HJ 101-2019 in English
VALIDTechnical specifications and test procedures for water quality on-line automatic monitoring equipment of ammonia
- Issued on:2019-12-24
- Implemented on:2020-03-24
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
本标准规定了氨氮水质在线自动监测仪的技术要求、性能指标及检测方法。
本标准适用于地下水、地表水、生活污水和工业废水的氨氮水质在线自动监测仪的指导生产设计、指导应用选型和开展性能检测。
氨氮水质在线自动监测仪的量程范围应包含0.1 mg/L～150 mg/L，可满足地下水、地表水、生活污水和工业废水的监测需求。
Introduction
Background of Standard Revision and Technological Evolution
This standard replaces the 2003 version of HJ/T 101 standard. The main revisions include: canceling the instrument principle restriction (no longer distinguishing between electrode method and photometry), expanding the detection range to 0.1-150 mg/L, and adding 6 indicators such as voltage/pH/temperature influence test, reflecting the development trend of my country's environmental monitoring technology from single parameter detection to multi-dimensional performance evaluation.
Comparative analysis of core performance indicators
| Indicators | Requirements of the 2003 version | Requirements of the 2019 version | Technical improvement |
|---|---|---|---|
| Detection range | Not clearly distinguished | Basic range 0.1-10mg/L Extended range 10-150mg/L | Covering the entire scene from surface water to industrial wastewater |
| Indication error | ±10% | ±3%~8% (segmented requirements) | Accuracy improved by 2-3 times |
| Maintenance cycle | 72 hours | 168 hours | Reduce operation and maintenance costs |
Analysis of key technical requirements
4.1 Instrument composition architecture
The standard stipulates that the Ammonia Nitrogen Water Quality Online Automatic Monitoring Instrument must include a sampling/metering unit, a reagent storage unit (reagent storage capacity ≥168 samples), an analysis and detection unit (detection cycle ≤60min) and a control unit with three-level authority management.
5.5 Key Detection Methods
- Memory effect detection: The deviation is required to be ≤0.3mg/L when switching from high concentration (8mg/L) to low concentration (2mg/L)
- Ambient temperature influence: The measurement error is ≤5% under a temperature difference of 5℃-40℃
- Actual water sample comparison: The HJ 535/HJ 536 laboratory method is used as the benchmark
Implementation suggestions and application cases
Application example of sewage treatment plant
After a certain urban sewage treatment plant selected an ammonia nitrogen online monitor that complies with HJ 101-2019:
- The accuracy of high alkalinity influent data was ensured through pH influence test (±6%)
- The impact load of industrial wastewater was successfully captured by using the extended detection range (150mg/L)
- The minimum maintenance cycle of 168 hours reduces the operation and maintenance labor cost by 30%
Notes on the implementation of the standard
1. Newly installed equipment must comply with this standard from March 24, 2020
2. Key inspection of new indicators: quantitative lower limit ≤0.15mg/L, consistency ≥90%
3. Waste liquid treatment must comply with the supporting requirements of the "Hazardous Waste Storage Pollution Control Standard"
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