scholarly journals Energy and Chemicals Consumption Evaluation in Water Treatment Plant. A comparative study between Bacau and Turin

2019 ◽  
Vol 70 (3) ◽  
pp. 881-886
Author(s):  
Florina Fabian ◽  
Valentin Nedeff ◽  
Narcis Birsan ◽  
Emilian Mosnegutu
Keyword(s):  
Water Treatment ◽  
Total Energy ◽  
Energy Demand ◽  
Treatment Process ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Winter Period ◽  
Raw Water ◽  
Water Turbidity ◽  
Water Treatment Process

The total energy demand of water treatment plant Bacau (WTP Bacau) was evaluated at 239.94 MW h/y, in case of SMAT (Turin-Iataly) total energy demand of the plant was evaluated at 2.235,454.9 MW h/y, and 6,9 % is for WT. Chemicals consumption, is relative and depends on raw water turbidity at WTP Bacau, during the winter period raw water is very clean and requires only a simple chlorination, on the other hand at SMAT chemicals consumption, is 5.325 t/y and 8.8% is used for water treatment process.

Monitoring of iodine species during water purification at a public water treatment plant in Japan

2018 ◽  
Vol 19 (2) ◽  
pp. 580-587
Author(s):  
Sho Nishida ◽  
Maki Asami ◽  
Naoya Ohata ◽  
Jun Horigome ◽  
Naoki Furuta
Keyword(s):  
Water Treatment ◽  
Humic Substances ◽  
Treatment Process ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Size Exclusion ◽  
Ozone Treatment ◽  
Raw Water ◽  
Iodine Species ◽  
Water Treatment Process

Abstract Iodine is an essential element for humans; however, it can be toxic depending on its chemical form. A variety of toxic and non-toxic iodine species have been identified in environmental water and in the drinking water produced by public water treatment plants. Here, we examined the change of iodine species during the water treatment process at a public water treatment plant in Japan. Samples of raw water and of treated water immediately after each of eight treatment stages comprising the treatment process were collected, and a speciation analysis was conducted by means of ion chromatography– and size-exclusion chromatography–inductively coupled plasma mass spectrometry. In the raw water, iodine was found mainly as iodide or iodinated humic substances that were ultimately oxidized and transformed into iodate, a form non-toxic to humans, by two independent oxidation stages in the water treatment process – ozone treatment and chlorine treatment. No disinfection byproducts were detected at any stage of the treatment process. Fluorescence spectrometry with multivariate analysis revealed that humic substances were markedly decreased by ozone treatment, but not by chlorine treatment. The present results show that, at the plant-scale, ozone treatment is an effective means of removing toxic iodine species from raw water.

scholarly journals Using sulfuric acid (H2SO4) for pH adjustment in water treatment

2021 ◽  
Vol 11 (3) ◽  
pp. 19-27
Author(s):  
Ali Salim Abd Al-Hussein
Keyword(s):  
Sulfuric Acid ◽  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Strong Acid ◽  
Raw Water ◽  
Water Turbidity ◽  
Ph Adjustment ◽  
Oil Company ◽  
Clarified Water

The aim of this paper is to explain the advantages of using sulfuric acid in Qarmat Ali water treatment plant belong to Basrah Oil Company, which produces water for injection into the Rumaila reservoirs. Sulfuric acid is a strong acid providing rapid and effective pH reduction. Maintaining the coagulation pH within the optimum value (6.4) by inject specific value of sulfuric acid to RAW water enhances the clarification performances by reducing the clarified water turbidity to minimum value (5.1). It was preferable for  operating at a pH below the saturation pH to prevent the precipitation of minerals such as calcium carbonate which are contributing to blocking the surface filters installed downstream (auto back wash filters) and The clarifiers that cause increased the feed from 500 MBD  to 1000 MBD. With a fast and rapid dissociation in Water, Sulfuric acid is an effective and practical way to lower the pH on Qarmat Ali plant which producing in excess of 1,000MBD of export water.

scholarly journals Effect of water treatment process on organochlorine pesticide residue levels in Ahvaz water treatment plant 2

2017 ◽  
Vol 7 (4) ◽  
pp. 349-352
Author(s):  
Saeed Samani Majd ◽  
Mohammad Hassan Rabie Rad ◽  
Zahra Nazari ◽  
Abdolazim Behfar ◽  
Gholamreza Reissi ◽  
...  
Keyword(s):  
Water Treatment ◽  
Organochlorine Pesticides ◽  
Treatment Process ◽  
Total Concentration ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Organochlorine Pesticide Residue ◽  
Solvent Mixtures ◽  
Water Treatment Process ◽  
Rotary Vacuum

One of the main hazards of human life and health is the presence of pesticides in the aquatic system is. The Karun River is the surface water source in the preparation of drinking water for the city of Ahvaz city at the Ahvaz Water Treatment Plant (AWTP) #2. This study was done in order to investigate the statue of qualification and the quantification of the contamination of water entering into (AWTP #2) by selected organochlorine pesticides [(α, β, γ, δ )HCH, heptachlor, alderin, dielderin, (op’ , pp’ ) DDT, (α, β) endosulfan and metoxychlor], plus the water treatment effects on these pesticide residues removal. For this purpose, one composite sample from each of the water treatment process steps was taken monthly which was comprised of 20 grab samples in 2008. Water samples were acidified to pH < 2, extracted three times with n-hexane, and concentrated using a rotary vacuum evaporator for Florisil column chromatography cleanup and fractioned by elution with three different solvent mixtures of petroleum and diethyl ether. Finally, the elutes were concentrated to dryness using rotary vacuum evaporator and then the residues were dissolved in hexane and analyzed by GC- μECD. All 12 investigated organochlorine pesticides were detected. Results of this study indicated that concentration of investigated pesticides decreased (according to the kind of pesticide) by 20% to 80% and the mean of total concentration was reduced by 49% during water treatment process steps. There was a significant positive correlation (r=97.75%) between variation in the concentration of poisons and the total organic matter (KMnO4 value).

scholarly journals Characterization of dissolved organic matter at a water treatment plant with closed systems in different seasons

2020 ◽  
Vol 20 (5) ◽  
pp. 2013-2020
Author(s):  
Hudori Hudori ◽  
Toshiro Yamada ◽  
Yukitaka Suzuki ◽  
Maulana Yusup Rosadi ◽  
Hiroto Tamaoki ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Organic Matter ◽  
Water Treatment ◽  
Dissolved Organic Matter ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Raw Water ◽  
Recycled Water ◽  
Water Treatment Process ◽  
Closed Systems

Abstract This research focuses on characterizing the dissolved organic matter found at water treatment plants with closed systems. Recycled water generated as a by-product of water treatment is added to raw water in those systems. The dissolved organic matter in the raw water was found to be higher in summer than in winter, but the water treatment process was able to produce purified water of the similar quality in both seasons. The recycled water contained mostly low molecular weight and protein-like substances, and this composition was different from that of the raw water, which mainly contained humic-like substances. The recycled water did not influence the concentration of humic-like substances or the molecular weight distribution in the influent water.

scholarly journals Intelligent system for improving dosage control

2017 ◽  
Vol 39 (1) ◽  
pp. 33 ◽  
Author(s):  
Fabio Cosme Rodrigues dos Santos ◽  
André Felipe Henriques Librantz ◽  
Cleber Gustavo Dias ◽  
Sheila Gozzo Rodrigues
Keyword(s):  
Neural Network ◽  
Water Treatment ◽  
Intelligent System ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Test Method ◽  
Raw Water ◽  
Water Turbidity ◽  
Coagulant Dosage

Coagulation is one of the most important processes in a drinking-water treatment plant, and it is applied to destabilize impurities in water for the subsequent flocculation stage. Several techniques are currently used in the water industry to determine the best dosage of the coagulant, such as the jar-test method, zeta potential measurements, artificial intelligence methods, comprising neural networks, fuzzy and expert systems, and the combination of the above-mentioned techniques to help operators and engineers in the water treatment process. Current paper presents an artificial neural network approach to evaluate optimum coagulant dosage for various scenarios in raw water quality, using parameters such as raw water color, raw water turbidity, clarified and filtered water turbidity and a calculated Dose Rate to provide the best performance in the filtration process. Another feature in current approach is the use of a backpropagation neural network method to estimate the best coagulant dosage simultaneously at two points of the water treatment plant. Simulation results were compared to the current dosage rate and showed that the proposed system may reduce costs of raw material in water treatment plant. 

Removal of DOM and THM formation potential of tropical surface water by ceramic microfiltration

2012 ◽  
Vol 12 (6) ◽  
pp. 869-877 ◽  
Author(s):  
A. Abeynayaka ◽  
C. Visvanathan ◽  
N. Monthakanti ◽  
T. Hashimoto ◽  
H. Katayama
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Pilot Scale ◽  
Operating Conditions ◽  
Membrane Properties ◽  
Raw Water ◽  
Formation Potential ◽  
Trihalomethane Formation Potential ◽  
Water Treatment Process

Dissolved organic matter (DOM) and trihalomethane formation potential (THMFP) removal by ceramic microfiltration (CMF) under different operating conditions was investigated and compared with the performance of a conventional water treatment plant at Bangkhen, Thailand. The tropical surface raw water for all the experiments was taken from Chaophraya River, Bangkok, Thailand. CMF studies were conducted with both pilot scale (Pilot-CMF) and laboratory scale (Lab-CMF) units. Observations indicate that the properties of raw water such as dissolved organic carbon (DOC) concentration and specific ultraviolet absorbance (SUVA) vary with time. Under these varying raw water conditions, the conventional water treatment process demonstrates varying THMFP removals. The Pilot-CMF provides better and steady THMFP removals compared to conventional process. Bangkhen water treatment plant (BWTP) filtrate SUVA (2.01 ± 1.07) and Pilot-CMF filtrate SUVA (3.22 ± 0.98) were significantly lower compared to raw water SUVA (4.79 ± 1.39). This SUVA reduction indicated a higher removal of aromatic DOMs through both treatment processes. Pilot-CMF manifest a grater removal of hydrophilic DOM compared to filtrate from BWTP. This corresponds to a higher reduction of THMFP by Pilot-CMF over BWTP. It was found that higher removal of DOC by Pilot-CMF is associated with coagulation process, effects of suspended solids and membrane properties.

Investigation of the Treatment Processes Effectiveness of the Surface Water at the Pilot Station and in a Technical Scale

2009 ◽  
Vol 4 (2) ◽  
Author(s):  
Adam Rak
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Active Carbon ◽  
Treatment Process ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Technology System ◽  
Water Treatment Process ◽  
Technology Systems

The article focuses on both results of analysing the quality of the surface water taken from the reservoir and effectiveness of the water treatment process' technological examinations carried out both on a pilot station and in a technical scale. The research was carried out on the basis of the water taken from the reservoir named “Sosnowka” which is located at the Karkonosze mountain range bottom. There were 27 physical and chemical factors that underwent the examination. The effectiveness of the water treatment process was assessed basing on such factors as follows colour reduction, turbidity and such indicators as: alkalinity, total hardness, oxidability and conductivity. The 1st stage carried out throughout the water year included examining of the water treatment process' effectiveness in a pilot station in various technology systems by means of such unitary process as: sieving, pre-ozonation, pH correction, coagulation, filtration on anthracite and sand bed, final ozonation and sorption on active carbon. The other stage concerned examination carried out in a technology system in a technical scale of a new water treatment plant. The good quality of the examined water at that time (pH = 6,9; colour = 15 mgPt/L-1) allowed for using a simple technology system with the use of such processes as: sieving, pre-ozonation, filtration on anthracite and sand bed, final ozonation and sorption on active carbon and final correction of the water quality with Na2CO3 and MgCl2. The results aquired while carrying out laboratory technological examinations and those in technical scale allowed for establishing 3 optimal technology systems to be implemented while the water treatment plant operates.

Cost-effective water treatment of polluted surface water by using direct filtration and granular activated carbon filtration

2002 ◽  
Vol 2 (1) ◽  
pp. 233-240 ◽  
Author(s):  
J. Cromphout ◽  
W. Rougge
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Treatment Process ◽  
Treatment Plant ◽  
Granular Activated Carbon ◽  
Cost Effective ◽  
Water Treatment Plant ◽  
Direct Filtration ◽  
Carbon Filtration ◽  
Effective Water

In Harelbeke a Water Treatment Plant with a capacity of 15,000 m3/day, using Schelde river water has been in operation since April 1995. The treatment process comprises nitrification, dephosphatation by direct filtration, storage into a reservoir, direct filtration, granular activated carbon filtration and disinfection. The design of the three-layer direct filters was based on pilot experiments. The performance of the plant during the five years of operation is discussed. It was found that the removal of atrazin by activated carbon depends on the water temperature.

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