In daily life, people may have a better understanding of food testing, which is also relatively easy to understand. They have little or no understanding of environmental testing, such as sewage testing and wastewater testing. Environmental testing is a behavioral method of monitoring and detecting factors that may cause pollution or harm to the environment, and ordinary people are rarely exposed to such testing. Environmental testing generally occurs in units such as the chemical industry, industry, manufacturing, and medical institutions, and is carried out by dedicated personnel on a regular basis Medical wastewater testing is an important component of environmental testing. Medical wastewater refers to the diagnosis, treatment, domestic and fecal wastewater discharged from outpatient, ward, operating room, various testing rooms, pathological dissection rooms, radiation rooms, laundry rooms, morgues, and other places in medical institutions. When other sewage from medical institutions is mixed with the above-mentioned sewage and discharged, it is considered as medical institution wastewater The testing standard for medical wastewater is GB 18466 "National Standard for Water Pollutant Discharge from Medical Institutions of the People's Republic of China". According to the different attributes of hospitals, the terminal discharge location of treated medical wastewater is different, and the pollutant discharge limit values in medical wastewater are also different

The sewage discharge of infectious diseases and tuberculosis medical institutions shall all comply with the provisions in Table 1 of the standard (see the figure below, and see the standard for details); The sewage discharge of comprehensive medical institutions and other medical institutions with county-level or above or 20 beds or above shall comply with the provisions in Table 2 of the standards (see the following figure for details, and the detailed content can be found in the standards) After treatment, medical wastewater can be directly or indirectly discharged into surface water bodies and sea areas, or discharged into sewers with normally operating urban secondary sewage treatment plants. Medical wastewater discharged into the sewage of the treatment plant shall comply with pre-treatment standards, while those directly or indirectly discharged into surface water bodies and sea areas shall comply with stricter discharge standards. Sewage discharge from medical institutions for infectious diseases and tuberculosis is excluded