecurves are plotted: the curve of the relationship between water yielding per day(Qm)and initial filter filtration rate(V), the curve of the relationship between filtrationcycle(T) and initial filter filtration rate(V), the curve of the relationship betweenfiltration head loss(△H) and initial filter filtration rate(V). When the raw waterquality or water yielding change, the operator can adjust the operating parametersaccording to the overall performance curves.

Related Dissertations

  1. Powered Activited Carbon-UF for Treating Micro-polluted Surface Water,X703
  2. Based on the numerical study of the characteristics of the industrial structure Fiber Filter,X701.2
  3. Study on Treatment of Sludge Floccutated by Flocculants of Oilfield Wastewater,X703
  4. Study on Operating Characteristics of Flat-Sheet Membrane Bioreactor under Different Water Quality and Membrane Materials,X703
  5. Enhace the Treatment Effect of Low Temperature and Low Turbidity Water by Recycling the Combined Filter Backwash Water,X703
  6. Research on Preparation and Filtration Performance of Water-Resistant Polyvinyl Alcohol Nanofiber Mats,TS156
  7. Efficient Solid-liquid Separation Applies to Drinking Water Treatment,TU991.2
  8. Study on the Treatment of Low Temperature and Low Turbidity Raw Water in Small Cities and Towns of Northwestern Regions by Using Pellet Flocculation Process,X703
  9. Study on Solid-liquid Separation Characteristic of the Fertile Liquor from Natrium-alkali FGD Technology,X701
  10. Experimental Research on Resource Recovery and Hybrid Membrane Bio-Reactor Treatment of Alkali-Minimization Wastewater,TQ340.9
  11. Study on Treatment of Low Temperature and Low Turbidity Water by Enhanced Coagulation,TU991.2
  12. Experimental Research on the Performance of PTFE Compound Filtration Medium of Bag Filter,X701.2
  13. Liquid Filtration Characteristics of Metal Rubber Material and Experimental Study,TQ336.43
  14. Meltblown / electrostatic spinning method polylactic acid composite nonwovens and filtration properties of Preparation,TS176.5
  15. Investigation on the Development and Properties of New Anticlogging Filtration Material,TS176
  16. Preparation of Non-woven Composite Fuel Filter Media and Study on Filtration Performance,TS176
  17. The Theoeretical and Experimental Research on the Influence Factors of the Filtration Performance of CMWF,X734.2
  18. Research on the Needling Process and PTFE Emulsion Finishing of Basalt/PPS Composite Filter,TS195
  19. Preparation and Study on Structure and Filtration Performace of Spunbonded/Melt-blown Nonwovens,TS176
  20. A Study on Filtration Performance of Nonwoven Air Filtering Material,TS176.5

CLC: > Industrial Technology > Building Science > Municipal Engineering > Water supply project ( on the Water Works ) > Clean Water ( water treatment )
© 2012 www.DissertationTopic.Net  Mobile