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FIELDS

  Environmental Protection
   
 

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:
 

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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 projects:

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:

Items

CODcrmg/l

BOD5
mg/L

SS
mg/L

NH3-Nmg/L

TN
mg/L

Inlet Water

300

150

190

25

35

Outlet Water

70

20

20

15

20

 

Treatment process: Pre-treatment + Denitrogenation process. Sludge wasremoved 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.

 

 


 

Project name: Heat supply & water treatment plant of 300kt/a synthetic ammonia, 150kt/a dimethyl ether project of Guizhou Tianfu Chemical Co., Ltd.

Project site:Fuquan,Guizhou

Project capacity: water treatment plant2200m3/h, decontamination station and demineralized water plant: 2100m3/h, wastewater  treatment and reclamation plant in the plant area: 120m3/h, circulation water service installation50000m3/h, heating engineering , etc. Buildings: reinforced concrete frame or bent structure; structures: reinforced concrete structures; EPC (engineering, construction, debugging) general contract

Start time: April, 2007  

Completion time:January,2010  

 

Project  name

Wastewater treatment and reclamation plant of Fengshan Chemical co., ltd. of Shandong Yanzhou Coal Mining Company Limited

Index of influent water (mg/L)

B/C≥0.35

CODcr≤160

Index of effluent water.

(mg/L)

BOD5≤5

CODcr≤30

SS≤120

NH3-N≤150

SS≤10

NH3-N≤3

Cl-≤200

PH=69

Cl-≤200

PH=69

Area covered by the project

29000m2

Project size

12000t/d

Process flow

Bar screen + homogenization tank + A tank + o tank + A tank + o tank + final settling tank and pumping station + biological aerated filter + admixture reaction basin + ozone contact chamber + powdered activated carbon plant + disinfection tank and pumping station

Process description

Ozone powdered activated carbon plant L×B = 40×22m, contact time of ozone oxidation and powdered activated carbon is 30 Min, 2 series of A/O tanks L×B = 92 ×48m
Sludge pump station L×B×H = 8 ×5×5m
Biological aerated filter L×B×H = 40 ×13×6 m
Coagulation tank and filter chamber L×B = 30 ×13m

 

Project name

5,000 tons propylene oxide wastewater expansion project of Dongda Chemical of Shangdong Bluestar

Index of influent water(mg/L)

CODCr≤2394

T≤ 85℃

Index of effluent water

(mg/L)

BOD5≤300

CODCr≤500

CODcr/BOD5≥0.35

SS≤400

PH=6-9

CaCl2≤25g/l

 

 

Area covered by the project

89733m2

Project size

10800m3/d

Process flow

No.1 preliminary sedimentation tank + homogenization tank + cooling tower + No.2 preliminary sedimentation tank + distribution box + aeration tank + Biochemical tank + final settling tank + sedimentation tank + blower house + water discharge pump house + sludge dewatering

Process description

Cooling tower: glass fibre reinforced plastic, 2 sets
Aeration tank: the existing aeration sedimentation tank is utilized, 16 h, microporous aerator 1105 sets, ventilatory capacity 5.71 m3/h per set<0}.
Biochemical tank: the existing contact oxidation tank is utilized, getting through 2 cells, plug-flow type, 18.3 ×7×5 .1,  15.9h 
Microporous aerator: 565 sets, ventilatory capacity is 5.7 m3/h· per set.
Sludge thickening dewatering room: frame construction, overground type, 42 ×18m
Sludge thickening dewatering integrated machine, effective width of filter belt 2m, water content of cake ≤ 80 %
Frame filter: 1 set, gross capacity of filter cell: 2.2m3, water content of cake: 65 %.

 

Project name

Phase 1 project of wastewater treatment plant of Anhui Dongzhi Xiang Yu Chemical Industry Park

Index of influent water(mg/L)

BOD5=320

CODcr≤800

{Index of effluent water

(mg/L)

BOD5≤20

CODcr≤100

SS≤300

Chroma ≤ 100 times

SS≤70

Chroma ≤ 50 times

PH=59

TKN≤60

PH=69

NH3-N≤15

Area covered by the project

21000m2

Project size  

5000t/d

Process flow

Collecting basin and bar screed, homogenization tank preliminary sedimentation tank flotation tank oxidation pond buffer pool hydrolyzation tank A/O tank  final settling tank biological aerated filter middle lift pump station filter
active carbon

Process description

Oxidation buffer pool: 1 set L×B×H=8.0×6.0×6.0m
Hydrolization biochemical tank: Hydrolization tank 1 set L×B×H=33.0×10.0×6.0m
A/O biochemical tank 1 set(in 2 series)
Biological aerated filter 1 set (in 3 cells)  L×B
5m×5m

 

 

   
 

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