Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed with a view to implementing the Ecology Environmental Protection Law of the People's Republic of China and the Law of the People's Republic of China on Prevention and Control of Water Pollution, protecting ecological environment, guaranteeing human health, monitoring the pollution source and pollutant emission and regulating the technical requirements for installation of wastewater on-line monitoring system.
This standard specifies the component of wastewater on-line monitoring system, construction requirements for wastewater discharge outlet, flow monitoring unit, monitoring station house, automatic water sampling unit and data control unit, installation requirements for flowmeter, automatic water sampler and water quality automatic analyzer, as well as the technical requirements on commissioning and test run of the wastewater on-line monitoring system.
This standard is the revision of HJ/T 353 -2007 Technical guidelines of wastewater on-line monitoring equipments and installation (on trial).
This standard was issued in 2007 for the first time, and the original drafting organization is Shanghai Environmental Monitoring Center. This edition is the first revision.
The following main contents have been revised with respect to HJ/T353-2007:
——It is renamed as “Technical specification for installation of wastewater on-line monitoring system (CODcr, NH3-N et al.)”;
——The installation requirements for data acquisition and transmission instrument and UV automatic water quality monitor;
——The requirements for the component of wastewater on-line monitoring system are added;
——The construction requirements for flow monitoring unit, automatic water sampling unit and data control unit are added;
——The installation requirements for magnetic flowmeter device and water quality automatic analyzer of TN are added;
——The relevant technical drawings and tables are added, such as monitoring station house layout drawing (recommended), commissioning report and test run report.
——The construction requirements for wastewater discharge outlet and monitoring station house are modified;
——The installation requirements for automatic water sampler, ultrasonic wave open-channel meter, water quality automatic analyzers of chemical oxygen demand (CODcr), total organic carbon (TOC), ammonia nitrogen (NH3-N), total phosphorus (TP) and pH as well as thermometer.
HJ/T 353-2007 Technical guidelines of wastewater on-line monitoring equipments and installation (on trial) shall be abolished as of the implementation date of this standard.
For this standard, Annex A is normative and Annexes B～ G are informative.
This standard is formulated under the organization of the Department of Ecological Environment Monitoring and the Department of Laws, Regulations and Standards under the Ministry of Ecology and Environment of the People's Republic of China.
This standard was approved by the Ministry of Ecology and Environment on December 24, 2019.
This standard shall be implemented from March 24, 2020.
The Ministry of Ecology and Environment is responsible for the explanation of this standard.
Technical specification for installation of wastewater on-line monitoring system (CODCr, NH3-N et al.)
1 Scope
This standard specifies the component of wastewater on-line monitoring system, construction requirements for wastewater discharge outlet, flow monitoring unit, monitoring station house, automatic water sampling unit and data control unit, installation requirements for flowmeter, automatic water sampler and water quality automatic analyzer, as well as the technical requirements on commissioning and test run of the wastewater on-line monitoring system.
This standard is applicable to the construction of all components of the wastewater on-line monitoring system as well as the installation, commissioning and test run of wastewater on-line monitoring equipment adopted such as flowmeter, automatic water sampler, thermometer, and water quality automatic analyzers of chemical oxygen demand (CODcr), total organic carbon (TOC), ammonia nitrogen (NH3-N), total phosphorus (TP), total nitrogen (TN) and pH.
The wastewater on-line monitoring system specified in this standard is applicable to the on-line monitoring of chemical oxygen demand (CODcr), ammonia nitrogen (NH3-N), total phosphorus (TP), total nitrogen (TN), pH, temperature and flow monitoring factors.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For undated references, the latest edition applies.
GB 15562.1 Graphical signs for environmental protection-Discharge outlet(source)
GB 50057 Design code for protection of structures against lightning
GB 50093 Code for construction and acceptance of automation instrumentation engineering
GB 50168 Code for construction and acceptance of cable system electric equipment installation engineering
GB 50169 Code for construction and acceptance of grounding connection electric equipment installation engineering
GB/T 17214 Industrial-process measurement and control equipment - Operating conditions - Part 1: Climatic conditions
HJ 15 Technical requirements and inspection methods for ultrasonic wave open-channel wastewater meter
HJ 91.1 Technical specification for wastewater monitoring
HJ 101 Technical requirements and inspection methods for ammonia nitrogen water quality on-line automatic analyzer
HJ 212 Standard for data communication of pollution source on-line monitoring system
HJ 354-2019 Technical specification for acceptance of wastewater on-line monitoring system (CODCr, NH3-N et al.)
HJ 355-2019 Technical specification for operation of wastewater on-line monitoring system (CODCr, NH3-N et al.)
HJ 377 Technical requirements and inspection methods for chemical oxygen demand (CODcr) water quality on-line automatic monitoring
HJ 477 Technical requirements for pollution source on-line automatic monitoring data acquisition and transmission instrument
HJ 828 Water quality - Determination of the chemical oxygen demand - Dichromate method
HJ/T 70 High-chlorine wastewater - Determination of chemical oxygen demand - Chlorine gas calibration
HJ/T 96 Technical requirement for water quality automatic analyzer of pH
HJ/T 102 Technical requirement for water quality automatic analyzer of total nitrogen
HJ/T 103 Technical requirement for water quality automatic analyzer of total phosphorus
HJ/T 104 Technical requirement for water quality automatic analyzer of total organic carbon
HJ/T 367 Technical requirements for environmental protection product - Electromagnetic pipe flowmeters
HJ/T 372 Technical requirements and test procedures for water quality automatic sampler
CJ/T 3008.1 Standards for municipal wastewater discharge measurement - Triangular notch (V notch) thin plate weir
CJ/T 3008.2 Standards for municipal wastewater discharge measurement - Rectangular notch thin-plate weir
CJ/T 3008.3 Standards for municipal wastewater discharge measurement - Parshall flume
DGJ 08-114 Technical regulations for temporary work operation
JJG 711 Weirs and flumes for flow measurement (Trail)
JJF 1048 Calibration specification of data acquisition system
3 Terms and definitions
3.1
wastewater on-line monitoring system
system consisting of software and hardware facilities with the functions of wastewater flow monitoring, wastewater water sampling, analysis, and analysis data statistics and uploading
3.2
wastewater on-line monitoring equipment
instruments and meters in the wastewater on-line monitoring system which are used in the continuous on-line monitoring of pollutant concentration and discharge
3.3
instantaneous sample
water sample sampled once at a time at certain sampling point
3.4
composite sample
mixture of water samples sampled continuously or at different times at the same sampling point
3.5
automatic water sampling unit
unit in the wastewater on-line monitoring system which is used to acquiring such real-time sample and composite sample, standard-exceeding retention sample, retention sample for parallel monitoring, and retention sample for comparison monitoring as used for analysis and testing with wastewater on-line monitoring equipment
3.6
data control unit
unit for realizing the functions of controlling the linkage of the instrument and equipment in the entire wastewater on-line monitoring system, automatically completing the acquisition, reduction, output and upload to the monitoring center platform of the data from the wastewater on-line monitoring equipment and accepting the command of monitoring center platform to control the operation of the wastewater on-line monitoring equipment
4 Component of wastewater on-line monitoring system
The wastewater on-line monitoring system is mainly composed of four parts: flow monitoring unit, automatic water sampling unit, wastewater on-line monitoring equipment and data control unit together with corresponding building facilities, see Figure 1.
Figure 1 Schematic diagram for component of wastewater on-line monitoring system
Note: According to the different water samples discharged at the site of the pollution source, CODCr parameters may be determined by the water quality automatic analyzer of CODCr or the water quality automatic analyzer of TOC. For the water quality automatic analyzer of TOC, it reports the CODCr monitoring value through the conversion factor (Annex A), and installation, commissioning, test run, operation and maintenance shall be carried out by reference to the method for the water quality automatic analyzer of CODCr.
5 Construction requirements
5.1 Wastewater discharge outlet
5.1.1 The wastewater discharge outlet position shall be selected according to the layout principle specified in HJ 91.1.
5.1.2 The discharge outlet shall be equipped with graphical signs for environmental protection in accordance with those specified in GB 15562.1.
5.1.3 The discharge outlet shall be able to meet the construction requirements for flow monitoring unit.
5.1.4 The discharge outlet shall be able to meet the construction requirements for automatic water sampling unit.
5.1.5 In the case of sewage discharge through concealed pipes or closed channels, it is necessary to set up shaft that meets the requirements of manual sampling or construct an open channel. If the sewage surface is more than 1 m below the ground, a sampling step or ladder frame shall be equipped. Pressure pipe discharge outlet shall be equipped with sample cocks meeting the requirements of manual sampling.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Component of wastewater on-line monitoring system
5 Construction requirements
6 Installation requirements for wastewater on-line monitoring equipment
7 Debugging requirements
8 Requirements for trial operation
Annex A (Normative) Method for determining conversion coefficient between TOC and CODCr
Annex B (Informative) Layout of monitoring station house
Annex C (Informative) Statistics of wastewater on-line monitoring system
Annex D (Informative) Code for installation of standard measuring weir (flume)
Annex E (Informative) Enterprise sewage and on-line monitoring equipment
Annex F (Informative) Commissioning report of wastewater on-line monitoring equipment
Annex G (Informative) Commissioning report of wastewater on-line monitoring system
