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Global water crisis can be overcome by desalination

Global water crisis can be overcome by desalination

Amimul Ahsan1,2,*, Monzur Imteaz2

Global water crisis can be overcome by desalination and it grows day by day. The Rancho San Lucas desalination plant produces 360 m3/d. It serves the Rancho San Lucas resort on Mexico’s Baja California coast. It is the first successful design of the multi-stage multi-turbo (MSMT) seawater RO. It was developed by FEDCO, Water Technologies de México (WTM), Hydranautics, and American Water Chemicals (AWC). It achieved 60% recovery [1]. An improved electrodialysis technique can produce about 2,000 L/d of drinking water. The project funded by EU. REvivED water (Fig. 1) is a low-energy consumed and sustainable solution to slake the thirst of people. It provides drinking water to 7 communities in Somaliland, Djibouti, India and Tanzania [2]….

© 2021 Ababil Publishers. All rights reserved.

To cite this article: Ahsan A, Imteaz M. Global water crisis can be overcome by desalination. Journal of Desalination and Water Purification 2020;22:1.

To link this article: http://ababilpub.com/download/jdwp22-1/

Effect of contact time of granular activated carbon on salinity and electrical conductivity

Effect of contact time of granular activated carbon on salinity and electrical conductivity

Amimul Ahsan1,2,*, Monzur Imteaz2, Mohammed Riyadh Khaleel3, Ebrahim Hamid Hussein Al-Qadami4, Iqbal Khalaf Erabee5

HIGHLIGHTS

  • Granular activated carbon (GAC) adsorption technique was applied to treat wastewater.
  • Granular activated carbons produced from coconut shell (GACCS) and from palm shell (GACPS) were used.
  • Effects of adsorption contact time of GACCS and GACPS were investigated.
  • The optimum adsorption contact time was 3 h.
  • GACCS is better than the GACPS in removing the salinity and electrical conductivity.

ABSTRACT

Adsorption is very common technique to treat wastewater where the activated carbon can adsorb various compounds from wastewater. The granular activated carbon (GAC) adsorption technique was applied to treat wastewater contaminated with various organic compounds. Two types of adsorbents were used such as granular activated carbon produced from coconut shell (GACCS) and from palm shell (GACPS). A comparison of these two adsorbents was conducted to improve the adsorbents quality. Effects of adsorption contact time of granular activated carbon produced from coconut and palm shells (GACCS and GACPS respectively) on the removal of salinity and electrical conductivity from wastewater were investigated. The optimum adsorption contact time was 3 h. The maximum salinity removal efficiency was 20% using the GACCS and the maximum electrical conductivity removal efficiency was nearly 25% using the GACCS whereas about 7% using the GACPS. The results show that the GACCS is better than the GACPS in removing the salinity and electrical conductivity from wastewater.

© 2020 Ababil Publishers. All rights reserved.

To cite this article: Ahsan A, Imteaz M, Khaleel MR, Al-Qadami EHH, Erabee IK. Effect of contact time of granular activated carbon on salinity and electrical conductivity. Journal of Desalination and Water Purification 2020;21:8-10.

To link this article: http://ababilpub.com/download/jdwp21-3/

Optimization through isotherm for removal of Congo red dye from aqueous solution using natural adsorbents

Optimization through isotherm for removal of Congo red dye from aqueous solution using natural adsorbents

M. Jadhav1,*, M. Kharade2

HIGHLIGHTS

  • The residual dyes from various industries consist of wide varieties of dyes conveyed to natural water.
  • Adsorption is an effective process for the treatment of various dye contaminated effluents.
  • Various agricultural biomass-waste products are cost effective adsorbents in wastewater treatment.
  • pH plays the utmost important role in catalyzing the adsorption process.
  • Orange pill powder shows significant results for both Langmuir and Freundlich Isotherms.

ABSTRACT

The present study investigates the application of natural low cost adsorbents (e.g. orange peel, coconut shell and groundnut shell) for removal of Congo red dye from aqueous solution. The effect of various parameters such as pH, adsorbent dose, dye concentration, stirring rate and contact time on adsorption of Congo red dye was studied. The main aim of this study is to assess the suitability of locally available low cost agri-residue as an adsorbent using batch study mode. Batch study results showed that, with increase in an adsorbent dose, removal efficiency of Congo red dye increases due to increase in available surface sites for adsorption. The Congo red dye adsorption was also affected by pH and other process parameters. pH plays the utmost important role in catalyzing the adsorption process. Orange pill powder shows better result at pH 9, coconut shell powder at pH 7 and groundnut powder at pH 4, for removal of Congo red dye. From optimization study it is seen that orange pill powder shows significant results for both Langmuir and Freundlich Isotherms with R2 values of 0.735 and 0.732 respectively. Coconut shell powder is significant for Freundlich Isotherm (R2 = 0.7445) as well as for Langmuir isotherm (R2 = 0.718). Groundnut shell powder is insignificant for both Langmuir isotherm (R2 = 0.4944) as well as Freundlich Isotherms (R2 = 0.6517). Finally, it is concluded that the orange pills and coconut shell performed better than groundnut shell.

© 2020 Ababil Publishers. All rights reserved.

To cite this article: Jadhav M, Kharade M. Optimization through isotherm for removal of Congo red dye from aqueous solution using natural adsorbents. Journal of Desalination and Water Purification 2020;21:2-7.

To link this article: http://ababilpub.com/download/jdwp21-2/

Oilfield produced water treatment: A challenge

Oilfield produced water treatment: A challenge

Amimul Ahsan1,2,*, Monzur Imteaz2

The term of oil may be replaced by crude oil or petroleum. It is a mixture of gas, liquid, and sticky, tar-like substances. Many corporations and companies withdraw crude oil from the pockets of oil resources by utilizing drilling wells and rigs. Many researchers studied on oilfield produced water treatment; however, it is a challenge. An integrated technique of activated carbon-bentonite adsorbent with double stages membrane process is suggested to treat oilfield produced water. An internal-loop airlift reactor using electrocoagulation/ flotation technique is recommended for the treatment of oilfield produced water. In fact, oilfield produced water are mostly treated in three stages; e.g. primary, secondary and tertiary processes….

© 2020 Ababil Publishers. All rights reserved.

To cite this article: Ahsan A, Imteaz M. Oilfield produced water treatment: A challenge. Journal of Desalination and Water Purification 2020;21:1.

To link this article: http://ababilpub.com/download/jdwp21-1/

Groundwater assessment of Narayanganj city of Bangladesh

Groundwater assessment of Narayanganj city of Bangladesh

M.I.I. Rabbi1*, P.M. Toma2

HIGHLIGHTS

  • Physicochemical quality of the groundwater in Narayanganj region was investigated.
  • Majority of the samples contain high concentrations of iron and hardness.
  • It was found that about 75% of samples have odor.
  • Many tube-wells have turbid water.
  • The groundwater in the studied area is not appropriate for drinking and household use.

ABSTRACT

Groundwater uses have escalated dramatically in Bangladesh over the past three decades, particularly for farming purposes, as large parts of the country have little access to surface water supplies. In the Narayanganj region, around 90% of the inhabitants use groundwater for drinking and household purposes. However, the majority of diseases in developing countries are caused by drinking contaminated water. Therefore, groundwater quality analysis and assessment are of utmost importance. In this study, the physicochemical quality of the groundwater supplied to Bangladesh’s Narayanganj region was investigated. A total of 25 samples were collected from different tube-wells of 12 wards among 27 wards for analysis purposes. To assess the physical and chemical contaminated content, various standard laboratory tests were performed and assimilated with WHO and BDS. Six physiochemical parameters namely pH, iron, hardness, turbidity, odor, and color were tested. By appraising the study, it was clear that the majority of the samples contain high concentrations of iron and hardness, and these samples deviated significantly from WHO and BDS standards. In terms of the odor, it was found that about 75% of samples have odor. pH of all samples dropped below the permissible limits. Many tube-wells have turbid water. Excess turbidity poses a risk to health and offers protection to pathogenic microorganisms. In the case of a few samples, the concentrations of hardness and conductivity are high too. The higher iron content can occur because of geological aquifer formation. Considering the higher concentration of these chosen parameters, the groundwater in the studied area is not appropriate for drinking and household use.

© 2020 Ababil Publishers. All rights reserved.

To cite this article: Rabbi MII, Toma PM. Groundwater assessment of Narayanganj city of Bangladesh. Journal of Desalination and Water Purification 2020;20:2-5.

To link this article: http://ababilpub.com/download/jdwp20-2/

Desalination to slake the thrust of people

Desalination to slake the thrust of people

Amimul Ahsan1,2,*, Monzur Imteaz2

Desalination provides a huge amount of potable water in many countries of the world, e.g. USA, KSA, UAE, Japan, Singapore, and Australia. The global Water Awards (GWA) declared recently the winner for 2020 Desalination Plant of the Year. That is Shoaiba 3 Exp. 2 IWP in KSA with a capacity of 250,000 m3/d. It fulfills the need of a million people in the regions of Jeddah, Makka and Taif. About $253 million plant was developed by ACWA Power with the Saudi Water Partnership Company (SWPC) [1]. It is 100% owned by the private sector as the first major infrastructure project in KSA. It reduces footprint and capital costs, while the operating cost on chemical dosing and post-treatment is minimized [1]….

© 2020 Ababil Publishers. All rights reserved.

To cite this article: Ahsan A, Imteaz M. Desalination to slake the thrust of people. Journal of Desalination and Water Purification 2020;20:1.

To link this article: http://ababilpub.com/download/jdwp20-1/

Environmental audit of a textile effluent treatment plant in Gazipur, Bangladesh

Environmental audit of a textile effluent treatment plant in Gazipur, Bangladesh

Sk. Md. Imdadul Islam*, Mohammad Iqbal Hossain, Muhammad Raihan

HIGHLIGHTS

  • Existing condition of an ETP was observed.
  • Operational process of the ETP was evaluated.
  • Efficiency of BOD and COD removal was determined.
  • A simple but strong methodology was developed for evaluating the performance of the ETP.
  • Some techniques were suggested to augment the efficiency of the ETP.

ABSTRACT

Environmental auditing is a necessary tool for determining the impact on environment for industries or any productive sectors. Environmental auditing therefore provides a ‘snap-shot’ of looking, i.e. what is happening at that point in a certain time. The performance of the plant actually comes from the efficiency of individual units of an effluent treatment plant (ETP) and the final effluent quality. In this study, an ETP of a textile industry in Gazipur, Bangladesh was analyzed. Bangladesh is a globally renowned garment manufacturing center for its durability, quality and beauty. The textiles and garment industry contributes a lion part to the GDP. It is an initial attempt in Bangladesh to initiate the practice of environmental audit. The samples were collected from the central unit of ETP and were analyzed for the fundamental parameters, e.g. DO, BOD, COD, TSS, pH, color and turbidity. The outcomes were used to identify problems with the treatment units and to suggest modifications. Finally, a simple but strong methodology was developed for evaluating the performance of the different treatment units and the ETP as a whole. It could be implemented by ETP director so that the effluent meets the national standards and conforms to the requirements of global buyers. The audit was performed in three steps and the final outcome was prepared.

© 2020 Ababil Publishers. All rights reserved.

To cite this article: Islam SMI, Hossain MI, Raihan M. Environmental audit of a textile effluent treatment plant in Gazipur, Bangladesh. Journal of Desalination and Water Purification 2020;19:2-8.

To link this article: http://ababilpub.com/download/jdwp19-2/

Renewable energy and wastewater treatment: Environmental and economical benefits

Renewable energy and wastewater treatment: Environmental and economical benefits

Thamer Ahmad Mohammad

The main purpose of wastewater treatment plants is to control the environmental pollution particularly in natural water bodies. From energy point of view, wastewater treatment plants have high potentials for heat generation beyond common digester gas combustion. Anaerobic digestion is a popular and energy-efficient process in which microorganisms convert organic matter into biogas in the absence of oxygen. This naturally-occurring by-product can be used as a source of renewable energy, creating an incredible opportunity to convert waste into energy. The produced energy is depending on the quantity of wastewater being treated and the strength of that wastewater. Biogas can be used in boilers to produce heat, burned in cogeneration engines to produce both electricity and heat, or, in some cases, sold back to the local grid for utility credits. Biogas contains methane, a highly-flammable fuel with incredible money-saving potential….

© 2020 Ababil Publishers. All rights reserved.

To cite this article: Mohammad TA. Renewable energy and wastewater treatment: Environmental and economical benefits. Journal of Desalination and Water Purification 2020;19:1.

To link this article: http://ababilpub.com/download/jdwp19-1/