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Henan Suijing Environmental Protection Technology Co., Ltd
Date: 2025-12-24Read: 1
Training case of GNST-900S multi parameter water quality detector in Anhui Hefei Automotive Parts Enterprise Sewage Testing Laboratory
1、 Training background and objectives
（1） Background Overview
A certain automobile parts manufacturing enterprise in Hefei, Anhui Province (mainly engaged in the production of engine parts and automotive exterior parts) generates industrial wastewater containing pollutants such as COD, ammonia nitrogen, total phosphorus, and total nickel during surface treatment and coating processes of parts. In order to strictly comply with the Comprehensive Wastewater Discharge Standard (GB 8978-1996) and the relevant requirements for clean production in the automotive parts manufacturing industry, and ensure that wastewater is discharged in compliance with standards, the enterprise has built a new wastewater testing laboratory and introduced the GNST-900S multi parameter water quality tester. This instrument is designed based on IoT intelligence and is equipped with Genesite intelligent detection system and ST32 ARM processor. It can accurately detect more than 40 water quality indicators, especially suitable for detecting characteristic pollutants such as COD, ammonia nitrogen, total phosphorus, and total nickel in industrial wastewater. It has the advantages of fast detection speed, strong data stability, and convenient operation. In order to ensure that laboratory testing personnel fully master the correct operation, precise calibration, data interpretation, and daily maintenance skills of instruments, and fully play the core role of equipment in sewage standard discharge control, the enterprise has partnered with instrument supplier Henan Suijing Environmental Protection Technology Co., Ltd. to carry out targeted special training.
（2） Core objective
Theoretical level: Enable trainees to understand the detection principle, core technical indicators, and national standard basis of GNST-900S instrument, and clarify the applicable scenarios for different water quality indicators testing.
Practical level: Ensure that trainees are proficient in the entire process of instrument startup self check, parameter calibration, sample preparation and testing, data storage and export, and can independently complete the testing of typical water quality indicators.
Guarantee level: Master the common troubleshooting methods and daily maintenance points of instruments, extend the service life of instruments, and ensure the long-term stability and reliability of detection data.
Application level: To achieve deep integration of theory and scientific research practice, enhance the ability of trainees to use instruments to solve practical scientific research problems, and lay the foundation for the smooth progress of related environmental monitoring scientific research projects.
Application level: To achieve deep integration of theory and practical operation of enterprise sewage detection, enhance the ability of trainees to quickly and accurately complete the detection of characteristic indicators of production wastewater using instruments, provide reliable data support for optimizing enterprise sewage treatment processes and meeting emission standards, and avoid environmental compliance risks.
2、 Training preparation
（1） Organizational Structure
1. Host: Environmental Science Research Center, Yangtze River Delta Research Institute, University of Electronic Science and Technology of China (Huzhou)
2. Supporting unit: Henan Suijing Environmental Protection Technology Co., Ltd
3. Training instructor: Senior technical engineer from the supplier (with rich experience in GNST-900S instrument debugging and training)
4. Trainees: 22 members of the research team related to environmental monitoring and experimental technicians from the research institute
（2） Preliminary preparation
Site and equipment preparation: The standardization laboratory of the research institute is selected as the training site, and the operation table is organized in advance to ensure good ventilation and that the temperature and humidity meet the requirements for instrument operation (temperature 5-40 ℃, relative humidity ≤ 85% RH). Place the GNST-900S host, multifunctional intelligent digestion instrument, supporting testing tubes, prefabricated reagents and other equipment and materials in place according to the operating line, complete the power connection and power on self-test, and ensure that all equipment is in normal working condition; Prepare calibration solution, simulated water sample, deionized water, lens cleaning paper and other practical consumables at the same time.
Preparation of materials and tools: Each participant shall be equipped with one set of "GNST-900S Multi parameter Water Quality Tester Manual", training materials (including theoretical knowledge points, operation process diagrams, and common problem manuals), and electrical insulation tools, equipment debugging tools, and materials such as "Training Sign in Form" and "Practical Assessment Scoring Form".
Customized plan: The instructor communicates in advance with the environmental protection manager and laboratory director of the enterprise, and adjusts the training content accordingly based on the characteristics of the enterprise's production wastewater (complex composition, large water quality fluctuations) and core testing needs. The focus is on strengthening the operation training of industrial wastewater characteristic indicators such as COD, ammonia nitrogen, total phosphorus, and total nickel, and adding content related to the pretreatment of complex industrial wastewater samples to ensure that the training content is in line with the actual environmental control of the enterprise.
3、 Training Implementation Process
This training adopts a diversified mode of "theoretical explanation+practical demonstration+group practice+assessment summary", lasting for 1 day. The specific process is as follows:
（1） Theoretical explanation session (9:00-10:30)
The lecturer conducts systematic theoretical lectures through PPT combined with physical presentations
Core principle of the instrument: Detailed explanation of the LED cold light source optical structure, data homogenization calculation algorithm and other core technologies of GNST-900S instrument, elaborating on the principles of different detection items, such as COD potassium dichromate method, ammonia nitrogen Nessler's reagent method, total nickel dimethylglyoxime spectrophotometric method, etc., and comparing the technical requirements and qualified limits of each characteristic index detection with national standards such as "Comprehensive Wastewater Discharge Standard".
Technical specifications and functions: Introduce key technical parameters such as the detection range, detection limit, relative error, and repeatability of the instrument, demonstrate the operation logic of the 8-inch IPS high-definition color touch screen, and explain the application scenarios of core functions such as data storage (supporting 100000 data storage), automatic printing, and batch testing.
Safety and Standards: Emphasize special safety precautions for industrial wastewater testing, including protective treatment of heavy metal containing wastewater samples, standardized use of chemical reagents (such as strong oxidants and color developing agents), and key protection points for high-temperature digestion processes; Clarify the sampling standards, sample preservation, and pretreatment processes (such as coagulation and sedimentation, demulsification and oil removal, etc.) for different discharge outlets (pre treated and post treated discharge outlets) of enterprise production wastewater, and explain the impact of sampling time and frequency on detection results.
Maintenance and troubleshooting basics: Briefly explain the core points of daily instrument maintenance, such as probe cleaning, reagent storage, battery maintenance, etc; Briefly introduce the preliminary judgment methods for common faults such as unresponsive startup and data drift.
（2） Practical demonstration session (10:40-11:40)
The lecturer conducted a full process practical demonstration based on the core detection indicators of enterprise sewage, focusing on the key operating steps and exclusive precautions for industrial sewage detection:
Instrument initialization: Demonstrate the power on self-test process and explain how to determine the operating status of the instrument hardware (display screen, buttons, light source) and software system; Introduce the parameter adjustment methods for the system settings interface, such as date and time settings, measurement unit switching, etc.
Calibration operation: Taking COD (high range, suitable for detecting high concentration pollutants in industrial wastewater) and total nickel detection as examples, demonstrate the two-point calibration process - after cleaning the detection channel with deionized water, add blank solution and standard calibration solution in sequence, wait for the reading to stabilize, complete the calibration and save the parameters. Emphasize the shaking of the calibration solution before use, the adjustment points of the calibration cycle in industrial wastewater detection, and the operating norms to avoid cross contamination.
Sample testing: Demonstrate the pretreatment process of industrial wastewater samples (coagulation, settling, filtration), explain the standard addition of prefabricated reagents, the precise suction and digestion steps of water samples, and explain the key parameter settings of the multifunctional intelligent digestion instrument for different indicators; Put the processed sample into the instrument for testing, demonstrate the methods of data stability judgment and abnormal data review.
Data export: Demonstrate the operation steps of exporting detection data to a computer through a USB interface, and explain the interpretation method and archiving requirements of data files.
Closing operation: Explain the cleaning process of the instrument after the detection is completed (rinse the probe and detection channel with deionized water), the correct storage method of the probe, and the key points of equipment organization.
（3） Group practice session (13:30-16:00)
The trainees are divided into three groups, each equipped with one set of GNST-900S instrument and complete consumables. Under the one-on-one guidance of the instructor and teaching assistant, practical exercises are carried out:
Basic operation exercise: Each group completes the instrument power on self-test, system parameter setting, and calibration of core indicators (COD, total nickel) in sequence. The instructor provides tour guidance to correct any non-standard operations, such as improper cleaning of the detection channel, errors in calibration solution preparation, and missing preprocessing steps.
Sample testing exercise: Using actual production wastewater samples from the enterprise (including comparison samples before and after pretreatment), complete the entire process from sample pretreatment, reagent addition, digestion to testing, record testing data, compare testing results between different groups, analyze the reasons for differences, and verify the correlation between testing data and the operation status of the enterprise's wastewater treatment system.
Fault simulation and troubleshooting: The instructor sets common fault scenarios, such as "instrument unresponsive", "large data fluctuations", "data export failure", etc., and divides the trainees into groups to troubleshoot and solve them, strengthening their grasp of fault handling methods.
Q&A: Participants may ask the instructor questions based on the actual problems encountered in the enterprise's sewage testing work, such as "pretreatment methods for high concentration oily wastewater", "calibration frequency adjustment when water quality fluctuates greatly", "emergency response procedures for exceeding detection data", etc. The instructor will answer them one by one and provide extended explanations based on industrial sewage testing cases.
（4） Assessment and Summary Session (16:10-17:00)
Practical assessment: Randomly select one industrial wastewater characteristic detection index (COD/ammonia nitrogen/total phosphorus/total nickel) in groups, and use actual wastewater samples from the enterprise to complete the entire process of pretreatment, calibration, detection, and data export. The instructor will score based on operational norms, data accuracy, and ability to handle abnormal situations, with a pass rate of 100%.
Training Summary: The instructor reviewed the core knowledge points and operational essentials of this training, sorted out the common problems that the trainees encountered in practical operation, and provided improvement suggestions; The environmental protection manager of the enterprise summarized the training results, emphasized the importance of standardized use of instruments for environmental compliance of the enterprise, clarified the reporting process and archiving requirements for testing data, and established a rapid feedback and technical support mechanism for equipment usage issues.
Feedback collection: Distribute training feedback questionnaires to collect opinions and suggestions from trainees on training content, lecturer level, practical arrangements, and other aspects, providing reference for optimizing training work in the future.
4、 Training effectiveness
Skill Enhancement: All participants have proficiently mastered the theoretical knowledge of GNST-900S instrument and practical skills in industrial wastewater detection. They are able to independently complete the full process detection of characteristic indicators of enterprise production wastewater. The operational standardization and data accuracy meet the expected requirements, solving the problems of "non-standard sample pretreatment" and "large deviation of high concentration wastewater detection data" previously.
Compliance guarantee: After the training, the instrument was quickly put into the daily detection work of enterprise sewage, realizing the daily mandatory inspection of production wastewater discharge indicators and real-time sampling of key process wastewater. The detection efficiency has increased by more than 60% compared to previous third-party testing, and the data stability has been significantly enhanced. It provides accurate and reliable data support for optimizing enterprise sewage treatment processes and achieving standard discharge control, effectively reducing environmental compliance risks.
Management standards: Established a registration system for instrument use, regular calibration and maintenance system, and clarified equipment management responsibilities for trainees, effectively reducing instrument failure rates and extending equipment service life.
Mechanism establishment: Through this training, the technical cooperation between the research institute and instrument suppliers has been deepened, and a long-term technical exchange channel has been established, laying a good foundation for solving complex detection problems and upgrading detection technology in the future.
5、 Experience Summary and Prospect
（1） Experience summary
Precise customization is key: This training closely combines the pollution characteristics of industrial wastewater in automotive parts enterprises with environmental compliance needs, focuses on core characteristic indicator testing, and adds targeted content such as sample pretreatment, avoiding the "general but not precise" nature of generic training and improving the effectiveness of training.
Practical orientation is the core: adopting a practical teaching mode of "demonstration+practice+fault simulation", participants can master skills in practice, and correct erroneous operations in a timely manner through one-on-one guidance, effectively improving learning efficiency.
Multi party collaboration is a guarantee: the efficient collaboration between the research institute and suppliers ensures sufficient preparation of training venues, equipment, consumables, and other resources. The professional lectures and subsequent technical support of the instructors provide strong guarantees for the consolidation of training effectiveness.
（2） Future prospects
Subsequent enterprises will further carry out specialized skill enhancement activities based on the results of this training. Firstly, advanced specialized training will be conducted on difficult issues such as high concentration and complex component production wastewater detection and emergency monitoring; Secondly, establish an internal technical exchange platform to encourage trainees to share practical experience and typical testing cases, and achieve skill sharing; Thirdly, we will continue to deepen cooperation with suppliers, timely follow up on instrument technology upgrades, optimize testing plans based on the needs of enterprise production process upgrades, and provide stronger environmental testing support for the green and low-carbon development and sustainable compliant operation of enterprises.
