Dissertation > Excellent graduate degree dissertation topics show

Combined effects on microorganisms in water disinfection and disinfection byproducts control study

Author: JinShengWei
Tutor: WangXianSheng；WangXiaoDong
School: Jilin University
Course: Environmental Engineering
Keywords: Free chlorine Chlorine dioxide Joint disinfection Disinfection byproducts
CLC: R123.1
Type: Master's thesis
Year: 2011
Downloads: 121
Quote: 0
Read: Download Dissertation

Abstract


Since the early 1900s began to introduce in the water supply since free chlorine disinfection process , such as typhoid, cholera and other water- borne diseases have been effectively controlled , as the most common disinfectant , free chlorine in water treatment disinfection process plays an important effect. However, free chlorine in killing microorganisms while only can cause a reaction on the nose and palate with water and humic acid organic reaction trihalomethanes , haloacetic acids and other disinfection byproducts , such organic byproducts are considered potential carcinogen . As an alternative disinfectant chlorine dioxide , free chlorine greater than the oxidation, disinfection better than free chlorine , and does not undergo substitution reaction with organic halogenated organic by-products . However , chlorine dioxide is unstable and difficult to maintain lasting disinfection effect , meanwhile, will produce Yalvsuangen other inorganic disinfection byproducts . In this paper, strong oxidizing chlorine dioxide and free chlorine persistence of free chlorine and chlorine dioxide disinfectant for joint experiments in water samples for microbiological and control of disinfection byproducts . Experimental results show that : Use a mixture of chlorine dioxide and chlorine disinfectant when combined reach 3log kill when free chlorine disinfectant CT value 14.9% ; combined action of disinfectants can kill 7.2log observed , while the largest single disinfectants were 5.02log and 3.42log; disinfectant effect of temperature on the joint has a great influence , pH value has little effect on the disinfection effect ; combined organic disinfectant byproducts control effect is remarkable , the smallest percentage reduction THM 71.5% . Inorganic products of control also reduced by at least 49.5% ; joint disinfectants can reduce DBPs formation potential , combined disinfectant than free chlorine disinfection byproducts formation potential reduced by at least 56.4% , the effect is significant ; inorganic byproducts amount comply with GB5749-2006 requirements. This paper also made ​​a joint application of disinfectants outlook , we want to joint research can be applied to the actual disinfectant in drinking water treatment , and better serve the community.

Related Dissertations

  1. Oxygen Delignification and Bleaching with Chlorine Dioxide of Reed Kraft Pulp,TS745
  2. The Research on Enhanced Coagulation to Micro-polluted Raw Water Treatment,TU991.2
  3. Study on the Experiment About Preparing Composite CLO2 and Dealing with Industrial Circulating Cooling Water,TQ085.4
  4. Research on Controlling Technologies of Odor Caused by Drinking Water Disinfection,TU991.2
  5. Control of Cucumber Fusarium Wilt with Chlorine Dioxide and Manure,S436.421
  6. The Study of Chlorimaine Disinfection in the 6～(th) Water Works of Chengdu,TU991.2
  7. Study on Organic Stabilized Chlorine Dioxide,O613
  8. Control and Analysis Study to Produce and Employ the Chlorine Dioxide,TQ124.4
  9. Study on Treatment of Refractory Wastewater by Chlorine Dioxide Catalytic Oxidation,X703.1
  10. Research of Controling Chloroform in Drinking Water Using Chlorine Dioxide Disinfection,TU991.2
  11. Study on the Biological Contact Oxidation Pretreatment Process of Micropolluted Source Water,X703.1
  12. O_3/GAC process control of drinking water chlorination disinfection byproducts,X703.1
  13. Investigation on the Removal of Disinfection By-products Precursor by TiO2 Films Catalyzed Ozonation,TU991.2
  14. Chlorine Dioxide,TQ124.43
  15. Development of chlorine dioxide generator control system,TP273
  16. Research of Organism Extractions of Drinking Water and Toxicity,R123.1
  17. Study on the Change and Control of Disinfection Byproducts in Drinking Water Supply System in Xi’an City,TU991.2
  18. Studies on the Water Quality Safety and Residual Chlorine Control in Municipal Water Supply System,TU991.2
  19. Study on the Chemical and Electrochemical Reactions of Oxidizer Containing Chlorine,O611.3
  20. Study on Disinfection of Hospital Wastewater Treated by Membrane Bioreator (MBR) Using Sodium Hypochlorite,X799.5
  21. Experimental Research for Disinfected Methods in the Course of Wastewater Reuse,X703.1

CLC: > Medicine, health > Preventive Medicine,Health > Environmental health,environmental medicine > Water and water supply sanitation > Health surveillance of the health standards of water and water
© 2012 www.DissertationTopic.Net  Mobile