First, let us clarify the definition of wastewater. Wastewater refers to the aggregate of water discharged from industrial facilities, public premises, and other sources, as well as runoff rainwater. It primarily includes industrial wastewater, initial rainwater runoff, and other non-reusable water streams. This article addresses the treatment methods for wastewater and the potential hazards of untreated wastewater.

Wastewater is defined as water that cannot be recycled even after undergoing certain technical treatments, or water whose purification difficulty post-primary pollution fails to meet relevant standards. Professional technicians typically treat wastewater through disinfection and sterilization processes. Notably, Wastewater Monitoring is an indispensable step, as it serves to verify whether all indicators of the treated wastewater comply with regulatory standards.

The hazards of untreated wastewater can be analyzed from the following aspects:  

1.Surface Water Pollution: Direct discharge of industrial wastewater into rivers and lakes contaminates surface water. For instance, highly toxic components may cause the death of aquatic organisms, and in severe cases, lead to the extinction of local species.

2.Groundwater Contamination: If wastewater infiltrates originally safe groundwater sources, it will compromise the drinking water safety of nearby residents. Consuming such polluted water can cause harm to human health, and in extreme cases, result in fatalities.

3.Soil Degradation: When polluted wastewater enters the soil, it induces soil contamination, thereby disrupting the normal growth of plants and soil microorganisms.

4.Air Pollution: Wastewater with foul odors can contribute to air pollution.

5.Food Chain Accumulation: Wastewater may contain toxic and hazardous substances. These substances can accumulate in the bodies of animals through their diet; while they may not immediately harm the animals themselves, their transfer to humans via the food chain can cause severe health risks.