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Articles by Yang Qiqi
Total Records ( 3 ) for Yang Qiqi
  Husham T. Ibrahim , He Qiang , Yang Qiqi and Yang Chun
  A combined runoff-sediment model is used to simulated soil erosion processes and predict soil loss of land surface. The Stanford Watershed Model (SWM) is used as runoff generator for this model. Effects of sensitive parameters errors on soil erosion characteristics are investigated. These characteristics include peak erosion and mean monthly erosion rates. Three different methods are used for the analysis, namely; first-order uncertainty analysis method; direct investigation technique and mean-maximum likelihood method. The aim is to quantify sensitive parameters errors propagation and to gain an appreciation of the approximate magnitudes of model output uncertainty caused by different levels of sensitive parameters uncertainty. Model output uncertainty ranges between (4.000-83.115)% for mean monthly erosion against (4.680-83.098)% for peak erosion. Uncertainty in simulated erosion due to sensitive parameters uncertainty is subsequently analyzed. The probability of peak erosion values occurrence due to sensitive parameters error are investigation. Based on the result obtain, high and moderately parameters are identified. Appropriate conclusion are drawn and suggestion for future work are introduced.
  Husham T. Ibrahim , He Qiang , Wisam S. Al-Rekabi and Yang Qiqi
  This review paper intends to provide an overall vision of biofilm technology as an alternative method for treating waste waters. This technology has been gaining popularity through the years, mainly because many wastewater treatment plants, which are still used Activated Sludge Process (AS) are present some shortcomings when exposed to increased hydraulic and organic loads. Fundamental research into biofilms is presented in three sections, Biofilm Types and Characterization, Advantages and Drawbacks and Design Parameters. The reactor types covered in this review are: un-submerged fixed film systems (trickling filters and rotating biological contactors) and submerged fixed film systems (biological aerated flooded filters, submerged aerated filters, biofilm up-flow sludge blanket, fluidized bed, expanded granular sludge blanket, biofilm airlift suspension, internal circulation, moving bed biofilm and membrane biofilm) reactors.
  Yang Qiqi , He Qiang and Husham T. Ibrahim
  The aim of this study is to present the Moving Bed Biofilm (MBB) technology as an alternative and successful method to treating different kinds of effluents under different conditions. In the past few years this technology has become more common and widely used in the world because the need for clean water is rapidly increasing as the world’s population grows by each year, so many wastewater treatment facilities are needed to being expanded to provide additional capacity with least possible cost. This review covered the most important processes on MBB such as basic treatment process, kinetics of biofilm, growth and detachment of particles, modeling of MBB and affecting of carrier type and filling ratio. The review also includes many relevant researches carried out at the laboratory and pilot scales.
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