Removal of organic carbon in source water and stability analysis of the finished water quality in water treatment plant using biological activated car13on

When purifying water for potable use, wastewater is generated, due to the class of the water treatment plant and the quality of the source water. Midvaal Water Company recycled wastewater that included residue from the dissolved air flotation (DAF), sedimentation and filtration processes in an attempt to save water and reduce costs. The aim of this study was to determine functionality and water quality of such a wastewater recycling system. Samples were collected for analysis, at the sections that contributed to the total wastewater system as well as after various treatment processes. The water quality of these samples was determined, as well as the incidences of water quality failures of the final water, to establish whether the recycle stream that enters the plant together with the source water had any impact on the water quality after the different treatment processes. Data were grouped into periods prior to, during and after recycling to enable comparisons. The water quality of the recycle stream was poorer than that of the source water from the Vaal River with regard to the mean values for total chlorophyll, suspended solids, turbidity and dissolved organic carbon, but the sedimentation process of the wastewater system improved the wastewater quality by drastically reducing total chlorophyll, suspended solids and turbidity. The risk-defined compliance for the final water was excellent (≥95%), despite aluminium, turbidity and total chlorophyll failures of the final water quality during the recycling period. Total chlorophyll was identified as the largest risk during wastewater recycling, especially after the filtration process. It is evident from the data that wastewater recycling, which included wastewater from the DAF, into the main inlet stream of the water treatment plant proved to be effective, based on compliance with national legislation, and had no detrimental impact on overall treatment processes or final water quality.

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N-Nitrosodimethylamine Formation from Treatment of Seasonally and Spatially Varying Source Water

Water ◽

10.3390/w11102019 ◽

2019 ◽

Vol 11 (10) ◽

pp. 2019

Author(s):

Maxwell C. Meadows ◽

Soni M. Pradhanang ◽

Takahiro Fujioka ◽

Hitoshi Kodamatani ◽

Menu B. Leddy ◽

...

Keyword(s):

Water Treatment ◽

Treatment Plant ◽

Treatment Strategies ◽

Water Treatment Plant ◽

Current Treatment ◽

Additional Treatment ◽

Water Type ◽

Source Water ◽

Treatment Techniques ◽

Spatially Varying

N-nitrosodimethylamine (NDMA) is a disinfection by-product (DBP) that has been classified as a probable human carcinogen in multiple risk assessments. NDMA presence in drinking water is widespread and dependent on source water, disinfectant type, precursors, and water treatment strategies. The objectives of this study were to investigate NDMA formation potential in a modeled monochloramine water treatment plant (WTP) fed by seasonally and spatially varying source water; and to optimize DBP precursor removal by combining conventional and additional treatment techniques. After NDMA analysis, it was found that NDMA formation was significantly dependent on source water type and monochloramine contact time (CT); e.g., at 24 h CT, Cork Brook produced 12.2 ng/L NDMA and Bailey Brook produced 4.2 ng/L NDMA, compared with 72 h CT, Cork Brook produced 4.1 ng/L NDMA and Bailey Brook produced 3.4 ng/L NDMA. No correlations were found between traditional DBP precursors such as total organic carbon and total nitrogen, and the formation of NDMA. The laboratory bench-top treatment system was highly effective at removing traditional DBP precursors, highlighting the need for WTPs to alter their current treatment methods to best accommodate the complex system of DBP control.

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Evaluating the Impacts of Integrated Pollution on Water Quality of the Trans-Boundary Neris (Viliya) River

Sustainability ◽

10.3390/su10114239 ◽

2018 ◽

Vol 10 (11) ◽

pp. 4239 ◽

Cited By ~ 7

Author(s):

Marina Valentukevičienė ◽

Lina Bagdžiūnaitė-Litvinaitienė ◽

Viktoras Chadyšas ◽

Andrius Litvinaitis

Keyword(s):

Water Quality ◽

Water Treatment ◽

Technological Development ◽

Treatment Plant ◽

Water Treatment Plant ◽

Suspended Solid ◽

Storm Water ◽

Boundary Area ◽

Water Flows

The trans-boundary area between the Europe Union and other countries is highly susceptible to changes in water quality and variations in the potential pollution load that could influence its eco-systems significantly. The Neris (Viliya) River is one of the biggest surface water bodies in Lithuania and Belarus with an ecologically important area protected by international legislation. The study was aimed at evaluating the impacts of integrated pollution on water quality of the Neris River taking into account different storm-water flows and ecological scenarios. For this purpose, qualitative and quantitative statistical evaluation was set up and calculation was done; different integrated pollution loads of the catchment area were estimated. The evaluation considered a decrease in river discharge due to changes in the regional storm-water flow and technological development that should lead to the growing covered surface and a reduction in the untreated storm-water flows. The obtained results indicated that, in the case of storm-water treatment, the total nitrate and phosphate concentrations will decrease, while in the cases of changes in combined suspended solid, the concentration of nutrients will decrease. Thus, a trans-boundary storm-water treatment plant of the Viliya River is required as it should eliminate pollution accumulation and restore its acceptable environmental status. A coordinated international project for the entire catchment of the Neris (Viliya) River based on the specifications and requirements of the EU Water Framework Directive (EU 2000) should be developed and implemented. Subsequently, ecological river-use policies should be established at the international level, which should offer considerable perspectives for the sustainable development of the area.

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A Preliminary Investigation of Total Organic Carbon Variation in Influent and Effluent of Isfahan (Iran) Water Treatment Plant, Urban Network and Fellman Wells

Annali di Chimica ◽

10.1002/adic.200690041 ◽

2006 ◽

Vol 96 (7-8) ◽

pp. 389-398

Author(s):

Karim Movassaghi ◽

Zahra Hemmatian ◽

Behrouz Akbari-Adergani ◽

Giovanni Palmisano

Keyword(s):

Water Treatment ◽

Organic Carbon ◽

Total Organic Carbon ◽

Preliminary Investigation ◽

Treatment Plant ◽

Water Treatment Plant ◽

Urban Network

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Online flow cytometric monitoring of microbial water quality in a full-scale water treatment plant

npj Clean Water ◽

10.1038/s41545-018-0017-7 ◽

2018 ◽

Vol 1 (1) ◽

Cited By ~ 18

Author(s):

Benjamin Buysschaert ◽

Lotte Vermijs ◽

Agathi Naka ◽

Nico Boon ◽

Bart De Gusseme

Keyword(s):

Water Quality ◽

Water Treatment ◽

Treatment Plant ◽

Water Treatment Plant ◽

Full Scale ◽

Microbial Water Quality ◽

Flow Cytometric

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Chemical monitoring strategy for the assessment of advanced water treatment plant performance

Water Science & Technology Water Supply ◽

10.2166/ws.2010.635 ◽

2010 ◽

Vol 10 (6) ◽

pp. 961-968 ◽

Cited By ~ 2

Author(s):

J. E. Drewes ◽

J. A. McDonald ◽

T. Trinh ◽

M. V. Storey ◽

S. J. Khan

Keyword(s):

Water Quality ◽

Water Treatment ◽

Reverse Osmosis ◽

Pilot Plant ◽

Monitoring Program ◽

Treatment Plant ◽

Water Treatment Plant ◽

Pilot Scale ◽

Chemical Monitoring ◽

Plant Operation

A pilot-scale plant was employed to validate the performance of a proposed full-scale advanced water treatment plant (AWTP) in Sydney, Australia. The primary aim of this study was to develop a chemical monitoring program that can demonstrate proper plant operation resulting in the removal of priority chemical constituents in the product water. The feed water quality to the pilot plant was tertiary-treated effluent from a wastewater treatment plant. The unit processes of the AWTP were comprised of an integrated membrane system (ultrafiltration, reverse osmosis) followed by final chlorination generating a water quality that does not present a source of human or environmental health concern. The chemical monitoring program was undertaken over 6 weeks during pilot plant operation and involved the quantitative analysis of pharmaceuticals and personal care products, steroidal hormones, industrial chemicals, pesticides, N-nitrosamines and halomethanes. The first phase consisted of baseline monitoring of target compounds to quantify influent concentrations in feed waters to the plant. This was followed by a period of validation monitoring utilising indicator chemicals and surrogate measures suitable to assess proper process performance at various stages of the AWTP. This effort was supported by challenge testing experiments to further validate removal of a series of indicator chemicals by reverse osmosis. This pilot-scale study demonstrated a simplified analytical approach that can be employed to assure proper operation of advanced water treatment processes and the absence of trace organic chemicals.

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Trihalomethane precursor reactivity changes in drinking water treatment unit processes during a storm event

Water Science & Technology Water Supply ◽

10.2166/ws.2019.089 ◽

2019 ◽

Vol 19 (7) ◽

pp. 2098-2106

Author(s):

Chelsea W. Neil ◽

Yingying Zhao ◽

Amy Zhao ◽

Jill Neal ◽

Maria Meyer ◽

...

Keyword(s):

Water Quality ◽

Drinking Water ◽

Water Treatment ◽

Treatment Plant ◽

Drinking Water Treatment ◽

Plant Performance ◽

Storm Event ◽

Source Water ◽

Treatment Unit ◽

Source Water Quality

Abstract Source water quality can significantly impact the efficacy of water treatment unit processes and the formation of chlorinated and brominated trihalomethanes (THMs). Current water treatment plant performance models may not accurately capture how source water quality variations, such as organic matter variability, can impact treatment unit processes. To investigate these impacts, a field study was conducted wherein water samples were collected along the treatment train for 72 hours during a storm event. Systematic sampling and detailed analyses of water quality parameters, including non-purgeable organic carbon (NPOC), UV absorbance, and THM concentrations, as well as chlorine spiking experiments, reveal how the THM formation potential changes in response to treatment unit processes. Results show that the NPOC remaining after treatment has an increased reactivity towards forming THMs, and that brominated THMs form more readily than chlorinated counterparts in a competitive reaction. Thus both the reactivity and quantity of THM precursors must be considered to maintain compliance with drinking water standards, a finding that should be incorporated into the development of model-assisted treatment operation and optimization. Advanced granular activated carbon (GAC) treatment beyond conventional coagulation–flocculation–sedimentation processes may also be necessary to remove the surge loading of THM-formation precursors during a storm event.

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Specific Fluorescent Fingerprint of Organic Matter in Advanced Water Treatment and its Molecular Weight

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.317 ◽

2013 ◽

Vol 448-453 ◽

pp. 317-321 ◽

Cited By ~ 1

Author(s):

Jing Wen Cao ◽

Shao Wei Liao ◽

Chung Yi Chung ◽

Hwa Sheng Gau ◽

Chun Yen Chiu ◽

...

Keyword(s):

Molecular Weight ◽

Organic Matter ◽

Water Treatment ◽

High Performance ◽

Treatment Plant ◽

Water Treatment Plant ◽

Excitation Wavelength ◽

Source Water ◽

Fluorescent Intensity ◽

Treated Water

In this research, the UV absorbance values of wavelength at 210 and 254 nm, excitation emission fluorescent matrix were measured for source water and treated water in CCL (Cheng Ching Lake) water treatment plant during five months. The whole data produced from EEFM was analyzed by PARAFAC operated in MATLAB software. The variation of molecular weight for organic matter was measured by HPLC (high performance liquid chromatography) with UV and fluorescent detectors. Observed from the variation of UV210/UV254, high value in treated water compared with source water was found. More molecular weight less than 5 k Da was formed in the treated water with relative to source water. Also, both major components in source water were located at wavelengths of excitation/emission of 250/410 nm and 230/330 nm and those in treated water were 240/410 nm and 220/290 nm. Also, the fluorescent intensity, long excitation wavelength was higher than short excitation wavelength in source water. This phenomena was opposite with treated water.

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