Numerical and experimental investigation on the forward osmosis (FO) process for the operational conditions and spacer configuration optimization in microalgae dewatering

2021 ◽  
Vol 40 ◽  
pp. 101922
Author(s):  
Haitao Wen ◽  
Jie Wang ◽  
Huu Hao Ngo ◽  
Hongwei Zhang ◽  
Ruzhen Bai ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Forward Osmosis ◽  
Configuration Optimization ◽  
Operational Conditions

Experimental investigation of forward osmosis process for boron removal from water

2020 ◽  
Vol 38 ◽  
pp. 101570
Author(s):  
Nawaf Bin Darwish ◽  
Abdullah Alkhudhiri ◽  
Abdulrahman AlAlawi ◽  
Hamad AlRomaih ◽  
Nidal Hilal
Keyword(s):  
Experimental Investigation ◽  
Forward Osmosis ◽  
Boron Removal

Effect of Kinematic Viscosity of Barrier Fluids on the Performance of a Bi-Directional Integrated Pumping Ring for Dual Mechanical Seals

2016 ◽  
Author(s):  
H. A. Warda ◽  
I. G. Adam ◽  
A. B. Rashad ◽  
M. W. Gamal Aldin
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Kinematic Viscosity ◽  
Numerical Models ◽  
Experimental Setup ◽  
Mechanical Seals ◽  
Operational Conditions ◽  
Performance Curves ◽  
Temperature Ranges ◽  
Models Validation

An experimental investigation is carried out to evaluate the performance of bi-directional pumping ring for dual mechanical seals. An experimental setup is constructed, and appropriate instrumentation are employed to measure the pressure, temperature, and flow rate of the barrier fluid. The experimental study focused on the influence of the kinematic viscosity of the barrier fluid on the performance of the pumping ring. This is done by monitoring Q-ΔP curves for various barrier fluids and temperature ranges. The tests are conducted for industrial barrier fluid compositions which are recommended by vendors of dual mechanical seals, such as Propylene Glycol-water mixtures and Diesel fuel (Grade D2). Despite the importance of the measured performance curves for process control purposes, indicated experimental curved are generalized so that they can be employed in prediction of pumping ring performance for different sizes and operational conditions. Moreover, they can be utilized for numerical models validation.

High strength domestic wastewater treatment with submerged forward osmosis membrane bioreactor

2015 ◽  
Vol 72 (1) ◽  
pp. 141-149 ◽  
Author(s):  
Bilal Aftab ◽  
Sher Jamal Khan ◽  
Tahir Maqbool ◽  
Nicholas P. Hankins
Keyword(s):  
Wastewater Treatment ◽  
Membrane Bioreactor ◽  
Forward Osmosis ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
High Strength ◽  
Feed Solution ◽  
Cellulose Triacetate ◽  
Organic Content ◽  
Operational Conditions

Abstract Forward osmosis membranes are less prone to fouling with high rejection of salts, and the osmotic membrane bioreactor (OMBR) can be considered as an innovative membrane technology for wastewater treatment. In this study, a submerged OMBR having a cellulose triacetate membrane, with the active layer facing the feed solution configuration, was operated at different organic loading rates (OLRs), i.e., 0.4, 1.2 and 2.0 kg-COD/(m3·d) with chemical oxygen demand (COD) concentrations of 200 mg/L, 600 mg/L and 1,000 mg/L, respectively, to evaluate the performance on varying wastewater strengths. High organic content with sufficient amount of nutrients enhanced the biomass growth. High OLR caused more extrapolymeric substances production and less dewaterability. However, no significant differences in fouling trends and flux rates were observed among different OLR operational conditions.

Numerical and experimental investigation on configuration optimization of the large-size ionic wind pump

Energy ◽  
2019 ◽  
Vol 171 ◽  
pp. 624-630 ◽  
Author(s):  
Jianfei Zhang ◽  
Lingjian Kong ◽  
Jingguo Qu ◽  
Shuang Wang ◽  
Zhiguo Qu
Keyword(s):  
Experimental Investigation ◽  
Ionic Wind ◽  
Configuration Optimization ◽  
Large Size

Dynamic Assessment of the Iron Bridge at Paderno d’Adda (1889)

2010 ◽  
Vol 133-134 ◽  
pp. 709-714 ◽  
Author(s):  
Carmelo Gentile ◽  
Antonella Saisi
Keyword(s):  
Experimental Investigation ◽  
Modal Analysis ◽  
Dynamic Assessment ◽  
Ambient Vibration ◽  
Modal Parameters ◽  
Dynamic Tests ◽  
Operational Conditions ◽  
Vibration Data ◽  
Output Only ◽  
Identification Techniques

The paper presents the experimental modal analysis recently carried out on the historic iron bridge at Paderno d’Adda (1889). The dynamic tests were performed in operational conditions (i.e. under traffic and wind-induced excitation) between June and October 2009 and different output-only identification techniques were used to extract the modal parameters from ambient vibration data. The described tests represent the first experimental investigation carried out on the global characteristics of the bridge, since the load reception tests of 1889 and 1892.

scholarly journals Removal of Chromium from Water Environment by Forward Osmosis System

2021 ◽  
Vol 333 ◽  
pp. 04007
Author(s):  
Minh Tuan Pham ◽  
Syouhei Nishihama ◽  
Kazuharu Yoshizuka
Keyword(s):  
Removal Efficiency ◽  
Active Layer ◽  
Water Environment ◽  
Forward Osmosis ◽  
Feed Solution ◽  
Operational Conditions ◽  
Draw Solution

Forward osmosis (FO) technology has been applied for removal of chromium (Cr) from water environment. Comparison of the removal efficiency of Cr(VI) and Cr(III) was investigated by changing several operational conditions. The pH of feed solution plays an important role in rejection of Cr. The Cr(VI) rejection was increased with increasing pH, while Cr(III) rejection was stable. It also demonstrated that the rejection of Cr was higher when the membrane active layer faces the feed solution compared to the rejection when the membrane active layer faces the draw solution.

scholarly journals Role of Operating Conditions in a Pilot Scale Investigation of Hollow Fiber Forward Osmosis Membrane Modules

Membranes ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 66 ◽  
Author(s):  
Victoria Sanahuja-Embuena ◽  
Gabriel Khensir ◽  
Mohamed Yusuf ◽  
Mads Friis Andersen ◽  
Xuan Tung Nguyen ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Dominant Role ◽  
Forward Osmosis ◽  
Pilot Scale ◽  
Extensive Study ◽  
Operating Conditions ◽  
Great Promise ◽  
Operational Conditions ◽  
Membrane Modules

Although forward osmosis (FO) membranes have shown great promise for many applications, there are few studies attempting to create a systematization of the testing conditions at a pilot scale for FO membrane modules. To address this issue, hollow fiber forward osmosis (HFFO) membrane modules with different performances (water flux and solute rejection) have been investigated at different operating conditions. Various draw and feed flow rates, draw solute types and concentrations, transmembrane pressures, temperatures, and operation modes have been studied using two model feed solutions—deionized water and artificial seawater. The significance of the operational conditions in the FO process was attributed to a dominant role of concentration polarization (CP) effects, where the selected draw solute and draw concentration had the biggest impact on membrane performance due to internal CP. Additionally, the rejection of the HFFO membranes using three model solutes (caffeine, niacin, and urea) were determined under both FO and reverse osmosis (RO) conditions with the same process recovery. FO rejections had an increase of 2% for caffeine, 19% for niacin, and 740% for urea compared to the RO rejections. Overall, this is the first extensive study of commercially available inside-out HFFO membrane modules.

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