Nanofiltration-Reverse osmosis hybrid process for hardness removal in groundwater with higher recovery rate and minimization of brine discharges

2021 ◽  
Author(s):  
Fatima Elazhar ◽  
Maryem Elazhar ◽  
Soufian El-Ghzizel ◽  
Mustapha Tahaikt ◽  
Mohamed Zait ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Recovery Rate ◽  
Hybrid Process ◽  
Hardness Removal

Simultaneous nitrogen, phosphorous, and hardness removal from reverse osmosis concentrate by microalgae cultivation

2016 ◽  
Vol 94 ◽  
pp. 215-224 ◽  
Author(s):  
Xiao-Xiong Wang ◽  
Yin-Hu Wu ◽  
Tian-Yuan Zhang ◽  
Xue-Qiao Xu ◽  
Guo-Hua Dao ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Microalgae Cultivation ◽  
Hardness Removal

A Study on Scale Determination of FO-RO Hybrid Process Based on FO Recovery Rate

2017 ◽  
Vol 79 ◽  
pp. 75-79 ◽  
Author(s):  
Geon-Youb Kim ◽  
Jun-Won Jeong ◽  
Min-Gue Kim ◽  
Hyung-Soo Kim ◽  
Ji-Hoon Kim ◽  
...  
Keyword(s):  
Recovery Rate ◽  
Hybrid Process

Study of Application on Reverse Osmosis Concentrated Water Circulation in Desert Greenhouse

2013 ◽  
Vol 409-410 ◽  
pp. 287-293
Author(s):  
Xin Fang Yan ◽  
Jun Cang Tian
Keyword(s):  
Reverse Osmosis ◽  
Recovery Rate ◽  
Water Pressure ◽  
Water Discharge ◽  
Water Circulation ◽  
Cost Ratio ◽  
Raw Water ◽  
Dense Water ◽  
Water Drip ◽  
System Water

Aiming at the problem of concentrated water discharge amount is larger and the recovery rate is low in desert greenhouse for desalination of brackish water,Using reverse osmosis concentrated water circulation system.The results showed: With less dense water emissions, System desalinization rate decreases, system recovery rate increases, water flow in the system decreases, the system water pressure increases. In this test, when dense water emissions is 0.81m3/h, System desalinization rate reaches up to 91%, system recovery rate reached up to 81%, saving water above 20%. Major ion SO42-, Cl-, Ca2+ and Mg2+ removal rates are 96.2%, 92.7%,100% and 100%. The order of yield and benefit on Planting pepper are: wheel irrigation drip > water drip > mixed irrigation drip > raw water drip irrigation under different irrigation modes.Benefit-cost ratio of wheel irrigation drip ,water drip and mixed irrigation drip are 17.68,13.61 and 4.61.

scholarly journals Pilot-Scale Investigation of Forward/Reverse Osmosis Hybrid System for Seawater Desalination Using Impaired Water from Steel Industry

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Hanaa M. Ali ◽  
Hanaa Gadallah ◽  
Sahar S. Ali ◽  
Rania Sabry ◽  
A. G. Gadallah
Keyword(s):  
Reverse Osmosis ◽  
Hybrid System ◽  
Membrane Fouling ◽  
Steel Industry ◽  
Water Flux ◽  
Operating Time ◽  
Pilot Scale ◽  
Operating Conditions ◽  
Hybrid Process ◽  
Impaired Water

This paper was focused on the investigation of a forward osmosis- (FO-) reverse osmosis (RO) hybrid process to cotreat seawater and impaired water from steel industry. By using this hybrid process, seawater can be diluted before desalination, hence reducing the energy cost of desalination, and simultaneously contaminants present in the impaired water are prevented from migrating into the product water through the FO and RO membranes. The main objective of this work was to investigate on pilot-scale system the performance of the combined FO pretreatment and RO desalination hybrid system and specifically its effects on membrane fouling and overall solute rejection. Firstly, optimization of the pilot-scale FO process to obtain the most suitable and stable operating conditions for practical application was investigated. Secondly, pilot-scale RO process performance as a posttreatment to FO process was evaluated in terms of water flux and rejection. The results indicated that the salinity of seawater reduced from 35000 to 13000 mg/L after 3 hrs using FO system, while after 6 hrs it approached 10000 mg/L. Finally, FO/RO system was tested on continuous operation for 15 hrs and it was demonstrated that no pollutant was detected neither in draw solution nor in RO permeate after the end of operating time.

scholarly journals REVIEW : PROFIL HYBRID MEMBRANE DALAM PROSES REDUKSI AIR LIMBAH

2015 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Ian Kurniawan ◽  
Pra Dian Mariadi
Keyword(s):  
Reverse Osmosis ◽  
Hybrid Membrane ◽  
Hybrid Process

Frekuensi penggunaan air sangat tinggi seiring dengan perkembangan teknologi dan pertumbuhan jumlah penduduk. Peningkatan standar hidup manusia yang semakin tinggi menimbulkan permasalahan lingkungan terkait dengan kualitas air akibat bahan kimia, nutrisi, lindi, tumpahan minyak, pembuangan limbah bahan berbahaya, serta penggunaan bahan dispossable dan non-biodegradable. Perkembangan sumber daya teknologi menghasilkan suatu revolusi sehingga menghasilkan lebih banyak bahan dan senyawa kimia. sejumlah senyawa yang diidentifikasi memiliki ancaman potensial terhadap organisme lingkungan hidup. Tujuan penelitian ini adalah mengidentifikasi teknik pengolahan air limbah dengan menggabungkan dua sifat membran dalam mereduksi air limbah. Metode yang digunakan adalah review dari beberapa sumber pustaka dengan melakukan studi literatur terdahulu terhadap beberapa penelitian yang pernah dilakukan. Kesimpulan dari penelitian menghasilkan bahwa teknologi membran sebagai salah satu instalasi unit pengolahan limbah perkembangan dan kemajuannya sangat menjanjikan dan banyak dilakukan dalam proses dengan prinsip pemisahan dan pemurnian air. Teknologi membran bisa menjadi solusi dalam pengolahan air limbah, seiring dengan perkembangannya membran dapat dikombinasikan (Hybrid Process) dengan menggunakan berbagai jenis membrane yaitu Ultrafiltrasi, Mikrofiltrasi, Nanofiltrasi dan Reverse Osmosis, akan tetapi harus diperhatikan kondisi operasional dari proses tersebut. Kata kunci: air limbah, hybrid membrane, reduksi

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