Beyond Compliance: Sanyuan Environment Empowers Purification Plants with Green and Sustainable Development Through Noise Control

Noise pollution has become a hidden obstacle to the sustainable development of wastewater treatment plants. Research by the World Health Organization shows that long-term exposure to noise levels above 85 dB can lead to occupational hearing loss; one wastewater treatment plant worker was diagnosed with moderate noise-induced hearing loss after working for 21 years in a blower room with noise levels of 92.6 dB. As a national high-tech enterprise, Sanyuan Environment has been deeply involved in noise pollution control for nearly 20 years, providing wastewater treatment plants with a complete solution using its "Four-Dimensional Noise Reduction Technology System."

Core hazard data

• Occupational hearing loss: 16% of hearing loss in adults worldwide is due to workplace noise exposure.

• Typical Case: A 21-year employee developed moderate occupational noise-induced hearing loss due to a 92.6 dB noise environment.

• Compliance risk: Noise levels at some cleanrooms exceed the limits specified in GB 12348-2008 standard.

Noise Source Analysis: Main Noise Types and Characteristics of Cleanrooms

Equipment noise: spectral characteristics of the core noise source

The noise in the cleanroom mainly originates from the power equipment. The operating noise of the Roots blower can reach 92.6 dB, and the water flow impact noise in the inlet pump room is about 75.3 dB. Different equipment exhibits unique spectral characteristics: blowers mainly produce mid-to-high frequency noise, pumps contain a large amount of low-frequency vibration, while air compressors exhibit broadband noise.

Auxiliary noise sources: the combined effect of airflow and water flow noise

When the air velocity in the ducts of a cleanroom air conditioning system is too high, it generates additional airflow noise, which adds to the noise level of the equipment. Actual measurements show that untreated ventilation ducts can increase the overall noise level by 5-8 dB, becoming a hidden factor contributing to excessive noise levels.

Legal and regulatory requirements: the minimum compliance standards for noise control in cleanrooms

National Mandatory Standard: Noise Limits at Factory Boundaries and Cleanrooms

GB 12348-2008 clearly stipulates that the noise limit at the boundary of a cleanroom in Class 3 areas should be 65 dB during the day and 55 dB at night; GB 50073-2013 requires that the noise level in a cleanroom during non-unidirectional flow be ≤60 dB and during unidirectional flow be ≤65 dB. A natural gas purification plant was ordered to suspend production for rectification by the environmental protection department because the noise level at its boundary exceeded the standard by 23 dB.

Industry management requirements: Discharge permits and the "three simultaneous" system

The Ministry of Ecology and Environment requires full coverage of industrial noise emission permits by 2025, and enterprises must implement noise control measures simultaneously during the project design phase. Sanyuan Environment's "full-process compliance service" ensures that projects meet standards throughout the entire process from environmental impact assessment to acceptance.

Treatment method: Sanyuan Environment's "Four-Dimensional Noise Reduction Technology System"

Noise source control: reducing noise energy at the source

Employing a patented matrix silencer, it achieves broadband noise reduction through a honeycomb-shaped small-channel structure. In a case study of exhaust fan management at a satellite station, noise levels were reduced from 96dB to 55dB, meeting the Class 1 standard of GB 3096-2008. The accompanying intelligent vibration-damping base can reduce equipment vibration transmission rate by over 80%.

Propagation path blocking: Constructing a stereo acoustic barrier

Make good use of a composite solution of "sound absorption + sound insulation + noise reduction + vibration reduction": turbine soundproof enclosure (insertion loss 35dB) + cooling tower noise reduction guide plate (noise reduction 22dB) + plant boundary folded plate sound barrier (6m high). After application in a thermal power plant, the plant boundary noise was reduced from 68dB to 48dB, meeting the Class 2 area standard.

Receiver Protection: Innovative Application of Ventilated and Soundproof Windows

Custom-designed ventilated and soundproof windows are used in sensitive areas such as control rooms and duty rooms.

• Acoustic performance: 92% noise blocking efficiency in the mid-to-high frequency range, and 60% improvement in low-frequency vibration transmission loss.

• Ventilation design: Labyrinthine sound-absorbing channel, air exchange rate of 60-120 m³/h with windows closed.

• Project Case: After the renovation of the duty room of a purification plant in Chengdu, the noise level dropped from 72dB to 42dB, while achieving a PM2.5 filtration efficiency of 99%.

Conclusion: Protecting the Green Sound Environment through Technological Innovation

Sanyuan Environment provides noise control solutions for numerous purification plants nationwide through its full-chain service encompassing "consulting-design-production-construction," achieving an average noise reduction of 35dB and a 100% project acceptance rate. With the deepening implementation of the "Noise Pollution Prevention and Control Law," choosing professional noise reduction solutions is not only a compliance requirement but also a strategic investment for sustainable corporate development.

Technology empowers green development : Sanyuan Environment is a national high-tech enterprise with over 100 patents. It can provide customized noise control solutions for purification plants, enabling production and the environment to coexist harmoniously.