CASE
A fine chemical wastewater treatment project in Lianyungang, Jiangsu
A fine chemical wastewater treatment project in Lianyungang, Jiangsu
A fine chemical wastewater treatment project in Lianyungang, Jiangsu
A fine chemical wastewater treatment project in Lianyungang, Jiangsu

A fine chemical wastewater treatment project in Lianyungang, Jiangsu

Jiangsu Lianyungang Fine Chemical Co., Ltd. is located in the Jiangsu Lianyungang Chemical Industry Park. The company was founded in 2010, and the main source of wastewater is production wastewater and other wastewater, with a total wastewater volume of 700t/d. Production wastewater is 430t/d, and the remaining wastewater mainly consists of exhaust gas spray water, circulating cooling water, ground equipment flushing water, initial rainwater, domestic sewage, soft water concentrated water drainage, etc. The system design adopts the principle of "concentrated water separation and comprehensive treatment", while fully considering the removal of characteristic pollutants such as chlorobenzenes and DMF.

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案例详情

1、 Project Overview
Jiangsu Lianyungang Fine Chemical Co., Ltd. is located in the Jiangsu Lianyungang Chemical Industry Park. The company was founded in 2010, and the main source of wastewater is production wastewater and other wastewater, with a total wastewater volume of 700t/d. Production wastewater is 430t/d, and the remaining wastewater mainly consists of exhaust gas spray water, circulating cooling water, ground equipment flushing water, initial rainwater, domestic sewage, soft water concentrated water drainage, etc. The system design adopts the principle of "concentrated water separation and comprehensive treatment", while fully considering the removal of characteristic pollutants such as chlorobenzenes and DMF. Improve system processing efficiency and reduce comprehensive processing costs.
Refractory COD: The COD in wastewater fluctuates greatly, with an instantaneous concentration exceeding 130000mg/L and an average concentration of about 8700mg/L. It also contains difficult to biodegrade components such as chloroalkanes and benzenes, as well as a large amount of long chain chemical substances and a mixture with stable bond energy. Conventional treatment methods are difficult to meet the discharge requirements.
2、 Design process
The system follows the principle of separating clean water and sewage, and separating and treating pollution. Add a high concentration collection tank to collect ultra-high concentration wastewater and mix it with medium to low concentration wastewater before entering subsequent treatment facilities. The main treatment process is iron carbon micro electrolysis+new Fenton oxidation tower+IC anaerobic+aerobic process, and a coagulation+ozone oxidation process is added at the end of the process to ensure stable and standard effluent, laying the foundation for later wastewater standard improvement and transformation.
Fluoride: The fluoride content in the wastewater is about 40mg/L, which is removed by the physicochemical process in the system. Reagents are added to the Fenton section and the end coagulation sedimentation process section for removal. Reducing the adverse effects of fluoride concentration on anaerobic systems.
DMF: In wastewater, DMF is about 25mg/L and dimethylamine is about 35mg/L, which have poor biochemical performance and are difficult to remove through physical and chemical methods. The system hydrolyzes some DMF by adjusting the alkali content, and domesticates and cultivates special microorganisms in the biochemical section to effectively degrade DMF in wastewater. The nutrient sources in wastewater are not coordinated and cannot meet the metabolism of microorganisms. Therefore, appropriate nutrients are added to the process to maintain microbial growth.
Total phosphorus: The phosphorus content in wastewater is about 120mg/L, mainly organic phosphorus. The system converts inorganic phosphorus through oxidation, and adopts a combined process of biological phosphorus removal and physicochemical precipitation to ensure the removal of total phosphorus.