The examination of industrial wastewater treatment work permit is usually organized by relevant vocational training institutions or environmental protection departments, and the specific examination content and form may vary from region to region and institutions. Generally speaking, the exam will cover the following aspects:

1. Basic theory and knowledge of industrial wastewater treatment, including the source, nature and treatment methods of wastewater;

2. Operation and maintenance of industrial wastewater treatment equipment such as sedimentation tank, biochemical tank and filtration tank;

3. Industrial wastewater treatment related laws and standards such as Integrated Wastewater Discharge Standard and Technical Specification for Industrial Wastewater Treatment Engineering;

4. Safe operation procedures for industrial wastewater treatment, such as preventing chemical leakage and electric shock.

The methods of studying the work permit for industrial wastewater treatment mainly include the following points:

1. Attending specialized vocational training courses, usually taught by experienced teachers or engineers, can help you systematically learn the knowledge and skills of industrial wastewater treatment;

2. Read relevant books and materials, such as industrial wastewater treatment technology and industrial wastewater treatment engineering;

3. Practice, if you have the opportunity, you can practice or work in the actual industrial wastewater treatment project to improve your skills through practice;

4. Taking the mock exam can help you understand the form and content of the exam and improve your ability to take the exam.

Generally speaking, obtaining a work permit for industrial wastewater treatment requires a certain understanding and mastery of the theoretical knowledge and practical operation of industrial wastewater treatment, as well as a certain knowledge of regulations and standards. Through systematic study and practice, improve your skills and pass the exam smoothly.