With the rapid development of the modern health industry, the health industrial park has become a comprehensive industrial cluster, covering many fields such as health care, health management, health tourism and health pharmaceuticals. These parks focus not only on the quality of products and services, but also on the environmental impact of the production process, especially the treatment of wastewater.
There are two main sources of wastewater in the health industrial park:
1. Wastewater generated in production processes, such as those from pharmaceutical companies, often contains high concentrations of organics, suspended solids, and colors.
2. Sewage from daily life, including domestic water and possible chemical residues.
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The wastewater treatment process typically consists of three stages:
Pretreatment: The purpose is to remove most of the organic matter and suspended solids in the wastewater, and physicochemical treatment methods are often used, such as coagulation and air flotation. The coagulation method condenses fine pollutants into larger particles by adding chemicals, which facilitates the subsequent solid-liquid separation.
Biochemical treatment: This stage mainly removes organic matter from water through anaerobic and aerobic biological treatment technologies. Anaerobic biological treatment uses microorganisms to break down organic matter into methane and carbon dioxide under anaerobic conditions, while aerobic treatment further breaks down organic matter under aerobic conditions.
Specific applications of the processing technology include:
Coagulation: It is widely used in pretreatment and advanced treatment, and the suspended solids are coagulated and easily separated by chemical agents.
Anaerobic biological treatment: It is suitable for the treatment of high-concentration organic wastewater, and uses anaerobic bacteria to convert macromolecular organic pollutants into small molecules.
Aerobic biological treatment: further purification of wastewater to remove residual organic matter and ammonia nitrogen contaminants, including activated sludge and biofilm methods.
Hydrolysis and acidification method: suitable for the treatment of low-concentration wastewater, control the biological treatment process in the hydrolysis and acidification stage, although the COD removal rate is relatively low, but the adaptability to water quality is strong.
Multi-stage contact oxidation method: It is applied in some health industrial parks to stably remove organic matter and ammonia nitrogen from wastewater.
Advanced treatment: When wastewater needs to meet higher discharge standards or be reused, technologies such as coagulation and sedimentation, ultrafiltration, reverse osmosis and other technologies will be used for further treatment.
Key points of wastewater treatment:
1. Select the appropriate treatment process according to the water quantity and water quality characteristics of the wastewater.
2. Pretreatment removes most of the suspended solids and some organic matter through physicochemical methods, laying the foundation for subsequent biochemical treatment.
3. Biochemical treatment uses the biochemical action of microorganisms to further decompose organic matter to achieve deep removal of pollutants.
4. Advanced treatment to ensure that the wastewater meets the discharge standard, or to reuse the wastewater, such as through RO reverse osmosis technology.
The treatment of wastewater in the health industrial park highlights the importance of the combination of environmental protection and industry. Through scientific and reasonable process selection and application, wastewater treatment can not only meet the requirements of environmental protection, but also improve the recycling rate of resources and promote the sustainable development of healthy industrial parks.