1. The document discusses three external water softening processes: lime-soda process, zeolite process, and ion exchange process.
2. The lime-soda process uses lime and soda ash to precipitate calcium and magnesium ions from water. The zeolite process uses naturally occurring minerals to exchange sodium ions for calcium and magnesium ions. The ion exchange process uses cation and anion exchange resins to remove ions from water.
3. Each process has advantages like reducing hardness and corrosion but also limitations such as producing waste sludge or requiring pre-treatment of the raw water.
Treatment of water for domestic use,Screening,Sedimentation,Co-agulation,Filtration,Disinfection of water,Water softening
Permutit Process,Ion exchange method,Mixed bed Dimneralisation process, Lime- Soda process ,Desalination
RO Method, Electrodialysis
Treatment of water for domestic use,Screening,Sedimentation,Co-agulation,Filtration,Disinfection of water,Water softening
Permutit Process,Ion exchange method,Mixed bed Dimneralisation process, Lime- Soda process ,Desalination
RO Method, Electrodialysis
Soft, hard and heavy water, by Saliha Rais, for grade 9.Saliha Rais
The slide show includes the following topics:
1. hard water
2. soft water
3. causes of hardness of water
4. types of hardness (temporary and permanent)
5. methods to remove temporary hardness (heating and clarks method)
6. methods to remove permanent hardness (with washing soda, caustic soda and zeolite)
7. Heavy water
8. hygroscopic and deliquescent substances
I have made this presentation for grade 9 students.
Soft, hard and heavy water, by Saliha Rais, for grade 9.Saliha Rais
The slide show includes the following topics:
1. hard water
2. soft water
3. causes of hardness of water
4. types of hardness (temporary and permanent)
5. methods to remove temporary hardness (heating and clarks method)
6. methods to remove permanent hardness (with washing soda, caustic soda and zeolite)
7. Heavy water
8. hygroscopic and deliquescent substances
I have made this presentation for grade 9 students.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
4. EXTERNAL TREATMENT:-
• the treatment given to water for the removal of hardness causing
salts before it is taken into the boiler is called external treatment.
6. LIME-STONE PROCESS:-
In this process, Calcium and Magnesium ions are precipitated by the addition of lime
(Ca(0H)2) and (Na2CO3).
standard water-softening process.
Carried out either hot or cold.
Use lime (Ca(OH)2) and soda ash (Na2CO3) to reduce the hardness of the treated water by
precipitating the dissolved calcium and magnesium salts as insoluble calcium carbonate and
magnesium hydroxide respectively.
Also used in the preparation of caustic soda (NaOH),by mixing slaked lime (Ca(OH)2)with
soda and filtering off the precipitated calcium carbonate (CaCO3).
7. As slacked lime is added to a water, it will react with any carbon dioxide present as follows:
Ca(OH)2 + CO2 CaCO3 + H2O(Eq.1)
The lime will react with carbonate hardness as follows:
Ca(OH)2 + Ca(HCO3)2 2CaCO3 + 2H2O(Eq.2)
Ca(OH)2 + Mg(HCO3)2 MgCO3 + CaCO3 + 2H2O(Eq.3)
The product magnesium carbonate is soluble. To remove it, more lime is added:
Ca(OH)2 + MgCO3 CaCO3 + Mg(OH)2 (Eq.4)
8. Also, magnesium non-carbonate hardness, such as magnesium sulphate, is removed:
Ca(OH)2 + MgSO4 CaSO4 + Mg(OH)2 (Eq.5)
Lime addition removes only magnesium hardness and calcium carbonate hardness. In equation 5
magnesium is precipitated, however , an equivalent amount of calcium is added . The water now contain the
original calcium non-carbonate hardness produced in equation 5. soda ash is added to remove
calcium non-carbonate hardness:
Na2CO3 + CaSO4 Na2SO4 + CaCO3 (Eq.6)
To precipitate CaCO3 requires a pH of about 9.5; and to precipitate Mg(OH)2 requires a pH of about 10.8,
therefore, an excess lime of about 1.25m eq/L is required to raise the pH.
9.
10. LIMITATIONS:-
1. Lime soda softening cannot produce a water at completely free of hardness because of minute solubility of CaCO3
and Mg(OH)2.
2. Thus the minimum calcium hardness can be achieved is about 30 mg/L as CaCO3, and the magnesium hardness
is about 10 mg/L as CaCO3.
ADVANTAGES:-
1. It increase pH value , there by corrosion is reduced.
2. Due to alkaline nature of water the pathogenic bacteria in water is reduced.
DISADVANTAGES:-
1. Disposal of large amounts of sludge is a problem.
2. The hardness is 50-60 ppm by cold process & about 15-30 ppm by hot process.
11. ZEOLITES PROCESS:-
Naturally occurring hydrated , microporous ,sodium aluminosilicate minerals.
General formula Na2O. AI2O3.xSiO2.YH2O
Zeolites are Capable of exchanging their Na+ ions with hardness producing ions like
Ca2+,Mg2+ present in water.
Natural zeolites are non-porous, e.g. Natrolite, Na2O.AI2O3.3SiO2.2H2O
Synthetic zeolites are porous and have a gel structure.
Can be prepared by heating together sodium Carbonate (Na2CO3),alumina(Al2O3) and
silica(SiO2).
12. Zeolite crystal consists of SiO4 tetrahedra joined to each other and each Oxygen is being
shared with an adjacent one.
As hard water percolates through zeolites, the hardness producing ions i.e. Ca2+,Mg2+ are
exchanged ions of zeolite.
13. Removal of Ca2+,Mg2+ ions from hard water
Na2Z + Ca(HCO3)2 CaZ + 2NaHCO3
(Zeolite) (Hard water)
Na2Z + MgSO4 MgZ + Na2SO4
Na2Z + CaCl2 CaZ + 2NaCl
Regeneration of Exhausted Zeolite
CaZ + 2NaCl Na2Z + CaCl2
(Exhausted Zeolite) (Regenerated Zeolite)
MgZ + 2NaCl Na2Z + MgCl2
14.
15. LIMITATIONS:-
1. Raw water must not contain any coloured ions like Mn2+ and Fe2+,because they form manganese zeolite and
ferrous zeolite which cannot be regenerated.
2. Minerals acids if present in water will destroy the zeolite bed permanently. Water must be neutralized with soda
before it is fed into the zeolite bed.
ADVANTAGES:-
1. The removes hardness almost completely and the treated water contains hardness upto in 10ppm.
2. The process adjust itself for variation of hardness of incoming water.
DISADVANTAGES:-
1. The treated water contains more sodium salts than in lime- soda process.
2. These NaHCO3 salts decompose and liberate CO2 which causes corrosion.
16. ION EXCHANGE PROCESS:-
This process also known as Demineralization or Deionization process.
The process by which a mixture of similar charged ions can be separated by using an ion
exchange resin.
Mostly similar charged ions like cations or anions can be separated by this technique.
An Ion-exchange resin is a cross linked organic polymer network having some ionisable group.
It may be two types depending upon the nature of the ionisable group.
1. Cation exchange resin
2. Anion exchange resin
17. 1. CATION EXCHANGE RESIN:-
These resins exchange the cationic portion of minerals by their hydrogen
atom,they are known as cation exchangers.
2. ANION EXCHANGE RESIN:-
These resins exchange the anionic portion of the minerals and they are known as
anion exchanger.
18.
19. PROCESS:-
In this process first we passed hard water through cation exchange column,which removes all the cations(like ca+2,mg+2
etc.) From it and equivalent amount of H+ ions are released from this column to water.
Thus,
2RH+ + CA+2 R2CA+2 + 2H+
2RH+ + MG+2 R2MG+2 +2H+
After this process,hard water is passed through anion exchange column,which removes all the anions (like SO4
-2,Cl- etc.)
from it, and equivalent amount of OH- ions are released from this column to water.
R`OH-2 + Cl-2 R`Cl- + OH-
2R`OH- + SO2- R`2 SO2-
4 + 2OH-
2R`OH- +CO2-
3 R`2CO2-
3 + 2OH-
H+ and OH- ions get combined to produce water molecule H+ + OH- + H2O
20. LIMITATIONS:-
1. Long-term costs are high when it comes to operating ion exchange equipment.
2. Waste is highly concentrated and requires careful disposal.
ADVANTAGES:-
1. Highly acidic or alkaline water samples can be purified by this process.
2. The hardness possessed by the deionised water is 2 ppm.
DISADVANTAGES:-
1. The ion exchanging resin are expensive,hence the cost of purification is high.
2. Raw water should contain turbidity below 10ppm.