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Study on Removal-Effect of Domastic Sewage Containing Typical PPCPs in Membrane Bioreactors and Influencies on MBR

Author: YangQi
Tutor: QiuJiangPing
School: Shanghai Jiaotong University
Course: Ecology
Keywords: Norfloxacin Naproxen PTFE membrane bioreactor PVDF membrane bioreactor Stainless steel membrane membrane bioreactor
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 71
Quote: 0
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Abstract


Pharmaceuticals and personal care products (pharmaceuticals and personal care products, PPCPs) as a class of large-scale use and the potential hazards of the physiological effects of the \. PPCPs in the environment, mainly due to human or animal medication not fully processed due to emissions of wastewater discharged into the sewage and wastewater treatment plant. In recent years, the combination process of membrane bioreactor (MBR) in wastewater reuse and refractory applications in the field of organic wastewater treatment caused a continuous concern for researchers and the business community. However, for the MBR PPCPs removal effects of PPCPs affect the operation of the MBR research rarely seen. In view of this, this paper proposes the use of the integrated MBR process under different conditions with typical PPCPs (norfloxacin and naproxen) sewage removal, its impact factor in the overall study, in PPCPs exist under for sewage removal characteristics and performance of the MBR trend in the MBR process provides a theoretical basis to fill such gaps in the research. Study found that although the high organic load concentration (COD = 600mg / L), loaded with a polyvinylidene fluoride the ethylene (Polyvinylidene fluoride, PVDF), and polytetrafluoroethylene (Poly tetra fluoro ethylene, PTFE) are two commonly used flat membranes membrane bioreactor treatment with typical PPCPs (norfloxacin and naproxen) sewage capacity is not much diminished, but the film more serious pollution, sewage treatment time was greatly reduced. Therefore, taking into account the high price of the polymer film, industrial water should be used COD = 300mg / L concentration relative suitability. By contrast with typical PPCPs (norfloxacin and naproxen) sewage capacity of the the PTFE membrane bioreactor with flow conditions and PVDF membrane bioreactor removal, found the PTFE membrane bioreactor treatment of COD and Typical PPCPs (norfloxacin and naproxen) outperformed PVDF membrane bioreactor. Just exist in the naproxen PTFE membrane biological reactor ammonia water can only reach two standards of the national urban sewage discharge and cleaning more difficult. Different indicators of ammonia water requirements in accordance with the relevant departments for economic considerations, selectable capacity is slightly lower than the imported domestic PTFE membrane of PVDF membrane as the membrane material on practical engineering applications. Analysis of the trends and mechanisms of different PPCPs affect membrane bioreactor removal capacity control variables, found that the presence of norfloxacin COD removal is less favorable, naproxen strong toxic effects on the nitrification / denitrification bacteria ; but overall, the two kinds the PPCPs of the existence of COD removal capability of the membrane bioreactor is small, that is, less than the ability to remove ammonia. In addition, the study also found that the membrane bioreactor increased over time, the ability to remove in typical PPCPs life of sewage water quality indicators, and the presence of PPCPs shortened membrane bioreactor run cycle, increasing the membrane surface partial supercritical risk, reduce sludge activity; wherein the presence of the norfloxacin greater run negative impact on the PTFE film, while the situation is the opposite of the PVDF membrane. Naproxen is particularly heavy sludge system health damage. Remove to contain typical PPCPs life of sewage performance based on membrane bioreactor explore sludge presence, found PPCPs presence under, membrane bioreactor removing organics be achieved mainly by activated sludge biological degradation pathway; in membrane bioreactor remove PPCPs, the diaphragm average contribution rate gt; 50%; This shows that activated sludge PPCPs adsorption and biodegradation. Explore new stainless steel membrane membrane bioreactor sewage treatment performance found that, although slightly lower than the traditional flat membrane membrane bioreactor process with typical PPCPs sewage capacity, but to deal with large amounts of water, easy to clean, and for film frequency is low, the price is right, the prospects for a wide range of industrial application, and worthy of further study.

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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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