Dissertation > Excellent graduate degree dissertation topics show

Study on Treatment of Micro-polluted Source Water by Zeolite Biological Aerated Filter

Author: SunTongXi
Tutor: ChenJianMeng；JiangZuoFeng
School: Zhejiang University of Technology
Course: Environmental Engineering
Keywords: micro-polluted source water zeolite biological aerated filter degradation properties biological characteristics
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 61
Quote: 0
Read: Download Dissertation

Abstract


As the raw water pollution is becoming increasingly serious, conventional water purification systems (CWPS) could not effectively remove some main pollutants in raw water,such as the dissolved organic matter, NH3-N , N02ˉ-N and so on. The safety of drinking water is under serious threat. In this paper, a biological aerated filter stuffed with activated zeolite was applied to pretreat micro-polluted raw water in Hangzhou. On the basis of the analysis about NH3-N adsorption properties by zeolite, experiments were carried out to discuss the starting and running performance of AZBAF, its removal characteristics for N and organics with different molecular weight as well as the distribution characteristics of biofacies on filter surface.Zeolite from Jinyun of Zhejiang province was modified by NaCl. Results showed when 15 g zeolite was modified in 100 mL NaCl solution ( mass ratio was 6% ) under room temperature, the obtained zeolite presented the best ammonia nitrogen adsorp ion property. Furthermore, activated zeolite was found to be suitable stuffing to fill the biological aerated filter due to its better porous structure and higher adsorption for N than natural zeolite and zeolite modified by NaCl.Owing to the zeolite adsorption property, AZBAF could start up quickly through the natural hanging film. Nitrobacterium and nitrosobacteria could tend to mature in 20 days. AZBAF showed fine removal capacity with around 95% of NH3-N, 25% of CODMn and 40% of TOC removed respectively during stable running. Measuring of the molecular weight of organic matter in inlet and out water showed more efficient degradation for organics of low molecular weight (<500Da)with the removal rate as high as 53.4% depended on biofilm, while interception, filtration and adsorption of stuffing for high molecular weight organics. AZBAF could be provided high resistance to Hydraulic (enhance to 2.45m3.m-2.h-1) and Ammonium (enhance to 2.7mg.L-1) shock loading. It made shutdown time had little effect to AZBAF by oligotrophic running and it could be recovered quickly in 24 hours even after shutdown for 35 days.According to the investigation into biofacies on filter surface, biomass in AZBAF decreased along the flow direction while an inverted“V”for the variation trend of biological activity. The biological activity per unit biomass increased with the distance from the intake, which was opposite to the distribution of biomass. Furthermore, the PCR-DGGE analysis showed rich microbial communities on zeolite and the above-mentioned trend for biomass could be obtained from it.

Related Dissertations

  1. Study on the Chimisorption Removal of FCC Gasoline Sulfur Compound,TE624.55
  2. Experiment Study of the Biogas Purification Process by Zeolite Filling Washing,TQ221.11
  3. The Feild Regularity and Studied on the Field of Lysiphlebus Fabarummarshall and Its Biological Characteristics,S476.3
  4. Treatment of Effluent Water from Bio-flocculation Adsorption Technology by Biological Aerated Filter (BAF),X703
  5. Studies on Biological Characteristics and Cold Tolerance of the Tetrastichus Planipennisi,S476.3
  6. Xining silicate bacteria and biological characteristics of the study should promote effective,S144
  7. Mortierella research to produce arachidonic acid,TQ921
  8. Research on the Biological-Conventional-Membrane Water Treatment Technology,TU991.2
  9. Biological Functions of Two-component Signal Transduction System CiaRH in Highly Pathogenic Streptococcus Suis Serotype 2 Strain 05ZYH33,S852.611
  10. The Application of Biological Aerated Filtering Technology on Wastewater Treatment for Reuse in Refinery Factory,X703
  11. Test of Advanced Wastewater Treatment by Hydrogen Peroxide,activated Carbon,zeolite Different Combination Processes,X703
  12. Study on Nitrogen Removal Performance in Pre-denitrification UBAF Treating Urban Sewage,X703
  13. Synthesis of Zn-Fe Hydrotalcite-like Compounds/ Zeolite and Its Adsorption of Humic Acid from Water,X703
  14. Direct Oxidation of Benzene to Phenol by N2O Over Fe-ZSM-5 Catalysts,TQ243.12
  15. Synthesis of Zeolite 4A from Natural Clinoptilolite Mineral and Bauxite Minerals,TQ424.25
  16. Research on Treatment of Micro-polluted Source Water by Slow Biofiltration,TU991.2
  17. Study on Biological Characteristics of Alternaria Solani Causing Processing Tomato Early Blight and Disease Control in North of Xinjiang,S436.412
  18. Preliminary Study of Biological Characters and Mating Type of Phytophthora Infestans Population in Gansu Province, China,S435.32
  19. The Pathogen of the Alfalfa Leaf Spot in Gansu Province,S435.4
  20. Evaluation of up-flow Two-stage Biological Aerated Filters,X703
  21. Synthesis of Fe-ZSM-5 and Application in the Hydroxylation of Phenol,TQ203

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
© 2012 www.DissertationTopic.Net  Mobile