Process control of solid particles in circulating water (IV) Regulating TTS by circulating volume!

Controlling TSS concentration by adjusting the circulation volume

 In a recirculating aquaculture system, adjusting the circulation volume is one of the effective ways to control the concentration of suspended solid matter (TSS) in the water. By properly adjusting the circulation volume, the removal efficiency of suspended particles can be optimized and the water quality can be maintained stable. By using the circulating water circulation volume to control the TSS concentration, the circulating water volume and solid particle removal effect can be calculated based on the mass balance model.

TSSin

     Among them:

TSSin: Influent TSS concentration (mg/L).

TSSout: Outlet TSS concentration (mg/L).

Q: Circulating water volume (m³/h).

RTSS: Retention of solid particles (g/h).

The following are specific methods and strategies:

(1). Effect of circulation volume on TSS concentration

   The circulation volume refers to the volume of water passing through the filter equipment per unit time. The adjustment of the circulation volume will directly affect:

The removal efficiency of suspended particles: As the circulation volume increases, the treatment capacity of the filter equipment increases and the TSS concentration decreases.

Water residence time: As the circulation volume increases, the residence time of the water in the filter equipment decreases, which may reduce the removal efficiency.

Energy consumption: As the circulation volume increases, the energy consumption of the water pump and the filter equipment increases.

(2). Specific measures to adjust the circulation volume
1. Dynamic adjustment according to TSS concentration

     When TSS concentration is high: increase circulation volume, improve the processing capacity of the filtration equipment, and quickly reduce TSS concentration.

When TSS concentration is low: reduce circulation volume, reduce energy consumption, and maintain TSS concentration within the target range.

2. Combined with the performance of filtration equipment

     Filtration equipment capacity: According to the processing capacity of the filtration equipment, the circulation volume should be reasonably set to avoid overload operation.

Filtration efficiency: Optimize the circulation volume to ensure that the water has enough residence time in the filtration equipment to improve the removal efficiency.

3. Use variable frequency water pump

     Frequency conversion control: Dynamically adjust the circulation volume through the frequency conversion water pump, and automatically adjust the water pump operation frequency according to the TSS concentration and water quality requirements.

Energy saving and consumption reduction: When the TSS concentration is low, reduce the water pump operation frequency and reduce energy consumption.

Circulating water solid particle intelligent process control system     

From the above analysis, it can be seen that the process control of circulating water solid particles is very complicated. If there is no advanced intelligent control system, it is very difficult to rely solely on manual operation. The circulating water solid particle intelligent process control system is an intelligent management system based on the Internet of Things (IoT), big data analysis and artificial intelligence (AI) technology. It is designed to monitor, analyze and control the concentration of suspended solid particles (TSS) in the circulating water aquaculture system in real time to ensure stable water quality and healthy aquaculture organisms.

     The figure below is the operating interface of the solid particle intelligent control process system developed by WOLIZE.

The system has the following functions:

• Real-time monitoring

TSS concentration monitoring: real-time monitoring of the concentration of suspended solid particles in water.

Water quality monitoring: monitoring key water quality parameters such as dissolved oxygen, pH value, and temperature.     

2. Intelligent control

Circulation volume control: dynamically adjust the circulation volume according to the TSS concentration to optimize the filtration efficiency.

Automatic sewage discharge: automatically discharge sewage according to the amount of sludge in the sedimentation tank to reduce the accumulation of suspended particles.

Feeding management: optimize the feeding amount and frequency according to the TSS concentration and the needs of the aquaculture organisms.     

3. Data analysis and prediction

Data visualization: Display TSS concentration and water quality change trends through charts and reports.

AI-assisted decision-making: The system provides decision-making suggestions for adjusting circulation volume, sewage discharge frequency and feeding amount to optimize water quality management based on the algorithm

Alarm system: Automatically send alarm information when TSS concentration or water quality parameters are abnormal.

4. Remote management

Mobile application: Remotely monitor and manage the system through mobile phones or tablets.

Cloud platform management: View data, adjust parameters and generate reports through the Web platform.