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Common problems of sludge treatment- sludge bulking

Source:Jiangsu Envset     Time:23 October 2020

sludge dehydrator

When we use the sludge dehydrator for sludge treatment, we will encounter many problems. How should we deal with these problems? Next, we will introduce you to the solution when the sludge expands.


We can control sludge expansion by adjusting the process operation measures. Adjusting and operating process control measures are very effective for sludge expansion caused by improper process conditions.

Specific Method:
1.Add clay, hydrated lime, raw sludge or digested sludge at the water inlet of the aeration tank to improve the sedimentation and compactness of activated sludge;
2.Keep the wastewater entering the aeration tank in a fresh state, such as taking pre-aeration measures to make the wastewater in an aerobic state;
3.Strengthen the aeration intensity, increase the DO concentration of the mixed solution, and prevent the mixed solution from being hypoxic or anaerobic;
4.Supply nutrients such as nitrogen and phosphorus to maintain the balance of nutrients such as C, N, P in the mixed solution;
5.Increase the sludge return ratio and reduce the residence time of sludge in the secondary settling tank;
6.Perform pre-aeration to remove acid gas or add alkali to adjust the wastewater to increase the pH value of the influent of the aeration tank;
7.Play the role of the adjustment tank to ensure that the sludge load of the aeration tank is relatively stable;
8.Control the inlet water temperature of the aeration tank;
Add a biological selector in front of the aeration tank (permanent measure). The aerobic biological selector is to perform regenerative aeration before the return sludge enters the aeration tank, reduce the content of viscous substances in the return sludge, make the microorganisms enter the endogenous respiration stage, and improve the ability of the bacteria micelles to take up organic matter and Competitiveness with filamentous microorganisms. In order to enhance the effect of the biological selector, a sufficient amount of nutrients such as nitrogen and phosphorus can be added in the aeration process to improve the activity of the sludge.

Jiangsu Envset provides customers with high-quality sludge dewatering machines. We are familiar with common problems encountered when dealing with sludge. If you have any questions about the solution to sludge bulking, please contact us.

Tag: sludge treatment common problems, sludge bulking, sludge expansion