scholarly journals Floating synthetic filtering device development for turbidity value reduction of water in Eshkakon reservoir

2020 ◽  
Vol 175 ◽  
pp. 12008
Author(s):  
Tatiana Ivankova
Keyword(s):  
Filter Design ◽  
Economic Effect ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Primary Treatment ◽  
Main Element ◽  
Labor Costs ◽  
Polypropylene Material ◽  
Pre Treatment ◽  
Water Quality Problem

This paper presents multifactorial studies to solve the improving water quality problem where effective filtering devices development is relevant. Intake filters perform primary treatment retain water suspension and debris of anthropogenic origin. Water analysis monitoring of the Eshkakon reservoir has been presented, as a result there is a need to use a filtration device to reduce its turbidity. A comparative analysis of material, construction and operating costs of various types of water intakes is given and the most economical and prospective one, composed of soft floating filtering devices made of synthetic fabrics, is identified. The main purpose of the device is to reduce “mud load”, mechanical pre-treatment of fresh water until entering a water treatment plant (WTP), water purification from plankton and suspended particles. The main element of the device is a filter wall made of flexible polypropylene material, which makes selective water intake. Advantages of the device include flexibility, high short-term and long-term strength, rot proofing; compliance of the filter design with effective fish protection devices; economic effect of advent of technology is to reduce investment in its manufacture, material consumption and labor costs in operational cycle.

Effects of pre-treatment with magnetic ion exchange resins on coagulation/flocculation process

2008 ◽  
Vol 57 (1) ◽  
pp. 57-64 ◽  
Author(s):  
B. Sani ◽  
E. Basile ◽  
C. Lubello ◽  
L. Rossi
Keyword(s):  
Ion Exchange ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Ion Exchange Resin ◽  
Test Procedures ◽  
Aggregation State ◽  
Jar Test ◽  
Pre Treatment ◽  
Magnetic Ion

A new Magnetic Ion EXchange resin for DOC (Dissolved Organic Carbon) removal (MIEX®DOC Resin) has been evaluated as water pre-treatment at the Drinking Water Treatment Plant (DWTP) of Florence in order to reduce the oxidant demand and disinfection by-products (DBPs) formation potential. This pre-treatment leads to several effects on downstream treatment processes. In this experimental study the effects of MIEX® pre-treatment on clariflocculation process were evaluated with respect to coagulant demand reduction and characteristics of flocs formed. The analysis was conducted using traditional jar test procedures and a Photometric Dispersion Analyser (PDA2000) which provided continuous information about the aggregation state of particles during the jar tests. For a fixed turbidity goal in clarified water, ion exchange pre-treatment led to coagulant dosage reduction up to 60% and PDA results shown that flocs formed in pre-treated water were bigger and more resistant to shearing effects than those formed by conventional clariflocculation.

Roughing filtration as an effective pre-treatment system for high turbidity water

2011 ◽  
Vol 64 (7) ◽  
pp. 1419-1427 ◽  
Author(s):  
Zahiruddin Khan ◽  
Rahimuddin Farooqi
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Dose Requirement ◽  
Water Turbidity ◽  
Effluent Quality ◽  
Coagulant Dosage ◽  
High Turbidity ◽  
Pre Treatment ◽  
Effective Water

Effective water treatment is the prime goal of every water treatment facility. Chakwal Water Treatment Plant in Pakistan has been treating high-turbidity surface water through crude coagulation, sedimentation and slow sand filtration since the early 1980s. The process has always been tedious in terms of high coagulant dosage, large volumes of sludge and short filter runs especially after wet spells. A laboratory-scale study was conducted to see if roughing filtration, as the pre-treatment process, would help in reducing coagulant dose and sludge volume and improving effluent quality. Results indicated that up-flow rouging filtration with media grades decreasing in the direction of flow could reduce wet weather raw water turbidity (by more than 90%) and coagulant dose. Overall, the plant could save over US $54,000 annually in terms of coagulant cost only. Longer filter runs, improved product water quality leading to lower chlorine dose requirement, would be additional benefits.

scholarly journals Configuration of a pilot station in a technological investigation of groundwater treatment

2018 ◽  
Vol 44 ◽  
pp. 00148
Author(s):  
Paweł Pruss ◽  
Alina Pruss ◽  
Małgorzata Komorowska-Kaufman
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Design Guidelines ◽  
Operating Costs ◽  
Main Element ◽  
Groundwater Treatment ◽  
Treatment Technology ◽  
Unit Process

The purpose of pre-design technological investigations is to define the water treatment technology for a new or existing water treatment plant. The investigation is performed on model-scale equipment, making sure that the results can be extrapolated to the technological scale. The investigation should allow for the determination of unit process parameters and ensure the desired outcome i.e. treated water meeting the applicable quality standards. Indirectly, the investigation results can also be used as a basis for defining the estimated scope of the investment, the costs of its execution and the future equipment operating costs. Technological investigations are carried out on the grounds of existing or future treatment plants in order to take into account the variable composition and quality indicators of the raw water to be treated. The pilot station, being the main element of the technological investigation, should be designed, built and operated with a view to the possibility of formulating further design guidelines after the study is completed. In this article, the authors share their experience related to the configuration of a pilot station used in an investigation of a groundwater treatment technology.

Prevention of Biofouling in Industrial RO Systems: Experiences with Peracetic Acid

2010 ◽  
Vol 5 (2) ◽  
Author(s):  
W.B.P. van den Broek ◽  
M.J. Boorsma ◽  
H. Huiting ◽  
M.G. Dusamos ◽  
S. van Agtmaal
Keyword(s):  
Reverse Osmosis ◽  
Peracetic Acid ◽  
Membrane Filtration ◽  
Waste Water Treatment ◽  
Stable Process ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Pre Treatment ◽  
Oxidation Damage

Biofouling is the major fouling type occurring in reverse osmosis (RO) plants treating surface water or effluent from a waste water treatment plant. Severe biofouling can result in operational problems, higher energy and chemical consumption and premature membrane replacement. There are different methods to control biofouling. One method is removal of nutrients in the pre-treatment of the membrane filtration plant, another method is periodic removal of biofouling by chemical cleanings or the use of chemicals to prevent biological growth in the RO systems. In this paper the results of experiments with peracetic acid on three different full scale plants are presented. Two of the plants are operated by Evides Industriewater, the third one by Bètawater, a subsidiary company for industry water of Waterleidingmaatschappij Drenthe (WMD). One of the main outcomes is that biofouling can be controlled fully on reverse osmosis (RO) plants with the applied method with a peracetic acid based product (Divosan Activ). If the proper measures are taken to avoid oxidation damage due to transition metals, this method with the environmental friendly product results in a stable process and savings by a significantly reduced CIP interval.

Assessment of water treatment processes: detailed organic matter characterisation and membrane fouling indices at the Loddon Water Treatment Plant, Victoria, Australia

2011 ◽  
Vol 11 (3) ◽  
pp. 274-280 ◽  
Author(s):  
C. Khorshed ◽  
S. Vigneswaran ◽  
J. Kandasamy ◽  
R. Aryal ◽  
D. Dharmapalan
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Ion Exchange ◽  
Membrane Fouling ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Treatment Methods ◽  
Wide Range ◽  
Exchange Adsorption ◽  
Pre Treatment

Recent advances in membrane technology have led to its broad application, and reverse osmosis (RO) systems now represent the fastest growing segment of the desalination market. Its performance is hindered by membrane fouling. In this study pre-treatment methods to reduce RO fouling were investigated including flocculation, adsorption and ion exchange. Detailed organic characterisations were made in terms of florescence spectroscopy excitation emission matrix (EEM), UV254 absorbance and liquid chromatography-organic carbon detection (LCOCD). The different pre-treatment methods were assessed in terms of the fouling potential. This was quantified in terms of the modified fouling index measured using a dead-end cell micro-filtration (MF) unit. The existing pre-treatment of granular activated carbon (GAC) filter led to a good organic removal. Among the pre-treatment methods tested in the laboratory, purolite ion exchange/adsorption was found to be better than FeCl3 flocculation in terms of the amount as well as the wide range of organics removal. A pre-treatment of flocculation with Poly-ferric-silicate (PFSi) as flocculent gave a higher removal of organic matter compared to other pre-treatments tested. DOC was reduced from 11.5 to 4.25 mg/L, and it removed mostly the humic type substances.

scholarly journals An investigation into a treatment strategy for the Berg River water at the Voëlvlei water treatment plant

2012 ◽  
Vol 12 (1) ◽  
pp. 56-64
Author(s):  
R. J. Swarts ◽  
J. J. Schoeman
Keyword(s):  
Water Treatment ◽  
River Water ◽  
Treatment Strategy ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Raw Water ◽  
Ferric Sulphate ◽  
Aluminium Sulphate ◽  
Pre Treatment ◽  
Ph Range

The main aim of this study was to determine a treatment strategy for the Berg River water at the Voëlvlei water treatment plant (WTP). Jar tests were conducted using ferric and aluminium sulphate as coagulants to determine the optimum treatment parameters of the Berg River water and the Voëlvlei WTP raw water. The results for the Voëlvlei WTP raw water and the Berg River water with ferric sulphate as the coagulant showed an optimum Fe3+ dosage of 3.0–4.0 mg/L and 4.0–6.0 mg/L, respectively, with an optimum coagulation pH range of 6.6–9.5 and 5.0–10.0, respectively. The results with aluminium sulphate as the coagulant showed an optimum Al3+ dosage of 2.5–3.0 mg/L and 4.0–5.0 mg/L, respectively, with an optimum coagulation pH of 6.0–7.0 and 6.0, respectively. This study concluded that the Berg River water cannot be effectively treated at the Voëlvlei WTP using the plants treatment parameters, even if it is blended with the Voëlvlei WTP raw water. The best treatment strategy for the Berg River water would be pre-treatment using either ferric sulphate or the MIEX® resin on its own, or in conjunction with one another.

Behaviour of pharmaceuticals and personal care products in a sewage treatment plant of northwest Spain

2005 ◽  
Vol 52 (8) ◽  
pp. 29-35 ◽  
Author(s):  
M. Carballa ◽  
F. Omil ◽  
J.M. Lema ◽  
M. Llompart ◽  
C. García ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Primary Treatment ◽  
Municipal Sewage ◽  
Conventional Activated Sludge ◽  
Natural Estrogens ◽  
Pre Treatment ◽  
Acidic Compounds

Thirteen pharmaceutical and cosmetic compounds have been surveyed along the different units of a municipal sewage treatment plant (STP) to study their fate across each step and the overall removal efficiency. The STP studied corresponds to a population of approximately 100,000 inhabitants located in Galicia (northwest Spain), including three main sections: pre-treatment (coarse and fine screening, grit and fat removal); primary treatment (sedimentation tanks); and secondary treatment (conventional activated sludge). Among all the substances considered (galaxolide, tonalide, carbamazepine, diazepam, diclofenac, ibuprofen, naproxen, estrone, estradiol, ethinylestradiol, roxitromycin, sulfamethoxazole and iopromide), only significant concentrations were found for two musks (galaxolide and tonalide), two antiphlogistics (ibuprofen and naproxen), two natural estrogens (estrone, estradiol), one antibiotic (sulfamethoxazole) and the X-ray contrast media (iopromide), being the other compounds below the quantification level. In the primary treatment, only the fragrances were partly removed, with efficiencies of 20–50% for galaxolide and tonalide. However, the aerobic treatment caused an important reduction in all compounds detected, between 35 and 75%, with the exception of iopromide. The overall removal efficiency of the STP ranged between 70 and 90% for the fragrances, 45 and 70% for the acidic compounds, around 67% for estradiol and 57% for the antibiotic sulfamethoxazole.

Consideration of DAF retrofit to a large conventional water treatment plant

1995 ◽  
Vol 31 (3-4) ◽  
pp. 93-101
Author(s):  
B. C. Vallance ◽  
R. G. Pritchard ◽  
E. E. Hargesheimer ◽  
R. T. Seidner
Keyword(s):  
Distribution System ◽  
Pilot Plant ◽  
Conceptual Development ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Operating Conditions ◽  
Nutrient Loads ◽  
Dissolved Air Flotation ◽  
Filter Performance ◽  
Pre Treatment

Recent historical trends have shown a deterioration of raw water quality feeding the 60 year old Glenmore WTP. This deterioration has manifested itself in a chronic increase in nutrient loads and consequent chlorine demand. The plant's existing pre-treatment and sedimentation facilities have had difficulty in handling flash turbidity spikes. Lack of contact time for post chlorination has created a reliance on high pre-chlorination practice to ensure a safe distribution system disinfectant residual. These trends, together with the regulatory authority's tightening of compliance standards and enforcement policies, plus growing public expectations for consistently high quality drinking water, pointed towards a need for a comprehensive assessment of the plant. The City of Calgary, with its Engineering Consultant, embarked on a programme to review the existing plant facilities; identify alternatives with potential for addressing known concerns; and pilot both conventional and advanced treatment processes side by side, to establish relative and definitive performance data. This paper addresses the piloting aspect of the study programme, and in particular, the rationale for piloting dissolved air flotation (DAF). Conceptual development, design and construction of the pilot plant are all discussed. The conceptual development was based on the needs and design constraints imposed by the existing plant, such as hydraulic profile. The approach to design was predicated by a desire for a pilot plant that would provide not only guidance for the plant upgrade, but also a working tool for future studies, process monitoring and optimization. The construction and commissioning was planned with a view to having the pilot plant operational in time for spring run-off. Some of the operational experiences with the pilot plant are discussed. These included modifications to the DAF baffle weir; the collection, display, manipulation and graphing of data from online monitors; filter performance following DAF pre-treatment, and the establishment of a successful set of operating conditions.

Constructed Wetland Series Process for Pretreatment Raw Water of Drinking Water Treatment Plant

2011 ◽  
Vol 183-185 ◽  
pp. 625-629 ◽  
Author(s):  
Xu Yang ◽  
Wen Xin Shi ◽  
Wen Zhe Li ◽  
Lu He Wan ◽  
Xiao Ju Yan ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Constructed Wetland ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Raw Water ◽  
Drinking Water Treatment Plant ◽  
Wetland System ◽  
Pre Treatment

In order to investigate the feasibility of pre-treatment of drinking water treatment plant by the constructed wetland and provide the operation parameters for a full scale constructed wetland to improve the quality of raw water. The constructed wetland series process was used to pre-treat influent water of drinking water treatment plant based on raw water of the Song hua jiang River. The results showed that when the influent flux was 1m3/d, the average removal rates of Turbidity, COD, TN and NH4+-N in the constructed wetland system were 94.27%, 56.77%, 2.37% and 55.65% , respectively. The wetland system has high treatment effect and run stably in the pretreatment process of the raw water. This system could lighten the load of the conventional water treatment processes effectively.

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