HJ 356-2019 in English

VALID

Technical specification for data validity of wastewater on-line monitoring system (CODCr, NH3-N et al.)

Issued on:2019-12-24
Implemented on:2020-03-24
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $150.00
$146.00

Standard No:	HJ 356-2019
Document status:	VALID
Title in English:	Technical specification for data validity of wastewater on-line monitoring system (CODCr, NH3-N et al.)
Title in Chinese:	水污染源在线监测系统（CODCr、NH3-N 等）数据有效性判别技术规范
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2019-12-24
Implemented on:	2020-03-24
Superseding:	HJ/T 356-2007 Technical specifications for validity of wastewater on-line monitoring data(on trial)
Professional Classification:	HJ-Environment
Related Keywords:	data validity data statistics invalid data parallel measurement data absolute error calculation formula valid data integrity rate
Related Topics:	online Online Monitoring Online monitoring system effectiveness Online Monitoring Trial Implementation of Technical Specifications for Data Validity Judgment of Online Monitoring System of Water Pollution Sources nh3-n- Monitoring of pollution sources at home and abroad online standards Organic Pollutants Online Monitoring System Online monitoring system Data Validity Level 3 Water Pollution Data equal number online system source of water pollution nh3-n UV nh3-n in water Monitoring Online System distinguish NH3 N source of water pollution nh3-n Water Pollution Data hj356 Domestic Water Pollution Data Water quality nh3-n Water Pollution Data Water Pollution Data hj 356 2007 nh3-n medium 3 hj/t 356 Water Pollution Monitoring Data nh3-n in water quality hj 356 Pollution source online monitoring technology Online monitoring data and on-site monitoring data nh3-n in water data validity Judgment online monitoringkekao PCR data validity China water resources pollution data Wastewater online monitoring comparison frequency Organic soil identification standards What are the relevant standards for pollution source monitoring? Rainwater online monitoring technology Benzene online monitoring technology

本标准规定了利用水污染源在线监测系统获取的化学需氧量（CODCr）、氨氮（NH3-N）、
总磷（TP）、总氮（TN）、pH 值、温度和流量等监测数据的有效性判别流程、数据有效性判别指标、数据有效性判别方法、有效均值的计算以及无效数据的处理。
本标准适用于利用水污染源在线监测系统获取的化学需氧量（CODCr）、氨氮（NH3-N）、总磷（TP）、总氮（TN）、pH 值、温度和流量监测数据的有效性判别。

Introduction

Core changes in the standard revision

Dimensions	2007 Edition	2019 Edition
Scope of application	CODcr, NH3-N	Added 7 new parameters including TP, TN, pH, etc.
Discrimination process	Not systematized	Establish a complete flow chart (Figure 1)
Data statistics	Daily average only	Added calculation of effective monthly average

Analysis of key technical indicators

5.1 Comparison test of actual water samples

For equipment such as CODcr automatic analyzer, requirements:

At least 3 sets of parallel measurement data
Absolute error calculation formula: ΔC=|x_i-B_i|
Relative error limit refers to Table 1 of HJ 355-2019

Application case

The comparison test of NH3-N online monitoring instrument in a sewage treatment plant showed that the laboratory value was 8.2mg/L and the instrument value was 7.9mg/L, then the absolute error was 0.3mg/L (meeting the requirement of ≤10%)

Implementation suggestions

Key points of operation and maintenance management

Establish a regular comparison system for open channel flowmeters (new requirements)
Invalid data must be marked with reasons and original records must be retained
Monthly valid data integrity rate ≥ 75%

Data processing specifications

Correction value for data below the detection limit:

CODcr: 2mg/L
NH3-N: 0.01mg/L
TP: 0.005mg/L

More samples: QC/T 942-2021 GB 50021-2001(2009) JGJ 94-2008

Sample only — not a preview of HJ 356-2019

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