Endeavors at environmental protection are reflected in all the projects designed and/or implemented by ECEC in strict compliances with the latest national policy. Effective measures and up-to-date applicable technologies are carefully taken and selected by ECEC for the treatment of gaseous effluents, waste water and solid wastes which are unavoidably concomitant in most industrial plants.

ECEC has set foot in environmental protection area since 1960s. In 1963, China National Chemical Water Supply & Sewerage Design and Technology Center and Water Supply and Drainage Committee of Civil Engineering Association are all affiliated with ECEC. In 1977, ECEC's own Water Treatment Research Institute was established. In 1988, Hefei Industrial Water Treatment Engineering Company of China National Chemical Engineering Corporation was established, and developed to the Environmental Protection Branch of ECEC at the end of 1996 with a team of expertise from a diverse disciplines such as chemical engineering, environment engineering, water supply & sewerage engineering, microbiology, biochemical, environment monitoring, etc. With more than 60 specialists and engineers directly dealing with the area, ECEC can provide a wide range of services in the field of environmental protection including testing & research, preliminary study, engineering, equipment supply, technical service and turnkey project contracting services. During the past decades, ECEC has accomplished more than 100 testing & research tasks and 60 major environmental protection projects covering industrial waste water treatment, municipal waste water treatment, air pollution control, rubbish treatment and circulation water, etc. At the field of complex and large-scale industrial waste water treatment, ECEC firmly takes a leading position in all over China.

ECEC always attaches great importance to the development of environmental technology, and solved a lot of difficult problems first time in the country including high salt-containing waste water treatment, calcium-containing waste water treatment, PTA waste water treatment, vinyl cyanide waste water treatment and nitrilon waste water treatment. ECEC has also developed an aerobic treatment process and A/O treatment process for high organic-containing waste water. Furthermore, ECEC owns several patents and proprietary technologies in the field of waste water treatment.

ECEC also spares no efforts in the area of urban pollution control. ECEC actively involves itself in the comprehensive pollution control for some famous Chinese rivers and lakes such as Yangtze River, Huaihe River, Tai Lake, Chao Lake, and Dianchi Lake. A 100,000m³/d municipal waste water treatment plant initiated and implemented by ECEC, has been set as a model plant by State Environmental Protection Administration of China and introduced to other Chinese cities. Besides, ECEC pays close attention to the international trend of new processes and new materials for pollution control, and actively applies these up-to-date technologies in the control of acid rain, municipal waste water and rubbish in an effort to make our best contribution to China’s “Clean Water and Blue Sky ” project.

Typical environmental protection projects of ECEC include:
• Pingdingshan Municipal Wastewater Treatment Plant, 150000m³/d
• Qilu Petrochemical Corporation, 300,000t/a Ethylene Plant WWT Station, 28800m³/d
• Yangzi Petrochemical Corporation, 300,000t/a Ethylene Plant WWTP, 38400m³/d
• Yangzi Petrochemical Corporation, A/O WWTP for PTA Plant, 12000m³/d
• Anqing Petrochemical Complex, WWT Station for Nitrilon Plant, 16800m³/d
• Anqing Petrochemical Complex, Oil Refinery Plant WWT Station, 14400m³/d
• Taiyuan Hexi Chemical Zone, Nanyan WWT Plant, 60000m³/d
• Shanghai Titanium Dioxide Plant, WWT Station, 3900m³/d
• Taiyuan Iron & Steel Company, Zhaozhuan WWT station, 110500m³/d
• Guizhou Chemical Fertilizer Plant, WWT Station, 2400m³/d
• Yugang Titanium Dioxide Plant, WWT Station, 9600m³/d
• Tongling DAP Plant, WWT Station, 7200m³/d
• Xinjiang Ethylene, Waste Slag Treatment, 2430t/a
• 264,000Nm³/d Tail-Gas Sulphur Recovery Plant, Huainan Chemical Complex
• 270,000Nm³/d Sour Gas Treatment Plant, changqin Petrochemical company

Sample project: Pingdingshan Municipal Wastewater Treatment Plant
Plant capacity: 150000m³/d
Area served: 41 km²
Population served: 440,000
Land occupation: 117,000m²
Job opportunities: 183
Water quality:

Treatment process: Pre-treatment + Denitrogenation process. Sludge was removed by mechanical concentration & dehydration process.
Features of the process: Oxidation ditch process with pre-positive anaerobic tank and brush aerators is used, and key part of the process is circle oxidation ditch with six channels. When mixed flow passes through the oxidation ditch, the flow goes through aerobic section and anaerobic section separately by means of arrangement of brush aerator in the channel, and eventually, clean water was obtained.