1. Introduction

What is a biochemical tank? It is a key facility for time-programmed wastewater treatment rather than spatial-programmed treatment. With the shift toward refined management of biological tanks in modern wastewater treatment plants, the demand for monitoring instruments has evolved. A prominent management strategy now involves using online monitors for process control to enhance technical management. This paper briefly explores how to optimize online monitoring of biochemical tanks in wastewater treatment plants.

2. Enhancing Management and Control Capabilities  

First, it is essential to improve management and control capabilities. Prior to this, the content of process management and the available water quality detectors at the current stage must be clarified. Only with a comprehensive understanding of the process and monitoring equipment can a rational monitoring method be selected for process management. For example, phosphorus and nitrogen removal is an economical and nature-aligned process. The conventional A²/O process for phosphorus and nitrogen removal in wastewater treatment plants achieves the removal of different nutrients through functional zones.

3. Understanding Monitoring Instruments for the Biological Stage  

After gaining insight into the biological-stage wastewater treatment process, it is necessary to understand the instruments used in this stage. Monitoring equipment and detection methods vary across different stages and wastewater treatment plants, including techniques such as ultraviolet spectroscopy, fluorescence spectroscopy, and electrolyte-based methods. For users, the focus should not be on mastering these techniques themselves, but on verifying whether the purchased instruments match the target parameters and meet the required detection range.

4. Ensuring Stable and Accurate Data Acquisition  

During operation, water quality detectors require a stable environment to generate highly accurate data. Thus, attention must be paid to instrument installation—devices should be placed in stable locations. Additionally, water quality detection equipment produced by Hangzhou Modi must be installed indoors, with the temperature maintained between 0°C and 40°C, to ensure data accuracy and stability. Beyond environmental factors, water quality itself significantly impacts results; turbid water samples can compromise monitoring accuracy.

5. Key Water Quality Detectors for Biochemical Tanks  

Typical water quality detectors used in biochemical tanks include pH meters, online ammonia nitrogen monitors, and online total phosphorus analyzers. However, instrument selection should be tailored to specific operational conditions.