Calcium Hydroxide for Water Treatment – Uses, Benefits & Applications

Calcium Hydroxide, commonly known as Hydrated Lime or Slaked Lime, is an important chemical widely used in water and wastewater treatment processes. Its chemical formula is Ca(OH)₂, and it is produced when calcium oxide (quicklime) reacts with water in a process called slaking.

Calcium hydroxide appears as a fine white free-flowing powder and has strong alkaline properties. Because of its high pH value, it is widely used to neutralize acidic water, remove impurities, and improve overall water quality.

Due to its effectiveness and low cost, calcium hydroxide is widely used in municipal water treatment plants, industrial wastewater treatment systems, and environmental treatment processes.

Calcium Hydroxide (Food Grade)

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What is Calcium Hydroxide?

Calcium hydroxide is an inorganic alkaline compound that plays a major role in many purification and chemical treatment processes.

Chemical Information

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Product Specifications

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Why Calcium Hydroxide is Used in Water Treatment

Calcium hydroxide is widely used in water treatment because it can raise pH levels and remove harmful contaminants.

Key Benefits

✔ Neutralizes acidic water
✔ Removes heavy metals and impurities
✔ Improves water clarity
✔ Helps in sludge stabilization
✔ Cost-effective water treatment chemical

Because of these advantages, calcium hydroxide is an essential chemical used in water purification systems around the world.

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Major Applications in Water Treatment

1. Drinking Water Treatment

Calcium hydroxide helps adjust the pH level of drinking water, making it safe for consumption.

2. Wastewater Treatment

It is widely used to neutralize industrial wastewater and sewage treatment plants.

3. Heavy Metal Removal

Hydrated lime helps remove heavy metals such as:

• Lead

• Copper

• Zinc

• Nickel

from wastewater.

4. Sludge Stabilization

Calcium hydroxide helps reduce harmful microorganisms and stabilize sludge produced during wastewater treatment.

5. Industrial Water Purification

Industries use hydrated lime to treat water before discharge or reuse.

Hydrated Lime in Construction

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Industrial Applications of Calcium Hydroxide

Apart from water treatment, calcium hydroxide is also widely used in many industries.

Industrial Uses

• Asphalt manufacturing

• Metallurgy

• Construction materials

• Iron and steel production

• Ore concentration

Environmental Uses

• Effluent treatment

• Flue gas treatment

• Hazardous waste treatment

• Bio-solid treatment

Chemical Uses

• Production of citrates and nitrates

• Silicates and acetates manufacturing

• Plastic stabilizers

• Paints and lubricants

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Packaging & Storage

Packaging Options

• 40 kg bags

• HDPE bags

• Industrial packaging options

Storage Conditions

• Store in a dry, ventilated area

• Protect from moisture

• Keep bags tightly sealed

Proper storage helps maintain product quality and shelf life.

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Key Features of Calcium Hydroxide for Water Treatment

• Fine free-flowing powder

• Strong alkaline properties

• Effective impurity removal

• Cost-efficient treatment chemical

• Suitable for industrial and municipal water treatment

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Frequently Asked Questions (FAQs)

What is calcium hydroxide used for in water treatment?

It is used to neutralize acidic water, remove impurities, and improve water quality.

Is hydrated lime the same as calcium hydroxide?

Yes, hydrated lime and slaked lime are different names for calcium hydroxide (Ca(OH)₂).

Why is calcium hydroxide effective for wastewater treatment?

Because of its strong alkalinity, it can neutralize acids and precipitate heavy metals.

What industries use calcium hydroxide for water treatment?

Industries such as municipal water plants, chemical factories, mining operations, and manufacturing industries use calcium hydroxide.