scholarly journals The Use of Effective Coagulants and Flocculants to Intensify the Process of Water Purification at Coke Plants

2019 ◽  
Vol 27 (2) ◽  
pp. 21-28 ◽  
Author(s):  
Olena Galkina ◽  
Halyna Blahodarna
Keyword(s):  
Water Purification ◽  
Coke Plant ◽  
Industry Standards ◽  
Coke Plants ◽  
Suspended Substances ◽  
Phenolic Wastewater ◽  
Filtration Unit ◽  
Corrosive Activity ◽  
High Degree ◽  
Clarified Water

AbstractThe paper proposes a reagent method of water purification at the Kharkiv Coke Plant when using the phenolic wastewater in the water-circulating system, which corresponds to industry standards, together with coagulant (aluminum sulfate, aluminum hydroxychloride Pro-AQUA-18) and flocculant treatment (Extraflock and Besfloc). The use of cationic flocculants in water treatment has shown a high degree of efficiency in the removal of suspended substances compared with the Pro-AQUA-18 coagulant at a dose of 50 mg/dm3 or flocculant – 2-4 mg/dm3; it does not lead to the secondary pollution of the water and does not increase its corrosive activity. The purification of the clarified water was carried out using a filtration unit with a filtering load from a layer of quartz sand. The use of the proposed reagent method of water purification will allow it to be used for the technical purposes of the enterprise, reduce the consumption of fresh water, and eliminate the discharge of phenolic wastewater into the municipal sewer network.

scholarly journals WATER BALANCE AT PLANTS IN TECHNOLOGICAL SOLUTIONS ENGINEERING

2020 ◽  
Vol 1 (154) ◽  
pp. 148-153
Author(s):  
О. Galkina ◽  
М. Degtyar
Keyword(s):  
Water Management ◽  
Water Balance ◽  
Water Loss ◽  
Coke Plant ◽  
Water Circulation ◽  
Chemical Plants ◽  
Water Losses ◽  
Coke Plants ◽  
Phenolic Water ◽  
Phenolic Wastewater

In this paper questions and conditions of water management in the water-circulation systems taking into account water losses on the example of the coke-chemical plant are considered. The water balance of the primary gas refrigerators cycle at the Kharkiv coke plant has been calculated and compiled, taking into account the proposed technological solutions. As a result of the operation of the water-circulation systems, it was found that the water loss for evaporation at the Kharkiv Coke Plant is on average 2% in winter and 3% in summer. Water losses in the system are replenished with fresh technical water and purified phenolic wastewater. Technical appraisal of the work of heat-exchange equipment at coke plants is carried out consists of replacing part of fresh technical water with phenolic wastewater and minimizing wastewater discharges. The purpose of the project is to create conditions for the water re-use by coke-chemical plants and to predict its water balance depending on the technological decisions made. Thus, the purge of the system is 5.6 m3/hour, while the total irreparable water loss in the system is 9.4 m3/hour. In the article it is established that the application of the proposed technical solutions allows to reduce the amount of discharge of sewage into urban sewer network at 36 000 m3/year and consumption of fresh industrial water to 52 000 m3/year, and increase the service life of equipment from 6.5 to 8 years. These measures help to improve water and environmental situation, effective water management of the coke-plant, that is, to decrease the payment made for consumption of water resources and sewage plant. The presented water balance and calculations of losses of water in the reverse water supply system of the enterprise are executed prove positive effect from the proposed technology solutions. Keywords: phenolic water-circulation systems, coke plants, water management, water balance

Enhancement of Efficiency of the Ural Region Surface Water Sources Water Treatment in Terms of Metal Ions and their Compounds

2012 ◽  
pp. 96-108
Author(s):  
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Metal Ions ◽  
Water Purification ◽  
Solid Phase ◽  
Ural Region ◽  
Iron Aluminum ◽  
High Degree ◽  
Water Hydrogen ◽  
Sorption Characteristics

Sorption characteristics of “Ekozol-401” high-dispersed solid-phase agent in water solutions containing ions of iron, aluminum and manganese have been studied. Influence of the sorbent content, extracted metals’ concentration, saline background, hardness and alkalinity, water hydrogen indicator value as well as amount of modifier contained in the solid-phase agent have been stated. High degree of water purification in terms of the said ions has been demonstrated.

ORGANIC SORPTION-MEMBRANE TECHNOLOGY OF DON WATERS CLEAN

2016 ◽  
Vol 6 (2) ◽  
pp. 23-26
Author(s):  
Aleksey I. VERGUNOV
Keyword(s):  
Drinking Water ◽  
Water Purification ◽  
Natural Water ◽  
Membrane Reactor ◽  
Membrane Technology ◽  
Organic Substances ◽  
One Year ◽  
High Degree ◽  
Brominated Compounds ◽  
Pilot Tests

Within one year on the water of the river Don were conducted pilot tests of bio-sorptional-membrane installation, allowing to reduce the content of organic substances in drinking water. Thus, reducing the efficiency of COD concentration in the bio-sorptional-membrane reactor averaged 44.8%, the chroma - 59.1%, permanganate oxidation - 31.2%. The high degree of water purification has been obtained and turbidity was 95-96%. The results showed that the bio-sorptional membrane technology is a promising way to improve the process of natural water purification, in particular, to prevent the formation of chlorinated and brominated compounds in the chlorination of water.

scholarly journals Synthetic Characterization of Cellulose from Moringa oleifera seeds and Potential Application in Water Purification

2021 ◽  
Author(s):  
A. F. Afolabi ◽  
S. S. Oluyamo ◽  
I. A. Fuwape
Keyword(s):  
Water Purification ◽  
Moringa Oleifera ◽  
Crystallinity Index ◽  
Degree Of Crystallinity ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
Bond Stretching ◽  
Stretching Vibration ◽  
High Degree

The use of Moringa oleifera seeds for purifying water has been attempted locally in various forms without putting scientific potency of the material into consideration. The cellulose sample isolated from Moringa {oleifera} seed was characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). The value of the crystallinity index (CIr ) from the XRD pattern is 63.1%. The high degree of crystallinity obtained is attributed to the high percentage of crystallinity index, CIr (i.e. 63.1%). The morphology revealed aggregates of conical and needle-like structure. The FTIR revealed O-H stretching, C-H stretching vibration, and C=O bond stretching functional groups. These characteristics are indicative of the potential of the material in water purification.

Portable and efficient graphene-oxide based multistage filtration unit for water purification

2020 ◽  
Vol 26 ◽  
pp. 2344-2350
Author(s):  
P. Akshay ◽  
S. Shreekanth ◽  
R. Rajesh ◽  
Geena Prasad
Keyword(s):  
Graphene Oxide ◽  
Water Purification ◽  
Filtration Unit

A novel system for the abatement of fugitive emissions during charging in a by-product coke oven

2019 ◽  
Vol 116 (4) ◽  
pp. 406
Author(s):  
Marco Boscolo ◽  
Elio Padoano ◽  
Luigi Bregant ◽  
Vincenzo Dimastromatteo ◽  
Marzio Piller ◽  
...  
Keyword(s):  
Aromatic Compounds ◽  
Coke Plant ◽  
Coke Oven ◽  
Polycyclic Aromatic Compounds ◽  
Monitoring Programme ◽  
Fugitive Emissions ◽  
Legal Limits ◽  
Coke Plants ◽  
Emission Time ◽  
Polycyclic Aromatic

The article presents a study on the measures adopted in an existing coke plant in order to reduce levels of benzo(a)pyrene dispersed in the environment surrounding the facility. The area has been affected by significant levels of pollution from polycyclic aromatic compounds due to the fugitive emissions from the coke oven, which did not comply with the most recent regulation. A monitoring programme was therefore launched in order to support a framework for intervention. Several problems with the battery made it necessary to implement a novel system to collect and abate fugitive emissions during the operations. The monitoring of the fugitive emissions from the coke oven, before, during and after the implementation of the system, has shown a drop of the visible emission time at charging below 30 s, matched by the return of pollution from benzo(a)pyrene in the area below the legal limits (1 ng/Nm3). When compared to the installation costs, these results suggest that the proposed solution can be replicated in other existing by-product coke plants.

scholarly journals INVESTIGATION ON DOWNSTREAM PROCESSING OF INDUSTRIAL SCALE OF FLEXIRUBIN PRODUCTION USING SUPERPRO DESIGNER

2021 ◽  
Vol 83 (2) ◽  
pp. 37-45
Author(s):  
Muhammad Zainuddin Arriafdi ◽  
Mohd Helmi Sani ◽  
Wan Azlina Ahmad ◽  
Muhd Nazrul Hisham Zainal Alam
Keyword(s):  
Operating Cost ◽  
Downstream Processing ◽  
Capital Cost ◽  
High Yield ◽  
Separation Processes ◽  
Dead End ◽  
Strain Process ◽  
Filtration Unit ◽  
High Degree ◽  
Process Simulator

The aim of this work is to utilize a process simulator SuperPro Designer v5.5 (Intelligent, NJ, USA) for investigation on the most optimum scenario for the recovery of flexirubin pigment that was produced from a fermentation process using Chryseobacterium artocarpi strain. Process flow sheeting was based on the production of 300 kg per annum of flexirubin. Production phase at 1000 L bioreactor (including steps for the inoculum development) and different scenarios/routes for recovery of flexirubin were considered. SuperPro designer process simulator allowed for the computation of overall operating cost and capital cost under various operating parameters. Results from simulation shows that all proposed downstream processing routes is capable of achieving a high degree of flexirubin recovery yield i.e. at least 94% (or greater).  Operating cost was relatively low as the overall quantity of flexirubin was rather small. Capital cost for equipment purchasing however highly depending on the selection of unit procedures for recovery of flexirubin. Centrifugation unit accelerated the separation processes but it is costly compared to the dead-end filtration unit. The latter was found to be the bottleneck for the optimization step where high yield of flexirubin can be warranted at reduced capital cost by at least 40%.

scholarly journals PREDICTION OF STABILITY OF THE CIRCULATING WATER

2020 ◽  
pp. 61-68
Author(s):  
Olena Pavlivna Galkina
Keyword(s):  
Calcium Ion ◽  
Coke Plant ◽  
Ion Content ◽  
Corrosion Properties ◽  
Circulating Water ◽  
Water Composition ◽  
Coke Plants ◽  
Stability Of Water ◽  
Total Salinity ◽  
Thermal Stability Of

In the work, on the basis of the data of the analysis of theoretical works and the laboratory studies carried out, the prediction of the values of corrosion rates in the circulating systems of coke plants was carried out using the Langelier and Ryznar stability indixes. The laws governing changes in the thermal stability of water as a function of temperature and water quality indicators (pH, alkalinity, total salinity, calcium ion content) have been established. Analysis of the obtained data showed that there is a clear dependence of the scale-corrosion properties of water on temperature and its chemical composition. A stable and effective supplying water composition for the circulating water supply system of the Kharkiv Coke Plant has been established.

Mödling WWTP – treatment efficiency and relationship to receiving water quality

1996 ◽  
Vol 33 (12) ◽  
pp. 47-55 ◽  
Author(s):  
A. Franz ◽  
O. Nowak ◽  
H. Kroiss
Keyword(s):  
Treatment Plant ◽  
Pilot Scale ◽  
Treatment Efficiency ◽  
Limit Values ◽  
Operational Conditions ◽  
Process Comparison ◽  
Receiving River ◽  
Receiving Waters ◽  
Filtration Unit ◽  
High Degree

The relationship between water protection of small receiving waters and the reliability of treatment efficiency is represented by a 100,000 PE plant. On the basis of stringent emission and immission standards a concept for a one-stage activated sludge plant was developed that meets the current demands on removal efficiency and limit values in Austria with a high degree of reliability. Classic saprobiological analysis of the receiving creek showed saprobic class II. The operation of the treatment plant has been tested in a period of more than two years under normal operational conditions. In this period several modes of operation were investigated and the concept has proved to be successful. A comprehensive data base has been worked up for process comparison and design evaluation. Relevant effluent parameters of a filtration unit in pilot scale are also given. Mass balances for a validation of the data and statistical characterisation of treatment efficiency combined with saprobiological characterisation of the receiving river has proved the applicability to similar cases. These investigations may serve as an example of how to relate treatment efficiency to saprobity of small receiving rivers.

Reducing the corrosion losses of metals when using phenolic wastewater in coke-plant cooling systems

2013 ◽  
Vol 56 (8) ◽  
pp. 286-291 ◽  
Author(s):  
S. V. Nesterenko ◽  
V. A. Tkachev ◽  
E. P. Smilka
Keyword(s):  
Coke Plant ◽  
Cooling Systems ◽  
Phenolic Wastewater
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