Removal of Total Dissolved Solids from Reverse Osmosis Concentrates from a Municipal Wastewater Reclamation Plant by Aerobic Granular Sludge

Kim, Do-Hyung; Park, Sangjin; Yoon, Yeomin; Park, Chang Min

doi:10.3390/w10070882

Cited by 7 publications

(3 citation statements)

References 48 publications

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“…This is in accordance with the study conducted by Do-Hyung Kim et.al. 14 where there was reduction in the concentration of total dissolved salts by reverse osmosis technique which was significant.…”

Section: Discussionmentioning

confidence: 99%

Community De-fluoridation - Experience in Kaiwara Village, Chikkaballapur District, Karnataka, India

2020

IJPHRD

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Background and objective: Reverse osmosis technique is an adequate method for treating ground water for reducing the burden of abnormal levels of fluorides. The method protects the general population from diseases associated with high fluoride levels in the body. The objective of the present study was to assess the suitability and sustainability of reverse osmosis technology for community de-fluoridation of water used for cooking and drinking purposes in Kaiwara village, Karnataka.Methodology: This interventional study was conducted between July 2012 and June 2014 at Kaiwara village, Karnataka using reverse osmosis technique for de-fluoridation of water used for drinking and cooking. Complete chemical analysis of water was done before intervention, and processed water supplying the village was tested every six months after intervention for about two years. The variation in chemical concentrations of various components were analysed. Results:The mean baseline level of fluoride in untreated water was 2.075 mg/dl (above the safety limit), which dropped to 0.08 mg/dl at the end of first six months following the intervention, 0.042 mg/dl in 12 months, 0.1 mg/dl at 18 months and 0.01 mg/dl at 24 months after intervention, which were all below the safety limits for India in the treated water. The mean total dissolved solids in the water was 542.25 mg/dl in the untreated water, which dropped to zero after the first six months, remained at zero in the next six months, rose to 120 mg/dl at 18 months and then dropped to 70 mg/dl at 24 months in the treated water. The observed values were reduced significantly. Discussion:The study concluded that it is possible to set up a community de-fluoridation plant using reverse osmosis technique at Kaiwara village, Karnataka which is economically sustainable and acceptable by local population.

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Section: Discussionmentioning

confidence: 99%

Community De-fluoridation - Experience in Kaiwara Village, Chikkaballapur District, Karnataka, India

2020

IJPHRD

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“…RO membranes push water molecules from saline water to the less saline area by applying a hydraulic pressure greater than the osmotic pressure across a semipermeable membrane [21]. This semipermeable membrane inhibits the majority of dissolved impurities from passing through to the pure water side (Figure 3).…”

Section: Methodsmentioning

confidence: 99%

System of Sensors and Actuators for the Production of Water Used in the Manufacture of Medicines

Silva

Fonsêca

Silva

et al. 2019

Sensors

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This paper presents the development and implementation of a centralized industrial network for an automatic purified water production system used in the pharmaceutical industry. This implementation is part of a project to adapt an industrial plant to cope with advances in industrial technology to achieve the level of Industry 4.0. The adequacy of the instruments and the interconnection of the controllers made it possible to monitor the process steps by transforming a manual plant, with discontinuous production into an automated plant, improving the efficiency and quality of the produced water. The development of a supervisory system provides the operator with a panoramic view of the process, informing in real-time the behavior of the variables in the process steps, as well as storing data, event history and alarms. This system also prevented the collection of erroneous or manipulated data, making the process more transparent and reliable. Accordingly, we have been able to tailor this water treatment plant to operate within the minimum requirements required by the regulator.

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“…Thus, considering a benchmark for the present study was a major challenge. A study conducted byKim et al (2018) tried to remediate the RO concentrate with the help of aerobic sludge as the baseline. The optimized OLR of the present study was on par with the range (2.1-4.3 kg COD/m 3 .d) prescribed by the above author with marginally lower to a similar level of recovery (i.e.…”

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confidence: 99%

Bioremediation of reverse osmosis concentrate generated from the treatment of landfill leachate

Choudhury

Singh²,

Palani

et al. 2023

Environ Sci Pollut Res

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The moisture content of municipal solid waste (MSW) and local precipitation events lead to the leachate generation from MSW land lls. The high concentration of organic pollutants in land ll leachate makes it hazardous, requiring treatment before disposal into the environment. Land ll Leachate is most commonly treated by reverse osmosis (RO), which generates large volumes of wastewater termed as RO reject. This investigation aims to stabilize the RO reject through an inexpensive and effective bioremediation strategy. A bench-scale aerobic suspended growth reactor study was conducted using three commercial conversion agents, namely EM.1, Bokashi powder, and coir pith powder. Overall benchscale e cacy of 63% was achieved in this study. The onsite studies were conducted in 7.5 kL arti cial ponds with 46% e cacy amid atmospheric in uences and constraints. In contrast, the control pond with no conversion agents showed an increase in pollution concentration over the 100 days of retention time.The ndings revealed that the investigated technology had a marginally lower evaporation rate and performed relatively well compared to traditional solar evaporation ponds. Moreover, the technology can be easily scaled-up and readily applied for RO reject treatment in MSW land lls.

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Removal of Total Dissolved Solids from Reverse Osmosis Concentrates from a Municipal Wastewater Reclamation Plant by Aerobic Granular Sludge

Cited by 7 publications

References 48 publications

Community De-fluoridation - Experience in Kaiwara Village, Chikkaballapur District, Karnataka, India

Community De-fluoridation - Experience in Kaiwara Village, Chikkaballapur District, Karnataka, India

System of Sensors and Actuators for the Production of Water Used in the Manufacture of Medicines

Bioremediation of reverse osmosis concentrate generated from the treatment of landfill leachate

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