Index Catalog // GW ScholarSpace

Primary Sludge Fermentation: A Sustainable and Economic Process of Supplementing Carbon for Short Cut Nitrogen Removal

Description:: This study evaluates the selection for partial denitrification (PdN, NO3 NO2) and coupling with anammox as an alternative route of achieving short-cut nitrogen removal at Blue Plains advanced wastewater treatment plant. The use of primary sludge fermentate was evaluated as a cheaper and viable...
Author:: Ali, Priyanka
Keyword:: Partial denitrification, Fermentation, Mainstream system, Primary sludge, Nitrogen removal, and Short cut nitrogen removal
GW Unit:: Civil & Environmental Engineering
Degree:: M.S.
Advisor:: Riffat, Rumana
Committee Member(s):: De Clippeleir, Haydee, Manzari, Majid T, and Shuai, Danmeng
Resource Type:: Thesis or Dissertation

Estimation of Land Surface Turbulent Heat and Evaporative Fluxes by Assimilating Remotely Sensed Land Surface Temperature and Moisture

Description:: Land surface heat and evaporative fluxes exchanged between the land surface and the atmospheric boundary layer play an important role in the climate system. In situ measurements of these fluxes are expensive and available only over a limited number of field experiment sites. At present, the only...
Keyword:: Uncertainty Quantification, Land-atmosphere Interactions, Evaporation, Energy and Water Cycles, Land surface fluxes, and Data Assimilation
GW Unit:: Civil & Environmental Engineering
Degree:: Ph.D.
Advisor:: Farhadi, Leila
Committee Member(s):: Riffat, Rumana, Manzari, Majid T., Shuai, Danmeng, and Ng, Gene-Hua Crystal
Resource Type:: Thesis or Dissertation

Evaluating the Impact of Thermal Dose on Sludge Rheology of the Thermal Hydrolysis Pretreatment Process

Description:: The gel formation potential of the sludge in function of the thermal hydrolysis pretreatment (THP) conditions were quantified as well as its impact on digestibility and dewatering at DC Water’s Blue Plains Advanced Wastewater Treatment Plant (AWTP). First, a method named gelation method was...
Author:: Rasel, Munshi Md
Keyword:: Anaerobic digestion, Thermal Hydrolysis Process, Sludge rheology, Gelation, and Biosolids
GW Unit:: Civil & Environmental Engineering
Degree:: M.S.
Advisor:: Riffat, Rumana
Committee Member(s):: De Clippeleir, Haydee, T. Manzari, Majid, and Shuai, Danmeng
Resource Type:: Thesis or Dissertation

Evaluation of Dewatering Characteristics of Wastewater Sludge from Various Treatment Processes

Description:: A study was performed with different types of sewage sludge to determine the factors that impact polymer demand and cake total solids (TS), along with investigation of optimum polymer dose (OPD) for each sludge type. Results indicated that sludge from the thermal hydrolysis process (THP) required...
Author:: Hasan, Mahmudul
Keyword:: Optimum Polymer Dose, Sludge Dewatering, Extracellular Polymeric Substance (EPS), Biosolids, Thermal Hydrolysis Process (THP), and Cake Total Solids
GW Unit:: Civil & Environmental Engineering
Degree:: M.S.
Advisor:: Riffat, Rumana
Committee Member(s):: Riffat, Rumana, De Clippeleir, Haydee, and Shuai, Danmeng
Resource Type:: Thesis or Dissertation

Analytical Developments for the Measurement of Viscoelastic Properties with the Atomic Force Microscope

Description:: The atomic force microscope (AFM) is a relatively new technology (invented in the 1980’s) and since then there has been a substantial technological sophistication which has allowed to achieve exciting results such as high resolution imaging of matter at the nanoscale and sometimes even with...
Author:: Lopez-Guerra, Enrique Alejandro
Keyword:: Atomic force microscopy, Tapping mode, Static force spectroscopy, Viscoelasticity, Scanning Probe Microscopy, and Multiple relaxation times
GW Unit:: Mechanical & Aerospace Engineering
Degree:: Ph.D.
Advisor:: Solares, Santiago D
Committee Member(s):: Sarkar, Kausik, Shuai, Danmeng, Liang, Chunlei, and Balaras, Elias
Resource Type:: Thesis or Dissertation

Exploring the Impact of Diffusion and Substrate Structure on Hydrolysis in Mesophilic Anaerobic Digestion

Description:: Anaerobic digestion (AD) batch tests were conducted on-site at DC Water’s Blue Plains Advanced Wastewater Treatment Plant to investigate the impact of various physical parameters on hydrolysis efficiency within digestion. First, the distance between substrate and microbes, the viscosity, and the...
Author:: Manning, Elizabeth
Keyword:: Thermal hydrolysis process, Hydrolysis, Substrate structure, and Diffusion
GW Unit:: Civil & Environmental Engineering
Degree:: M.S.
Advisor:: Riffat, Rumana and De Clippeleir, Haydee
Committee Member(s):: Shuai, Danmeng
Resource Type:: Thesis or Dissertation

Insight into Nucleation Mechanisms of Tetrahedral Materials from Advanced Molecular Dynamics Simulations

Description:: This dissertation studies the nucleation mechanisms of ice, clathrate hydrate and silicon clathrate which all belong to tetrahedral materials and carry significant importance to modern society. Because of the stochastic nature and the ultra-fine scale of nucleation, the mechanisms through which...
Author:: Bi, Yuanfei
Keyword:: forward flux sampling, ice, nucleation, clathrate hydrate, silicon clathrate, and tetrahedral
GW Unit:: Civil & Environmental Engineering
Degree:: Ph.D.
Advisor:: Li, Tianshu
Committee Member(s):: Solares, Santiago, Manzari, Majid T., Naumov, Ivan, and Shuai, Danmeng
Resource Type:: Thesis or Dissertation

Evaluation and Novel Application of 45ºC Anaerobic Digestion

Description:: This study was aimed to evaluate the performance of anaerobic digestion system at 45°C condition. Both mesophilic 35°C and thermophilic 55°C temperature anaerobic digestion have been widely studied. However, very limited research has been conducted on 45°C anaerobic digestion. It is due to the...
Author:: Li, Baoqiang
Keyword:: Anaerobic Digestion, Temperature Phase Anaerobic Digestion, Volatile Fatty Acids, Methanogens, Class A biosolids, and Sewage Sludge
GW Unit:: Civil & Environmental Engineering
Degree:: M.S.
Advisor:: Riffat, Rumana
Committee Member(s):: Riffat, Rumana, Manzari, Majid T., and Shuai, Danmeng
Resource Type:: Thesis or Dissertation

High-Rate Activated Sludge Systems: A Promising Technology to Harvest Organic Carbon from Municipal Wastewater

Description:: The high-rate activated sludge (HRAS) systems are shifting the energy intensive processes to low-energy and sustainable technologies for wastewater treatment. In order to recover energy-rich organic carbon from wastewater, the HRAS system is a key technology for moving towards energy neutral (or...
Author:: Rahman, Arifur
Keyword:: Settleability, Carbon harvesting, Contact-Stabilization, Biosorption, Extracellular polymeric substance, and A-stage
GW Unit:: Civil & Environmental Engineering
Degree:: Ph.D.
Advisor:: Riffat, Rumana and De Clippeleir, Haydee
Committee Member(s):: Riffat, Rumana, De Clippeleir, Haydee, Farhadi, Leila, Jimenez, Jose, and Shuai, Danmeng
Resource Type:: Thesis or Dissertation

High-Pressure Study of Bio-inspired Multi-Functional Nanocomposites Using Atomic Force Microscopy Methods

Description:: Bioinspired design has been crucial in the development of new types of hierarchical nanocomposites. Particularly, the nacre-mimetic brick-and-mortar structure has shown excellent mechanical properties as well as gas barrier properties and optical transparency. Along with these intrinsic...
Author:: Diaz Gonzalez, Alfredo Jose
Keyword:: conductive nanocomposites, Biomimetics, transparent coatings, contact resonance force microscopy, multifrequency AFM, and conductive AFM
GW Unit:: Mechanical & Aerospace Engineering
Degree:: D.Sc.
Advisor:: Solares, Santiago
Committee Member(s):: Li, Tianshu, Keidar, Michael, LeBlanc, Saniya, and Shuai, Danmeng
Resource Type:: Thesis or Dissertation

Primary Sludge Fermentation: A Sustainable and Economic Process of Supplementing Carbon for Short Cut Nitrogen Removal

Estimation of Land Surface Turbulent Heat and Evaporative Fluxes by Assimilating Remotely Sensed Land Surface Temperature and Moisture

Evaluating the Impact of Thermal Dose on Sludge Rheology of the Thermal Hydrolysis Pretreatment Process

Evaluation of Dewatering Characteristics of Wastewater Sludge from Various Treatment Processes

Analytical Developments for the Measurement of Viscoelastic Properties with the Atomic Force Microscope

Exploring the Impact of Diffusion and Substrate Structure on Hydrolysis in Mesophilic Anaerobic Digestion

Insight into Nucleation Mechanisms of Tetrahedral Materials from Advanced Molecular Dynamics Simulations

Evaluation and Novel Application of 45ºC Anaerobic Digestion

High-Rate Activated Sludge Systems: A Promising Technology to Harvest Organic Carbon from Municipal Wastewater

High-Pressure Study of Bio-inspired Multi-Functional Nanocomposites Using Atomic Force Microscopy Methods

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