A novel forward osmosis-nano filtration integrated system for coke-oven wastewater reclamation

2015 ◽  
Vol 100 ◽  
pp. 542-553 ◽  
Author(s):  
Ramesh Kumar ◽  
Parimal Pal
Keyword(s):  
Forward Osmosis ◽  
Coke Oven ◽  
Integrated System ◽  
Wastewater Reclamation ◽  
Nano Filtration

A thermodynamic performance analysis on influence parameters of COG-CCHP based on exergy

2018 ◽  
Vol 15 (6) ◽  
pp. 771-785
Author(s):  
Hongbin Zhao ◽  
Yu Cao ◽  
Chang Liu ◽  
Xiang Qi
Keyword(s):  
Energy Consumption ◽  
Energy Loss ◽  
Volume Fraction ◽  
Coke Oven ◽  
Integrated System ◽  
Operating Conditions ◽  
Weak Links ◽  
Coke Oven Gas ◽  
Content Type ◽  
Temperature And Pressure

PurposeThe purpose of this paper is to investigate the performance of coke oven gas (COG)-combined cooling, heating and power (CCHP) system and to mainly focus on studying the influence of the environmental conditions, operating conditions and gas conditions on the performance of the system and on quantifying the distribution of useful energy loss and the saving potential of the integrated system changing with different parameters.Design/methodology/approachThe working process of COG-CCHP was simulated through the establishment of system flow and thermal analysis mathematical model. Using exergy analysis method, the COG-CCHP system’s energy consumption status and the performance changing rules were analyzed.FindingsThe results showed that the combustion chamber has the largest exergy loss among the thermal equipments. Reducing the environmental temperature and pressure can improve the entire system’s reasonable degree of energy. Higher temperature and pressure improved the system’s perfection degree of energy use. Relatively high level of hydrogen and low content of water in COG and an optimal range of CH4volume fraction between 35 per cent and 46 per cent are required to ensure high exergy efficiency of this integration system.Originality/valueThis paper proposed a CCHP system with the utilization of coke oven gas (COG) and quantified the distribution of useful energy loss and the saving potential of the integrated system under different environmental, operating and gas conditions. The weak links of energy consumption within the system were analyzed, and the characteristics of COG in this way of using were illustrated. This study can provide certain guiding basis for further research and development of the CCHP system performance.

Influence of Organic Matters on Forward Osmosis Membrane Performance

2014 ◽  
Vol 535 ◽  
pp. 744-748
Author(s):  
Sheng Ji Xia ◽  
Yu Min Zhou ◽  
Jian Wei Chen ◽  
Rui Lin Yang ◽  
Xin Huan Zhang
Keyword(s):  
Alginic Acid ◽  
Water Flux ◽  
Forward Osmosis ◽  
Wastewater Reclamation ◽  
Ultrasonic Oscillation ◽  
Organic Matters ◽  
Membrane Performance ◽  
Potential Applications ◽  
Osmotic Pressure Gradient

Forward osmosis is an emerging membrane technology with potential applications in desalination and wastewater reclamation, osmotic pressure gradient cross the FO membrane is used to generate water flux. In contrast with conventional pressure-driving membrane process, the advantage of FO is significant: energy saving, high solute rejection and low fouling propensity. In this study, alginic acid (AA), boving serum albumin (BSA), humic acid (HA) and tannic acid (TA) were used to investigate the influence of organic fouling. The flux changed obviously, the rejection was approving and the absorption of organics was observed in the study. Ultrasonic oscillation was employed to wipe the organics off the fouling membranes, which was intend to study the quality of absorption of organic matters.

Concentration Enrichment of Fermentation Derived Acetic Acid: Transport Modeling of Forward Osmosis-Nanofiltration Integrated System

2019 ◽  
Vol 15 (1) ◽  
Author(s):  
Jayato Nayak ◽  
Parimal Pal ◽  
Zunipa Roy ◽  
Sankha Chakrabortty ◽  
Pinaki Dey ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Concentration Polarization ◽  
Transport Model ◽  
Acid Output ◽  
Forward Osmosis ◽  
Integrated System ◽  
High Concentration ◽  
Excellent Performance ◽  
Production Scheme ◽  
Internal Concentration

Abstract Forward Osmosis (FO)-Nanofiltration (NF) integration as the final product polishing step enables high concentration of acetic acid output through continuous dehydration of fermentation derived product. A mathematical transport model has been developed based on external and internal concentration polarization modulus of FO and extended Nernst–Plank equation for NF to capture the flux and rejection trends from those membranes. The modular designed production scheme ensured high flux (45 Lm−2 h−1), concentration (962 g L−1) and purity (>98 %) of acetic acid under non-neutralization condition. Excellent performance of the model is reflected in low relative error (<0.05), high Willmott d-index (>0.97) and high correlation coefficient (>0.98).

scholarly journals Application of forward osmosis membrane in nanofiltration mode to treat reverse osmosis concentrate from wastewater reclamation plants

2018 ◽  
Vol 77 (8) ◽  
pp. 1990-1997 ◽  
Author(s):  
Shahzad Jamil ◽  
Sanghyun Jeong ◽  
Saravanamuthu Vigneswaran
Keyword(s):  
Reverse Osmosis ◽  
Organic Compounds ◽  
Water Reuse ◽  
Inorganic Compounds ◽  
Forward Osmosis ◽  
Wastewater Reclamation ◽  
Permeate Flux ◽  
Acid Pretreatment ◽  
Inorganic Matter ◽  
Gac Adsorption

Abstract Reverse osmosis concentrate (ROC) from wastewater reclamation plants have high concentrations of organic and inorganic compounds, which have to be removed before its disposal. Forward osmosis (FO) and nanofiltration (NF) membranes were tested to treat the ROC for possible water reuse. This research investigated the combined and individual influence of organic and inorganic matter on the fouling of NF and FO membranes. The results revealed that the NF membrane removed most of the organic compounds and some inorganics. The study further highlighted that the FO membrane at NF mode removed the majority of the inorganic compounds and some organics from the ROC. A pretreatment of granulated activated carbon (GAC) adsorption removed 90% of the organic compounds from ROC. In addition, GAC adsorption and acid pretreatment of ROC improved the net water permeate flux by 17% when an FO membrane was used in the NF system. Acid treatment (by bringing the pH down to 5) helped to remove inorganic ions. Therefore, the resultant permeate can be recycled back to the RO water reclamation plant to improve its efficiency.

scholarly journals Removal and Fouling Influence of Microplastics in Fertilizer Driven Forward Osmosis for Wastewater Reclamation

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 845
Author(s):  
Ziyan Wang ◽  
Keqiang Liu ◽  
Ya Gao ◽  
Guanhua Li ◽  
Zhenyu Li ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Energy Requirement ◽  
Forward Osmosis ◽  
Membrane System ◽  
Performance Comparison ◽  
Wastewater Reclamation ◽  
Negative Effects ◽  
Extracellular Polymers ◽  
High Quality ◽  
Comparison Results

Insufficient removal of microplastics (MPs) and nanoplastics (NPs) may exert negative effects on the environment and human health during wastewater reclamation. The fertilizer-driven forward osmosis (FDFO) is an emerging potential technology to generate high-quality water for irrigation of hydroponic systems. In this study, the removal of MPs/NPs by the FDFO process together with their impact on FDFO membrane fouling was investigated, due to FDFO’s low molecular weight cut-off and energy requirement by using fertilizer as draw solution. Plastic particles with two different sizes (100 nm and 1 μm) and extracellular polymers released by real wastewater bacteria were utilized as model compounds for FDFO performance comparison. Results show that FDFO membrane system could generate high-quality irrigation water with only fertilizer, completely removing extracellular polymers, MPs and NPs from wastewater. It was found that the MPs and NPs themselves do not cause a significant membrane fouling. Moreover, it could help to reduce the membrane fouling caused by extracellular substances. That is probably because MPs and NPs helped to form a loose and porous fouling layer. Therefore, the FDFO process could be a long-term stable (low fouling) process for the reclamation of wastewater with high-quality requirements.

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