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What to do when anaerobic tower sludge is running

What to do when anaerobic tower sludge is lost? As we all know, high-efficiency anaerobic reactors are the core of wastewater treatment systems. In actual operation, abnormal situations such as the loss of anaerobic granular sludge often occur. Continuous sludge loss will inevitably lead to a decrease in the amount of sludge in the anaerobic reactor and a reduction in treatment capacity. Reasons for sludge loss: When the anaerobic reactor is operating normally, a small amount of dead metabolic anaerobic sludge will be lost with the water flow. If the loss is significantly greater than the sludge production, it is called "sludge loss", which requires special attention. There are many reasons for sludge loss. Common factors include: sludge voids, poor settling, excessively high upward velocity, biogas pipes...

2020

Common Anaerobic Tower Anomalies and Solutions (Part 2)

Common Anomalies and Solutions for Anaerobic Towers (Part 2) Flocculent sludge or loosely aggregated "flocculent" granular sludge forms and washes away Cause: Due to the action of acid-producing bacteria in the suspended solids in the feed, granular sludge aggregates, and a large number of acid-producing bacteria are produced on the surface of the granules or in a suspended state, forming surface "villi" granules, with a large number of acid-producing bacteria attached to the surface of the granules. Solution: Remove suspended solids from the influent and increase the degree of pre-acidification of the wastewater. Reasons for the breakage and dispersion of granular sludge: Sudden changes in load or influent concentration in the anaerobic tower; a sudden increase in the degree of pre-acidification, resulting in acid-producing bacteria being in a state of starvation; or the presence of toxic substances in the wastewater.

2020

Common Anomalies and Solutions in Anaerobic Towers (Part 1)

Anaerobic towers, with their high processing capacity, are frequently used to treat high-concentration organic wastewater and play a crucial role in the daily operation of wastewater treatment systems. During the operation of anaerobic towers, problems such as slow granular sludge growth, insufficient gas production, and sludge loss often occur. Today, we will discuss the causes and solutions for these abnormal phenomena. Slow granular sludge growth in anaerobic towers. Reasons: Insufficient nutrients and trace elements; Excessive pretreatment acidification; Too low sludge load; Granular sludge being washed away; Solutions: Increase the concentration of nutrients and trace elements in the liquid; Reduce the degree of pretreatment acidification; Increase the reactor load.

2020

Introduction to Anaerobic Tower Operation and Management

When the concentration of treated wastewater is high (CODCr value greater than 5000mg/L), a reflux operation mode must be adopted. The reflux ratio is determined according to the specific situation. Effective reflux can not only reduce the influent concentration, but also increase the influent volume, ensuring uniform water flow distribution in the treatment facility and avoiding short water flow. The temperature of general industrial wastewater is difficult to reach 35℃ and requires heating (especially in winter). Therefore, in order to save energy for heating, on the one hand, attention should be paid to heat preservation (including increasing the reflux flow rate, etc.), and on the other hand, heat loss of the reactor should be prevented as much as possible. The sludge concentration in the reactor must be fully utilized.

2020

What are the prerequisites for the normal operation of an anaerobic tower?

Prerequisites for normal operation of an anaerobic tower: Suitable pH value: For the anaerobic reaction to proceed smoothly, the pH value in the reactor must be between 6.5 and 8.2. Sufficient nutrients: The nitrogen concentration in the reactor must be within the range of 40~70mg/L to meet the needs, while maintaining low concentrations of phosphorus and sulfide. Methanogenic archaea have special requirements for sulfide and phosphorus, and their content in the reactor must be ensured. Sometimes it is necessary to add phosphate fertilizer and sulfate to the influent. Essential trace nutrients: Obligate nutrients that activate methanogenic archaea include iron, cobalt, nickel, zinc, and manganese.

2020

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