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Shengda project case
Shengda project case
 
Shengda project case
Shengda project case
 
Shengda project case
Shengda project case
 
Shengda project case
Shengda project case
 
Shengda project case
Shengda project case
 
Shengda project case
Shengda project case
 
Shengda project case
Shengda project case
 
Shengda project case
Shengda project case
 
Shengda project case
Shengda project case
 

Yancheng Shengda Chemical Co., Ltd.

Yancheng Shengda Chemical Co., Ltd. (Yancheng Chemical Factory No.4), founded in 1970, is a chemical enterprise specializing in the production of fine chemical and pharmaceutical and pesticide intermediates. It is a national key organic bromine series production base, The main products are bromoethane, bromopropane, bromine butane, bromooctane, 2-bromopropane, bromobenzene, p-dibromobenzene, bromochlorobenzene and so on.

Yancheng Shengda Chemical Co., Ltd. original set of sewage treatment system, due to long-running aging, it is difficult to meet the existing production and development requirements, the company leadership to environmental protection work as the focus, in accordance with the requirements of the environmental protection department of a new sewage treatment system, I commissioned the company's sewage treatment station of the program design, construction and commissioning.

Engineering design scale is 150m / d, wastewater is characterized by high COD concentration, difficult to degrade, showing strong acidity, biodegradability is poor. The main water quality indexes of design in and out water are as follows:

index
COD/(mg/l)
PH
Aniline (mg/l)
Ammonia (mg/l)
Water quality
70000-80000
1
423.96
189.01
Water quality
≤500
6-9
≤1
≤50

Shengda chemical wastewater mainly comes from workshop production wastewater and domestic sewage. The content of bromine and benzene in waste water is very high. If completely biochemical treatment is adopted, the microorganism will be restrained seriously and can not reach the expected treatment effect. If together into the pretreatment, it will cause the processing cost is too high.

In order to solve this contradiction, two key measures are adopted in the design: First, the high concentration wastewater and the low concentration wastewater are separately treated, and the high concentration wastewater is mixed with the low concentration wastewater after micro-electrolysis + Fenton pretreatment, ; Second, the mixed wastewater into the anaerobic stay 15 days, the use of long-term anaerobic treatment of refractory organic matter. Followed by A / O process.

The specific treatment process is:
High Concentration Wastewater Collection Well - High Concentration Wastewater Regulating Tank - Microelectrolysis - Fenton Oxidation - Flocculation Precipitation - Low Concentration Wastewater Regulation Cell
Low Concentration Wastewater Collection Well - Low Concentration Wastewater Regulating Basin - Anaerobic - A / O - Secondary Settling Pond - Activated Carbon Filtration - Clear Water Pool - Discharge

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