Vietnam Aquaculture Wastewater Treatment Case: Color Removal, Sludge Separation and Odor Control
Project Background
Vietnam has a strong aquaculture industry, especially in shrimp farming, fish farming and seafood processing. During aquaculture operations, wastewater may contain suspended solids, organic matter, residual feed, feces, ammonia nitrogen, phosphorus and odor-causing substances.
In this Vietnam aquaculture wastewater treatment project, the customer needed a practical solution to improve wastewater clarity, reduce visible color, support sludge-water separation and control odor around the treatment system.
Bluwat Chemicals recommended a combined chemical solution using BWD decoloring agent, Polyacrylamide Pam and plant-based deodorizer.
Wastewater Challenges
The wastewater from aquaculture farming had several common problems:
Because the wastewater composition changed according to feeding volume, water exchange frequency and biological treatment condition, the treatment process needed flexible chemical support.
Products Used
BWD Decoloring Agent
Bluwat BWD decoloring agent was used to improve wastewater color and clarity. It can help reduce yellowish or dark color in wastewater and support the following coagulation and flocculation process.
Polyacrylamide PAM
Polyacrylamide was used as a flocculant to improve sludge-water separation. After coagulation, PAM helped small particles form larger flocs, making sedimentation or physical separation easier.
Plant-Based Deodorizer
Bluwat plant-based Deodorizer was used for odor control in wastewater collection areas, biological treatment tanks and sludge treatment sections. It helped reduce unpleasant odors caused by organic decomposition, ammonia and hydrogen sulfide.
Treatment Process
Pretreatment
The aquaculture wastewater was first collected into the pretreatment system. Large solids, feces and residual feed particles were separated before entering the biological treatment section. Pretreatment helped reduce the organic load and protected the downstream treatment system.
Biological Treatment
The wastewater then entered the biological treatment unit. In aquaculture wastewater treatment, common biological processes include contact oxidation tanks, MBBR biological reactors and SBR biological reactors.
Microorganisms helped break down organic pollutants and reduce ammonia nitrogen. However, biological treatment may generate odor, especially when the wastewater contains high organic matter or when aeration is unstable. Bluwat plant-based Deodorizer was applied around odor-generating areas to improve the operating environment.
Physical Treatment
After biological treatment, the wastewater passed through physical treatment such as sedimentation, filtration or membrane separation. This step helped remove remaining suspended solids and microbial flocs. Physical treatment improved water clarity and prepared the wastewater for chemical polishing.
Chemical Treatment
Chemical treatment was used to further improve the water appearance and remove remaining fine particles. BWD decoloring agent was added to reduce visible color. PAC could be used together with BWD to improve coagulation performance. PAM was then added to form larger and stronger flocs. This combined process helped improve settling performance and made the treated water clearer.
Deep Treatment
After chemical treatment, the water could be further treated by filtration, UV disinfection or other advanced treatment processes according to reuse or discharge requirements. This stage helped remove remaining fine suspended solids and microorganisms.
Application Result
After using Bluwat’s combined solution, the wastewater treatment system showed better clarification performance. Suspended solids were easier to separate, and the treated water became visibly cleaner.
The plant-based Deodorizer also helped reduce odor around the biological treatment area, wastewater tanks and sludge handling section. This improved the working environment for operators.
Why This Solution Worked
Aquaculture wastewater usually contains a complex mixture of organic pollutants, suspended solids, ammonia and odor sources. A single product is often not enough to solve all problems. Bluwat provided a combined solution:
This solution is suitable for shrimp farms, fish farms, aquaculture wastewater treatment stations and seafood-related wastewater treatment projects.
Conclusion
This Vietnam aquaculture wastewater treatment case shows how BWD decoloring agent, PAM and plant-based Deodorizer can work together to improve wastewater clarity, sludge separation and odor control.
For aquaculture wastewater with color, suspended solids and odor problems, Bluwat Chemicals can provide laboratory testing, product selection and technical support to help customers build a more stable treatment process.