Wastewater treatment system for seafood processing industry

As of early 2020, Vietnam is a country providing a large source of seafood in the world. It is estimated that the amount of Vietnamese seafood exported to the world market accounts for about 27%. Therefore, the growth rate of the seafood processing industry is increasing rapidly. However, along with that, wastewater from the seafood processing industry is also gradually negatively affecting the surrounding environment, which is a top concern. To solve the above problem, E&C Vietnam Environmental Technology Joint Stock Company would like to introduce to customers the wastewater treatment system for the seafood processing industry in the article below.

Harmful effects of wastewater from the seafood processing industry

Seafood processing process

The seafood processing process includes many stages, each stage will emit a different amount of wastewater. First, when seafood is brought up, it will be washed or frozen and then cleaned. In the first stage, workers will wash the ingredients, fat and blood from the seafood will be washed away at this stage. Next, the amount of cleaned seafood is moved to the preliminary processing and selection stage. Those that do not meet the standards are eliminated, the rest are put through a second cleaning and created into finished products. Finished products will be canned into frozen foods or iced to be sold fresh. Finally, all finished products are stored and transported

Wastewater composition of seafood processing industry

Wastewater from the seafood processing industry consists of many different components. From the first stage of washing raw materials, wastewater containing fat, blood from many different types of seafood, and accompanying impurities are removed. The preliminary processing stage introduces into wastewater a large amount of fins, fish scales, shells of crustaceans, intestines, and internal organs of all kinds. This is also considered the stage that contains the most waste into the water source. Characteristics of wastewater in the seafood processing industry include many insoluble solids, suspended solids, insoluble fats such as oil, animal fat, germs, and bacteria in the process of decomposing internal organs. organs

Impact of wastewater from seafood processing industry on the environment

The larger the seafood processing factory, the higher the amount of wastewater discharged into the environment. If this amount of wastewater is not treated properly, it will have extremely negative impacts on the surrounding external environment such as:

Air pollution: Waste that has not been treated for a long time will cause a foul smell in the air
Soil pollution: Wastewater seeps into the soil, causing bad bacteria to thrive, making the soil polluted and plants unable to grow.
Water pollution: Wastewater from the seafood processing industry contains many bacteria, flies, shells of crustaceans such as shrimp, crabs... internal organs of fish and seafood when put into the water source make the water polluted. The infection turns black, stinks, and affects aquatic organisms, algae, etc.

Wastewater treatment process in seafood processing industry

Depending on the source of raw materials as well as the scale of operations of the business, there are many different wastewater treatment models. However, wastewater treatment models all have nearly the same operating process. Below is the operating process of the wastewater treatment system for the seafood processing industry that our company provides:

1/ Mechanical processing stage

Before being put into the collection tank, wastewater will be basically filtered through trash screens. Large impurities will be retained. Then the wastewater is sent to the settling tank. Sand and heavy metal components will settle to the bottom of the tank, above is water that has had the components removed and is sent to the conditioning tank. The regulating tank is responsible for regulating the water flow through

2/ Biological treatment stage

3/ Anaerobic tank: Tank containing anaerobic organisms, responsible for separating organic compounds in water transferred from the conditioning tank into inorganic compounds

4/ Aerobic tank: Includes an anoxic tank (the remaining organic substances are separated into CO2, H2O) and an aerotank (including aerobic organisms responsible for separating inorganic compounds into smaller inorganic substances). )

5/ Sedimentation tank 2: After being treated in the aerotank, water will be pumped to sedimentation tank 2. Here, the amount of sludge in the wastewater will settle and be treated. The remaining water is transported to the next stage

6/ Physical and chemical treatment stage

At this stage, microscopic germs and bacteria are completely removed by different filter materials. The final water is completely removed of impurities, germs, and disease-causing bacteria and returned to the environment

Advantages of wastewater treatment systems in the seafood processing industry

The wastewater treatment system in the seafood processing industry has some advantages and disadvantages as follows:

The system's working performance is highly effective, bringing great value to users
Able to remove some heavy metals, nitrogen, phosphorus without having to pump chemicals into the wastewater treatment system
Eliminates fishy and foul odors remaining in wastewater
Destroy all bacteria in wastewater before being discharged into the environment
However, in order for the system to achieve the highest performance, the installation area must be large enough. Customers need to spend a lot of time to get used to and operate the processing system without problems or damage. in use

Address of installation of wastewater treatment system for seafood processing industry

With many years of experience, ECLIM VIETNAM ENVIRONMENT JOINT STOCK COMPANY is ready to help customers advise, evaluate, and guide system maintenance and repair. The company is always proud to be a genuine and reputable provider of industrial wastewater treatment systems in general and wastewater treatment for the seafood processing industry in particular throughout the northern and neighboring regions. With a team of highly skilled technicians, we ensure to bring to your business the highest standard and effective wastewater treatment system. For more information, please contact hotline 0941 113 286 for more details