Dissertation > Excellent graduate degree dissertation topics show

The Experimental Study of Hydrolytic Acidification-Anoxic-Aerobic Process on the Treatment of Petrochemical Wastewater

Author: SunQingLiang
Tutor: HuXiang
School: Beijing University of Chemical Technology
Course: Environmental Science and Engineering
Keywords: petrochemical wastewater hydrolysis-acidification-anoxic-aerobic process operation optimization dissolved organic matter
CLC: X703
Type: Master's thesis
Year: 2013
Downloads: 171
Quote: 0
Read: Download Dissertation

Abstract


The petrochemical wastewater has the characteristics of high orgainics concentration, complex pollutants composition and poor biodegradability. The treatment of petrochemical wastewater is the focus in the field of wastewater treatement technology. In this study, a large-scale integrated petrochemical wastewater treatment plant was referred as the research object to build a laboratory-scale experimental equipment. The optimization of the operation parameters of the hydrolysis-acidification-anoxic-aerobic process was investigated using this equipment. In addition, the enhancement of the hydrolysis-acidification unit, and the dissolved organics in the effluent was also measured and analyzed during the operation. The purpose of this study was to provide support for sewage plant process innovation, and to provide the reference for research of intensive the hydrolysis-acidification technology and the hydrolysis-acidification-anoxic-aerobic process.The results showed the best operating parameters are as follows:the sludge recycle ratio (R)100%, the hydraulic retention time (HRT) of the aeration tank15h, the DO2-3mg/L, and the sludge age17~24d. At that condition, the effluent COD was the lowest and the COD removal rate was the highest, which were62.5mg/L and88%, respectively.Optimizating and improving hydrolysis acidification showed that the optimal hydraulic retention time (HRT) for hydrolysis acidification unit was14h, and the optimal proportion for industrial wastewater and domestic sewage was1:1. When appling this condition, the biodegradability of the wastewater was the best, the COD was the lowest and lowest and the UV254was the minimum. Adding the filler to hydrolyze acidification unit let COD removal rate increasing by50%. Improving and optimizing hydrolysis acidification unit made the effluent biodegradability increased98%than thaf of influent Increasing micro aerobic that could enhance the mixing to the hydrolysis acidification pool did not destruct the reduction environment. Therefore, it had little effect on hydrolysis acidification of macromolecular substances in wastewater.The classification and analysis of effluent of hydrolysis acidification unit showed that small molecule soluble organic matters with molecular weight lower than1000were the highest proportion in both of improved hydrolysis acidification and sewage treatment plant hydrolysis acidification tank, which were86%and54%, respectively. Three-dimensional fluorescence spectra show that the the effluent organic matter is mainly tryptophan protein aromatic species. Dissolved organic matter (DOM) in a biological effluent collected from a typical petrochemical wastewater treatment plant was isolated and fractionated using resin adsorption method. The fractions were operationally categorized as hydrophilic substances, hydrophobic acids, hydrophobic neutrals, and hydrophobic bases. Hydrophilic substances and hydrophobic acids are the main type of DOMs in the effluent, which accouting about49%and29%of the TOC, respectively. The peaks of infra-red spectrum of the4fractions mainly distributed in the district of600cm-1-1200cm-1, indicating that similar compounds of balmy isomers exist in the wastewater samples.Qualitative analysis of organic matters in the wastewater was carried out by GC-MS. The analysis showed that there were lots of benzenes and hydrocarbons in sewage plant hydrolysis acidification-anaerobic-aerobic tank effluent. These organics can be removed greatly by enhanced hydrolysis acidification in the laboratory-scale experimental process, which reduced the stress of the following anoxic-aerobic process.

Related Dissertations

  1. Study on the Treatment of Perochemical Wastewater by Excess Sludge Reduced Membrane Reactor,X703
  2. The Study of the Depth Treatment of the Petrochemical Wastewater and the Flocculation Reactor,X703
  3. Aging and Transport Behavior of Polycyclic Aromatic Hydrocarbons in Soils,X53
  4. Research of Enhanced Microeletrolusis-Fenton United Technics on Petrochemical Wastewater,X703
  5. Flotation -UASB- biological contact oxidation process Petrochemical Wastewater,X703
  6. Research on the Performance of ABR Treating High Concentration Petrochemical Wastewater,X703
  7. Study on the Biodegradation of Refinery Wastewater in Three-phase Fluidized Bed by Microorganism UBD,X703
  8. Flocculation Kinetics and Its Application in the Advanced Treatment of Petrochemical Wastewater,X703
  9. Hydrolysis -A / O Process Petrochemical Wastewater,X703
  10. Study on Flocculation Kinetics Applied in Advanced Treatment Process of Petrochemical Wastewater,X703
  11. The Study of the Advanced Treatment and Reuse Technology of the Petrochemical Wastewater,X703.1
  12. Combination of aerobic granular sludge metabolic petrochemical wastewater treatment,X703
  13. New Technology Research on the Application of Nano Flocculant in Petrochemical Wastewater Disposal,X703
  14. Fractionation of Dissolved Organic Matter during the Decaying Process of Rice Straw and Its Environmental Significance,X131.3
  15. Degradation of Petrochemical Wastewater by Using Biofilm-activated Sludge Hybrid Process and Advanced Treatment,X703
  16. Dynamics of dissolved organic matter on the adsorption and desorption of organic compounds,X132
  17. A Case Study on the Sewage Treatment Technology of Shandong Dongming Petrochem Group,X703
  18. The Research of Microbial Flocculant’s Application in Industrial Wastewater Treatment,X703
  19. Research and Application of Data Validation and Optimization Value for Unit Performance Optimization System,TM769
  20. Study on the Treatment of Petrochemical Wastewater Using A/O Integrative Swim-bed Process,X703.1
  21. Research on the Thermal Power Plant Operation Optimization Value Determining Based on Association Rule,TM732

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