Improving the settling of activated sludge using microorganisms is an effective and sustainable method to enhance the performance of biological wastewater treatment systems. Here are some basic steps and measures you can take:

1. Analyze the causes:

• Examine the microbial system:Identify any imbalances in the microbial community (e.g., lack of aerobic or anaerobic microorganisms).
• Check operating conditions:Ensure conditions such as pH, temperature, dissolved oxygen concentration, and nutrients are suitable for microorganisms.

2. Adjust operating conditions:

• pH adjustment: Maintain pH within the optimal range (typically between 6.5 and 8.5) to maximize microbial activity.
• Temperature control: Ensure temperature is within the appropriate range for microorganisms (usually between 20°C and 35°C).
• Increase oxygen supply: Enhance aeration systems to provide sufficient dissolved oxygen for aerobic microorganisms.

3. Use microbial products:

• Supplement with specialized microorganisms: Use microbial products containing strains that improve settling. These products often include species like Bacillus, Pseudomonas, and other strong organic degraders.
• Combine Aerobic and anaerobic microorganisms:Integrate both types to optimize degradation and settling processes.

4. Control the F/M Ratio (Food to Microorganism Ratio):

• Adjust nutrient levels: Ensure the F/M ratio is appropriate to avoid overloading or nutrient deficiency for microorganisms.

5. Handle sludge:

• Adjust sludge retention time (SRT): Increasing SRT can allow poorly settling microorganisms time to grow and form better-settling sludge.
• Use supporting chemicals: Employ polymers or coagulants if needed to assist the settling process..

6. Monitor and manage the system:

• Regular monitoring: Frequently check parameters such as sludge concentration, Sludge Volume Index (SVI), and microbial health to detect and address issues promptly.
• System maintenance: Ensure that wastewater treatment equipment is well-maintained and operating effectively.

By combining these measures, you can improve the settling of activated sludge and enhance the efficiency of your wastewater treatment system.

Tip: How to Improve Difficult Settling of Activated Sludge Using BIOCLEAN Microorganisms Imported from the USA by BIOTECH VIETNAM

Add appropriate microbial strains

For cases where microorganisms lack food, increase the food supply by either increasing the volume of wastewater treated or supplementing with additional nutrients to promote microbial growth and development. When inoculating new microorganisms, ensure a favorable environment:

• pH maintained between 6 – 7.
• DO > 2mg/L.
• C:N:P ratio - 100:5:1.

Achieving these environmental factors can reduce difficult settling sludge within 2-3 weeks.

Bioclean ACF 32 liquid microbial supplement  used for multi-industry wastewater and industrial wastewater

• Helps reduce BOD, COD, and TSS at the inlet.
• Reduces the COD and BOD oxygen demand and suspended solids.
• Decreases sludge volume and difficult-to-degrade compounds.
• Balances the effective bacterial community in activated sludge.
• Reduces and controls the odor of the entire system.
• Assists in the oxidation of nitrogen-containing compounds (nitrification process).
• Maintains the treatment efficiency of the wastewater system.

Add Bioclean ACF SA microorganisms

Function:

+ Supports the settling process and degradation of difficult-to-degrade organic matter.

+ Promotes large sludge flocs and easy settling of sludge.

+ Reduces and controls odors from decomposing sludge.

+  Increases biological Sludge Retention Time (SRT) and minimizes sludge waste.

- Packaging: 1 bottle = 3.785 liters

• Dosage calculation table

BIOCLEAN ACF 32

+ Dosage: 70 - 150 ppm/week

BIOCLEAN ACF SA

+ Dosage: 70 - 100 ppm/week

*1ppm = 1ml/1m³ of tank = 1g/1m³ of tank

*Notes:

- The dosage mentioned may vary depending on the level of pollution in the system. (Contact technical để được tư vấn phương án cụ thể: 0914.811.441)

- It is recommended to divide the weekly dosage into 2-3 applications to optimize microbial activity in the system.

- Maintain the system for the following weeks to ensure optimal performance.

Ensure adequate nutrient supply: 

To avoid difficult settling sludge, maintain minimum concentrations of ammonia and phosphate at 1.5 mg/L and 0.5 mg/L, respectively.

Ensure proper aeration

Maintain DO levels between 2-3.5 mg/L. However, avoid excessive oxygen levels as continuous agitation can prevent proper sludge settling.