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Technical Research on Hydrolysis Acidification/Pre-Denitrification Biological Aerated Filter Process

Author: LinShan
Tutor: HanHongJun
School: Harbin Institute of Technology
Course: Municipal Engineering
Keywords: Sewage Hydrolysis acidification Pre - denitrification Biological Aerated Filter
CLC: X703
Type: Master's thesis
Year: 2009
Downloads: 103
Quote: 1
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Abstract


With the increasing amount of urban sewage discharge and of the gradual improvement of the water quality requirements for discharge of sewage, and the drawbacks of traditional urban sewage treatment in activated sludge was constantly exposed. To effectively solve the city sewage plant discharge requirements and funding the construction of a \Biological Aerated Filter (biological aerated filter, BAF) new wastewater treatment technology is out research and development in this context a biological wastewater treatment technology to comply with the above requirements. The technology can be widely used in urban sewage treatment, but also can be used in water treatment. The BAF technology have good treatment effect, but only rely on the BAF technology alone is difficult to reach the urban sewage treatment plant pollutant discharge standards \phase of the project hydrolysis strengthen preconditioning plus two-stage biological aerated filter technology. Hydrolysis acidification pre-denitrification biological aerated filter technology, process the main system: coarse fine grille, the cyclone grit chamber, hydrolysis acidification sedimentation tanks, DN denitrification biofilter, CN nitrification aeration biofilter, clean water tank, UV disinfection equipment. This paper focuses on the process of the nitrogen and phosphorus removal, the study found: the process of the removal efficiency of TN and NH3-N were higher by about 50% and about 80%. The experimental analysis of the impact factor of nitrification and denitrification, and rely on the role of impact factor completion of the commissioning process. The process of TP removal chemical phosphorus removal auxiliary biological phosphorus removal by dosing Pharmacy TP removal rate at about 80 percent. This paper analyzes the biological filter head loss. Analysis DN denitrification biofilter, and CN nitrification biological aerated filter head loss with the water system and filter layer. Biofilter design head loss values ??depend on the experience value and learn from the ordinary rapid filter certain innovations. Experimental study of the whole system out of the water, and found: influent design value within the allowable range, the effluent of COD, BOD, SS, NH3-H, TN, TP equivalents can reach the \emission standards \And the process is simple and low energy consumption of the system, environmental, economic and social benefits. This thesis: the hydrolysis acidification pre-denitrification BAF technology in the actual project showed a good performance. This paper studies the application of the technology to provide a reliable theoretical basis and technical methods, open the idea of ??a municipal sewage plant construction, certain guiding significance for the future practical application of municipal sewage plant, run debug.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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