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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 Ji'an Paper Industry Production Enterprise Laboratory, Jiangxi Province
1、 Training background and objectives
（1） Background Overview
A paper production enterprise in Ji'an, Jiangxi Province (mainly engaged in the production of cultural paper and packaging paper, covering the entire process of pulp and paper making) generates a large amount of industrial wastewater during the production process. The black water discharged from the pulp making process contains high concentrations of fibers, inorganic salts, and pigments, the wastewater from the bleaching process contains acidic and alkaline substances, and the white water from the paper making process contains pollutants such as fibers and fillers. The characteristic pollutants mainly include COD and BOD? Suspended solids (SS), total phosphorus, etc. In order to strictly comply with the "Discharge Standards for Water Pollutants in the Paper Industry" (GB 3544-2001) and the relevant requirements for clean production in the paper industry, and ensure that wastewater is discharged in compliance with standards, the enterprise has upgraded and renovated its sewage 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. Its wide range COD detection function (0-20000mg/L) is particularly suitable for detecting high concentration wastewater in papermaking. It has the advantages of fast detection speed, strong data stability, and easy operation, which can meet the multi link wastewater monitoring needs of papermaking enterprises. 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 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 wastewater in various stages of papermaking 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.
Site and equipment preparation: Select the upgraded standardized sewage testing laboratory of the enterprise as the training site, organize the operation table in advance, ensure good ventilation and temperature and humidity meet the requirements of 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; At the same time, prepare calibration solutions, actual paper wastewater samples from the enterprise (black water, white water, treated wastewater), deionized water, filter membranes, and other practical consumables.
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 responsible person and laboratory director of the enterprise, and combines the characteristics of the enterprise's papermaking wastewater (high concentration and complex composition of pulp black water, high suspended solids content in papermaking white water, and large water quality fluctuations) and core testing needs to adjust the training content accordingly, with a focus on strengthening COD and BOD? Training on the operation of characteristic indicators in the papermaking industry, such as suspended solids and total phosphorus, will be provided. Exclusive content such as high concentration black water dilution pretreatment and white water suspended solids filtration pretreatment will be added 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 the GNST-900S instrument. Explain the principles of different detection items, such as the potassium dichromate method for COD BOD? Dilute and inoculate methods, suspended solids weight method, etc., and compare the technical requirements and qualified limits for the detection of various characteristic indicators with the "Discharge Standards for Water Pollutants in the Paper Industry" (GB 3544-2001), clarifying the detection focus of wastewater in different production processes.
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 regulations: Emphasize special safety precautions for papermaking wastewater detection, including protective treatment of high concentration black water, standardized use of strong acid-base reagents (such as bleach wastewater detection reagents), and key protection points for high-temperature digestion processes; Clarify the sampling standards, sample preservation and pretreatment processes (such as dilution of high concentration wastewater, filtration of suspended solids, pH adjustment, etc.) for different discharge outlets such as pulp making, papermaking, and wastewater treatment in enterprises, and explain the requirements for determining the sampling frequency according to the production cycle (sampling every 2 hours within 8 hours of production cycle and every 4 hours after 8 hours).
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 wastewater in papermaking enterprises, focusing on the key operating steps and exclusive precautions for wastewater detection in papermaking:
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 pulp black water) and suspended solids 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 calibration and save parameters. Emphasize the adjustment points of shaking the calibration solution before use, shortening the calibration cycle due to water quality fluctuations in paper wastewater detection, and avoiding fiber pollution in the detection channel operation specifications.
Sample testing: demonstrate the exclusive pretreatment process for papermaking wastewater, such as gradient dilution of pulp black water, filtration of suspended solids in papermaking white water, etc; Explain the specifications for adding pre made reagents, the precise extraction and digestion steps for water samples of different concentrations, and explain the multifunctional intelligent digestion instrument for COD and BOD? Key points for setting parameters for different indicators; Put the processed sample into the instrument for testing, demonstrate the methods of data stability judgment and abnormal data review, and focus on explaining the dilution conversion points of high concentration wastewater testing results.
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, suspended solids) in sequence. The instructor provides tour guidance to correct any non-standard operations, such as fiber contamination in the detection channel, errors in calibration solution preparation, improper dilution ratio of high concentration wastewater, and filtration of suspended solids.
Sample testing exercise: Using actual papermaking wastewater samples from the enterprise (pulp black water, papermaking white water, and treated wastewater comparison samples), complete the entire process from sample specific 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 sewage treatment system and production process parameters.
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 "precise dilution method of high concentration pulping black water", "techniques for improving the filtration efficiency of suspended solids in papermaking white water", "emergency response process for exceeding detection data", etc. The instructor will answer them one by one and provide extended explanations based on sewage testing cases in the papermaking industry.
（4） Assessment and Summary Session (16:10-17:00)
Practical assessment: Randomly select one characteristic detection index (COD/BOD?/suspended solids/total phosphorus) for papermaking wastewater in groups. Use actual papermaking wastewater samples from the enterprise to complete the entire process of exclusive pretreatment, calibration, detection, data export and conversion. The instructor will score based on operational norms, data accuracy, abnormal situation handling ability and other dimensions, 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 paper wastewater detection. They are able to independently complete the full process detection of wastewater characteristic indicators in various production processes of the enterprise, especially mastering exclusive pretreatment techniques such as high concentration black water dilution and white water suspended solids filtration. The operational standardization and data accuracy meet the expected requirements, solving the problems of "large deviation in high concentration wastewater detection" and "interference of suspended solids detection results" previously.
Compliance guarantee: After the training, the instrument was quickly put into the daily detection work of enterprise sewage, realizing the monitoring requirements of sampling and daily inspection of discharge ports after treatment of key process wastewater such as pulp and paper making according to the production cycle. The detection efficiency has increased by more than 70% compared to previous third-party testing, and the data stability has been significantly enhanced, providing 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 enterprises and instrument suppliers has been deepened, and a long-term technical exchange channel has been established, laying a good foundation for solving complex papermaking wastewater 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 papermaking wastewater (high concentration, high suspended solids, and large water quality fluctuations) with environmental compliance needs, focuses on core characteristic indicator testing, and adds exclusive pretreatment content such as dilution of high concentration wastewater and filtration of suspended solids, avoiding the "general but not precise" nature of generic training and improving the effectiveness of the 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: efficient collaboration between enterprises and suppliers ensures sufficient preparation of training venues, equipment, consumables, and other resources. Professional lectures and subsequent technical support from 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, targeted at precise detection of high concentration pulp wastewater and BOD in complex water quality backgrounds? Conduct advanced specialized training on difficult issues such as 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.
