(A)general waste disposal

1."Recyclables: Classified into paper, bottles and cans, and glass. If there are oil stains or contamination, clean them and place them in the laboratory recycling area (Figure 1) for sorting and storage before transporting to the school recycling area for centralized processing."

(Figure 1) Recycling Area

2.general waste
After each class, the assigned student on duty gathers all the trash and places it in the school waste bin, which is then centrally processed. 

(B)The classification and disposal of experimental waste

1.Aqueous Solution Waste:
Storage: Store for later outsourcing and treatment.
Disposal: Outsource for proper treatment.

2.Organic Liquid Waste:
Storage: Store for later outsourcing and treatment.
Disposal: Outsource for proper treatment.

3.Hazardous Gas Emissions:
Control: Use local exhaust systems and overall ventilation equipment.
Disposal: Implement local exhaust devices and overall ventilation systems to manage and mitigate hazardous gas emissions.

　

一、The treatment methods for aqueous solution waste:

1.
The commonly used aqueous solutions in this laboratory, such as saturated saline solution, sulfuric acid, hydrochloric acid, sodium hydroxide, sodium bicarbonate, calcium chloride, magnesium sulfate, etc., can be diluted with a large amount of water and discharged to the school's wastewater treatment tank for processing.

2.The aqueous waste generated during other extraction processes, containing small amounts of organic solvents, is classified according to the waste compatibility chart and poured into the aqueous waste container.

(Figure 2) Fume Hood for Waste Liquid Treatment

二、The treatment methods for organic liquid waste

1.In the organic chemistry laboratory, there is a covered "Rinse Solution Collection Bottle" beside each sink, intended for collecting acetone rinse solution. After each experiment, the assigned student on duty gathers them and centralizes the collection in the waste liquid treatment fume hood (Figure 2). The collected solutions are then classified according to the waste compatibility chart and poured into the "Non-halogenated Organic Waste" container.

2.The organic waste generated during the experimental process is divided into halogenated (e.g., organic solutions containing dichloromethane) and non-halogenated (e.g., ether, acetone, hexane). These must be poured into graduated cylinders inside the waste treatment fume hood. Throughout the experiment, the fume hood exhaust system should remain operational. At the end of the experiment, the assigned student on duty will systematically pour the waste from the graduated cylinders into the waste container. After proper handling, the waste container lid should be securely closed before turning off the fume hood exhaust system.

3.Once the full waste container is clearly labeled, it is temporarily stored beneath the fume hood in a storage cabinet. It will remain there until further notice from the facility management, indicating when it should be outsourced for transportation and disposal.
 

三、Toxic Gas Emission Treatment Methods

Accessing high-concentration and highly volatile organic solvents should be conducted in the fume hood (Figure 3).

 (Figure 3) Volatile Drugs and Organic Solvents.

  In addition, above each workstation in the organic chemistry laboratory, there is an exhaust vent (Figure 4). Students can use this ventilation system to promptly remove toxic gas generated during the experimental process. The ventilation equipment is also regularly inspected (Figure 5) to ensure its effectiveness in removing fumes.

              (Figure 4)                                           (Figure 5)