1 Scope
This document sets out the objectives of water quality management in reclaimed water plants . Wipe the application, testing and monitoring and reporting and system.
This document applies to the water quality management of reclaimed water plant.
2 normative reference documents
The following documents in the content of the normative references through the text and constitute the essential provisions of this document. Among them, note the date of the cited documents, only the date of the corresponding version applicable to this document; do not note the date of the cited documents, its latest version (including all the revision of the list) applicable to this document.
GB8978 Standard for Integrated Sewage Discharge
GB18918 Standard for the Discharge of Pollutants from Urban Sewage Treatment Plants
GB/T 18919 Classification of urban wastewater recycling
GB/T 18920 Urban wastewater recycling Water quality of urban miscellaneous water
GB/T 18921 Water quality of urban wastewater recycling for scenic environment
GB/T19538 Hazard Analysis and Critical Control Point (HACCP) system and its application guide
GB/T 19772 Water quality of groundwater recharge for urban wastewater reclamation
GB/T 19923 Water quality of industrial water for urban wastewater recycling
GB20922 Water quality of urban wastewater reuse for agricultural irrigation
GB/T 21534 Water conservation terminology
GB/T 25499 Water quality of urban wastewater reuse for greenfield irrigation
GB/T 27025 General requirements for testing and calibration laboratory capacity
GB/T 31962 Water quality standards for sewage discharged into urban sewers
GB 50335 Design specifications for urban wastewater recycling projects
HJ 493 Technical provisions for the preservation and management of water quality sampling samples
HJ 494 Technical guidance on water quality sampling
HJ 495 Technical provisions for the design of water quality sampling programmes
3 Terms and definitions.
GB/T 19538 and GB/T 21534 defined as well as the following terms and definitions apply to this document.
3.1
Reclaimed water plantswater reclamation plants
To sewage or meet the discharge standards GB8978 or GB18918 sewage treatment plant water as a source of water, the production and supply of reclaimed water enterprises and units.
3.2
Water quality management
water quality management
To protect, control and improve water quality for the purpose of reclaimed water plant treatment process in accordance with the key aspects of water quality requirements to implement the management process.
3.3
Critical control point;CCP
For a risk can be controlled, and the control to prevent, eliminate the risk or reduce it to an acceptable level of process or link.
[Source: GB/T 19538- 2004, 3.5, with modifications]
3.4
Risk analysis and critical control point (HACCP) system
For water reclamation plants, a process management system that identifies, analyzes, evaluates and controls the links and operations that lead to a - risk and its generation.
[Source: GB/T 19538- 2004, 3.9, with modifications]
4 Water quality management objectives
4.1 According to the characteristics of water sources, water quality standards and user requirements, the development of reasonable, clear water quality management objectives of the reclaimed water plant.
4.2 water quality management objectives include water quality of treatment units, plant storage unit water quality, water quality of recycled water plants and water quality at the user end.
4.3 for a treatment unit, should be based on its subsequent treatment unit water quality requirements, to determine its management objectives, in order to ensure the stable and efficient operation of the subsequent treatment unit.
4.4 for the plant storage unit, should be based on the water quality requirements of the water reclamation plant, to determine its management objectives.
4.5 for the reclaimed water plant water quality, should be based on the water quality requirements of the customer side, and take into account the changes in water quality during the transmission and distribution of the pipe network (such as the decay of chlorine residual and microbial growth, etc.), to determine its management objectives.
4.6 recycled water plant water and user-side water quality control objectives, including water quality indicators and indicators of the rate of compliance, fluctuation rate, etc., in order to meet the requirements of its relevant water quality standards, but also according to the use of recycled water and user requirements, pay attention to chemical stability, biological stability, trace toxic and harmful pollutants and other water quality safety indicators.
4.7 When recycled water is used for a variety of purposes at the same time, water quality can be determined by the highest water quality standards or quality of water supply; can also be determined by the water quality standards of the largest users. Individual users with higher water quality requirements can supplement their own treatment to meet their water quality requirements.
4.8 According to the user use process found in the problem, timely adjustment and improvement of water quality management objectives, including the increase or decrease of water quality indicators and meet the standard rate, fluctuation rate adjustment.
4.9 According to the development of technology, the latest research results and user changes, timely adjustment and improvement of water quality management objectives of recycled water plant.
5 water quality management measures
5.1 General requirements
5.1.1 According to the characteristics of water sources, treatment processes and water quality management objectives, based on risk analysis and key control points (HACCP) system (see Appendix A and Appendix B), the development of recycled water quality management measures.
5.1.2 water quality management measures including risk identification, key control points set and management, water quality abnormal response measures, sustainable improvement, emergency management, etc.
5.2 Risk identification
Should be for the water source, treatment process units, storage and water and other aspects of the important risk factors and risk events, according to the requirements of GB/T19538, analysis and identification, the establishment of risk analysis list.
5.3 Key control points set and management
5.4 Water quality abnormal response measures
5.4.1 for different situations, the establishment of the whole process, the systemic response to water quality abnormalities.
5.4.2 When the key control points of water quality indicators and control parameters beyond the target range, should be taken in time to respond to measures, so that it is as soon as possible to restore normal operation.
5.4.3 can be used to sample analysis, statistical analysis and other methods to evaluate the effectiveness of response measures.
5.5 Sustainable improvement
5.5.1 continue to improve the suitability, adequacy and effectiveness of water quality management measures.
5.5.2 to establish a sound quality management system, to achieve continuous improvement in water quality management.
5.6 Emergency management
5.6.1 to establish and improve water quality monitoring and early warning system, the development of water quantity and water quality emergencies emergency plan and regular emergency exercises.
5.6.2 Establish emergency liaison mechanisms to improve the speed of response and response capacity.
5.6.3 When there is an emergency, according to the emergency plan should quickly take effective measures to deal with and promptly reported.
5.6.4 In the process of accident disposal, should take into account the water quality protection and water supply stability requirements.
5.6.5 When the water quality changes significantly, should increase the frequency of detection, and according to the need to increase water quality monitoring points. Monitoring indicators or adjust the treatment
Process.
5.6.6 When the water quality test results continue to exceed the standard, promptly identify the causes, measures, and reported to higher authorities and inform the user.
5.6.7 Equipped with a backup water source to respond to emergencies, to protect the basic needs of recycled water supply.
5.6.8 to deal with water quality incidents summary and data accumulation, and constantly improve the emergency plan.
6 Water quality monitoring and reporting
6.1 General requirements
6.1.1 According to water quality management objectives, the development and standardization of water quality monitoring content, clear detection indicators and frequency. Monitoring methods, etc.
6.1.2 According to the provisions of HJ 494 and HJ 495, the development of sampling design and organization and implementation of the program; according to the provisions of HJ 493, the development of water samples preservation and management requirements.
6.1.3 recycled water plants can be tested with qualified institutions to jointly undertake water quality testing work.
6.1.4 According to water quality monitoring requirements, clear water quality monitoring capabilities, with the appropriate personnel, equipment, facilities and environment.
6.1.5 for different sources of recycled water, according to GB 8978, GB 18918 or GB/T 31962 requirements, the development of recycled water plant water quality testing program.
6.1.6 According to the process operation control requirements and water quality management objectives, according to GB/T 18919. GB/T 18920. GB/T 18921.
GB/T19772,GB/T19923.GB20922.GB/T25499 and other national standards or the requirements of the relevant local standards, to determine the water quality testing projects and frequency of reclaimed water plants.
6.2 Data quality assurance
6.2.1 According to GB/T27025 and national. Industry-related regulations, the calibration of water quality testing results of reclaimed water plants to ensure data quality.
6.2.2 implementation of internal quality inspection and control, water quality testing room is appropriate to regularly use blank test, internal comparison test and other methods to verify the comparison.
6.2.3 In accordance with external quality control provisions, strict data quality management. Water quality testing process involves the measurement of instruments and apparatus according to the provisions of the measurement body should be regularly measured and certified before use, the daily use of the process of regular calibration and maintenance.
6.3 Water quality report
6.3.1 Water quality results should be established to analyse, report and publish the system.
6.3.2 Water quality testing reports should be issued on a regular basis, reported to the higher authorities, and announced to the community.
7 Water quality management system
7.1 General requirements
7.1.1 According to water quality management objectives, the relevant administrative departments in charge of supervision and national standards, the development of a systematic, comprehensive and standardized water quality management system.
7.1.2 Water quality management system, including water quality management post responsibility. File information management methods.
7.1.3 water quality management system to the higher authorities for the record, and to the reclaimed water users and public announcements.
7.2 Water quality management personnel (institutions)
7.2.1 set up water quality management personnel (institutions) and water quality testing personnel (institutions), the establishment of a sound water quality management responsibility system, clear job responsibilities.
7.2.2 Water quality management personnel (institutions) is responsible for the development of water quality management plan, the implementation of work arrangements, water quality results analysis, reporting and publishing.
7.2.3 Water quality management personnel in the post before, should receive professional vocational skills training.
7.2.4 Water quality testing personnel (agencies) is responsible for the detection of water quality and data quality assurance.
7.2.5 Water quality testing personnel need to go through the water quality inspection, testing professional and technical training after passing the post, to obtain the appropriate level of operational skills qualification certificate.
7.3 File and data management
7.3.1 to establish a sound water quality file management system, improve water quality testing and monitoring of original records, summary tables, test reports, statistical tables and other types of archival data management.
7.3.2 Water quality management in all procedures and evenness need to be comprehensive and accurate records, backup and archiving. Ensure that sampling records. Laboratory records, data analysis reports and related water quality management information is accurate and complete, clear handwriting, true and effective.
1 Scope
2 normative reference documents
3 Terms and definitions.
4 Water quality management objectives
5 water quality management measures
6 Water quality monitoring and reporting
7 Water quality management system
