Fluorescent Pink Wastewater Decolorization with 08A Decoloring Agent and Anionic PAM
Test Conclusion
In this laboratory jar test, a fluorescent pink wastewater sample was treated through a three-step process using 08A Decoloring Agent, pH adjustment, and anionic polyacrylamide (PAM).
The treatment sequence was:
08A Decoloring Agent → pH Adjustment to 7–8 → Anionic PAM
After treatment, the strong fluorescent pink color was visibly reduced and flocs formed in the wastewater, helping separate color-bearing contaminants from the water phase.
The test illustrates how a combined decolorization and flocculation process can be evaluated for highly colored industrial wastewater.
Important: The dosage used in this test was selected for this specific wastewater sample. Actual operating dosage should always be confirmed through jar testing.
Wastewater Characteristics
The untreated wastewater showed a very bright fluorescent pink appearance, indicating a high concentration of colored dissolved or suspended substances.
Wastewater with this type of strong color may be generated in industries involving:
- dyes and pigments,
- textile processing,
- printing,
- fluorescent chemicals,
- specialty chemicals,
- coatings,
- inks,
- and other color-intensive manufacturing processes.
Strong fluorescent color can be difficult to remove through simple sedimentation or conventional biological treatment alone, especially when the color-causing substances remain dissolved in water.
Laboratory Treatment Process
1
Step 1: Add 3000 ppm 08A Decoloring Agent
The first treatment step was the addition of 3000 ppm 08A Decoloring Agent.
The chemical was mixed thoroughly with the wastewater to allow interaction with the color-causing substances.
The purpose of this step was to destabilize and remove part of the colored contaminants from the wastewater.
2
Step 2: Adjust pH to 7–8
After adding the decoloring agent, alkali was introduced to adjust the wastewater to approximately pH 7–8.
Maintaining an appropriate pH can improve the subsequent flocculation process and create more suitable conditions for PAM performance.
3
Step 3: Add Anionic PAM
Anionic polyacrylamide was then added to promote flocculation.
The PAM helped small destabilized particles and color-containing matter aggregate into larger flocs.
These larger flocs are easier to separate through sedimentation or other solid-liquid separation processes.
Laboratory sequence: 08A Decoloring Agent addition, pH adjustment to 7–8, and anionic PAM flocculation.
Treatment Result
During the test, visible flocs formed after PAM addition and the fluorescent pink color was significantly reduced compared with the untreated sample.
This laboratory result indicates that the combination of:
decolorization + pH control + flocculation
can be a practical treatment route for evaluating certain strongly colored industrial wastewater streams.
However, wastewater composition can vary considerably between factories, production lines, and even different production batches.
For this reason, Bluwat recommends performing laboratory jar tests before determining the final chemical combination and operating dosage.
Why Use a Combined Treatment Process?
Strongly colored industrial wastewater may contain both dissolved color molecules and suspended contaminants.
A single chemical may not always provide sufficient removal.
A combined process can perform different functions:
08A Decoloring AgentHelps destabilize and remove color-causing substances.
pH AdjustmentCreates more suitable chemical conditions for downstream flocculation.
Anionic PAMPromotes the formation of larger, stronger flocs for easier separation.
This staged approach can make the treatment process more controllable.
Jar Testing Before Full-Scale Treatment
Before applying chemicals in a wastewater treatment plant, several parameters should be evaluated:
- wastewater pH,
- color intensity,
- suspended solids,
- chemical composition,
- decoloring agent dosage,
- PAM type,
- PAM dosage,
- mixing conditions,
- floc settling performance,
- and final effluent quality.
Jar testing allows treatment parameters to be optimized with a small wastewater sample before full-scale application.
Bluwat Wastewater Treatment Support
Bluwat Chemicals supplies chemicals for industrial wastewater treatment, including:
- Water Decoloring Agents
- Polyacrylamide
- PolyDADMAC
- Polyamine
- PAC
- and other coagulation and flocculation products
We can also support customers with sample evaluation and laboratory jar-test recommendations based on actual wastewater conditions.
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