T/CNS 8-2018 in English

Scope

This standard is named "Technical Specification for Electron Beam Treatment of Wastewater from Textile and Pulp & Paper Industries." It summarizes the research results and practical experiences on using electron beam treatment technology in wastewater from these industries both domestically and internationally. This standard, based on the guidelines issued by the U.S. Environmental Protection Agency regarding the use and disposal of urban sludge, provides overall requirements for the design, construction, and operation management of electron beam treatment projects for textile and pulp & paper industry wastewater. It can also serve as a reference for other electron beam wastewater treatment projects.

(1) Scope: In addition to the original scope, this standard now includes the principles of electron beam wastewater treatment. The scope specifies that this standard outlines general requirements for electron beam treatment of textile and pulp & paper industry wastewater, including technical requirements for electronic accelerators, wastewater transportation systems, process control, quality control, and operation and maintenance management.

(2) Normative References: This part lists the national standards, environmental standards, and group standards referenced in this standard. In total, 9 national standards, 2 environmental standards, and 1 group standard are referred to.

(3) Terms and Definitions: This section provides definitions of common professional terms used in the field of electron beam irradiation and wastewater treatment. It also explains specific terms that require special clarification within this standard. To avoid unnecessary repetition and ensure clarity, some commonly used simple terms and non-specific terms are not listed; these can be found in other standards or dictionaries.

(4) General Requirements: This section briefly describes the technical requirements for the design, construction, and management of electron beam treatment projects for textile and pulp & paper industry wastewater. It provides an overall description of the principles and structure of this standard.

(5) Process and Equipment: This part is divided into process and equipment sections. The process includes design aspects such as process design, dose design, design of electronic beam wastewater treatment capacity, and wastewater transportation system design. After multiple rounds of standard calibration and verification, specific design bases are selected. The equipment section covers technical requirements for the electronic accelerator and wastewater transportation systems, setting performance and material limitations for various components. Finally, through design confirmation, it ensures that all technical parameters meet the design requirements, forming and saving design documents.

(6) Process Control and Quality Control: This part includes installation verification, process validation, review and approval, routine monitoring control, wastewater discharge, change assessment and documentation. It controls and evaluates the entire electron beam treatment project for textile and pulp & paper industry wastewater to ensure that the effluent meets design requirements and is stable.

(7) Operation and Maintenance Management: This section primarily includes requirements for operation units and personnel. Since this standard not only covers the operation and maintenance of electronic accelerator irradiation but also includes the management of the wastewater treatment project, it sets corresponding requirements from two perspectives.

(8) Emergency Management: It mainly includes radiation protection and emergency management for water treatment engineering, including emergency response plans, training, drills, accident handling, and reporting.

(9) Appendix A: Water Quality Testing Methods and Basis. Since the effectiveness of an electron beam treatment project for textile and pulp & paper industry wastewater is confirmed by final effluent quality indicators, accurate testing of the discharged water quality during operation is crucial. This appendix lists some common water quality parameters and their detection methods to ensure consistency in effluent quality.

(10) Appendix B: Depth Dose Distribution Curves of Electron Beams in Water. It provides depth-dose distribution curves for electron beams with energies ranging from 1.0-5.0 MeV in different depths of water, which can serve as a basis for designing the wastewater transportation system under the beam.

(11) Appendix C: Methods for Measuring Film Thickness. The thickness and uniformity of the film affect the treatment efficiency; therefore, strict control over the film thickness is required during design to ensure its uniform distribution.