Sewage treatment constitutes a fundamental commitment to water quality security. This paper aims to clarify the multifaceted benefits of sewage treatment practices.

Taking rice paddy irrigation as a case study, ensuring the safety of water discharged into paddies requires sewage treatment systems to conduct 24-hour real-time monitoring of purified water sources via water quality detectors. Additionally, relevant personnel perform irregular on-site inspections to guarantee the stable operation of treatment processes. For any non-compliant water quality indicators, targeted pollutant treatment is implemented prior to re-testing—this iterative process ensures that all effluent meets safety standards.

The coexistence of rice and frogs in paddies exemplifies ecological synergy: in high-efficiency rice-frog ecological pools, frogs’ innate pest-catching behavior is leveraged to control paddy pests, eliminating the need for pesticide applications. This reduces the risk of paddy water contamination and naturally enhances rice quality. Notably, the quality of irrigation water is critical to paddy growth, and effective sewage treatment significantly supports healthy crop development.

Beyond agricultural applications, sewage treatment is equally vital for other water uses. Contaminated domestic water, if consumed without treatment, poses direct risks to human health. Untreated industrial water or wastewater may impair production efficiency; moreover, direct discharge of untreated wastewater causes river basin pollution, with severe consequences for both the ecological environment and public health.