Views: 0 Author: Yimei Dane Publish Time: 2026-09-18 Origin: Site
This project is located at a palm oil mill in Malaysia. The plant operator needs to treat the mill’s wastewater to meet discharge standards. Palm oil wastewater requires a treatment process capable of handling high organic loads, fats and oils, acidic conditions, high temperatures, and variable wastewater characteristics. For this project, Yimei developed a one-stop wastewater treatment solution. The proposed treatment process combines oil-water separation, equalization, electrocoagulation, dissolved air flotation, anaerobic treatment, aerobic MBBR treatment, clarification, ozone treatment, and final water storage.
Hydraulic flow management is an important part of the system design. Therefore, based on the production capacity, we assessed the required treatment capacity at 50 m³/h, taking into consideration that wastewater from a palm oil mill may vary depending on production conditions, raw material processing, cleaning activities, and process water usage. A stable treatment system needs to receive wastewater in a controlled manner before biological treatment begins.
The process proposed by Yimei begins with front-end separation and flow equalization, followed by physical and chemical treatment. The wastewater is then treated through anaerobic and aerobic biological stages to address its high biodegradability and high organic load. The clarification stage separates suspended biological solids, while ozone treatment serves as a polishing step before the treated water enters the clean water tank.
The final destination is described as either discharge or reuse, depending on the confirmed effluent requirements and the customer’s water management objectives.
Parameter | Unit | Analytical method | Guide level | Florentine external result |
Total Nitrogen | mg/l | ISO 5663:1984 | ≤50 | 27.02 |
Total chromium | mg/l | ISO 15586:2003 | ≤0.5 | 0.153 |
BOD5 | mg/l | ISO 5815:2003 | ≤150 | 5000 |
COD | mg/l | ISO 15705:2002 | ≤500 | 8400 |
Total Fe / Iron | mg/l | ISO 15586:2003 | ≤5 | 0.20 |
Oils and fats | mg/l | ISO 11349:2010 | ≤30 | 3210 |
Total hydrocarbons | mg/l | EPA 1664 | ≤10 | 9.3 |
Suspended solids (MES) | mg/l | ISO 11923:1997 | ≤150 | 37546.00 |
pH | - | ISO 10523:2008 | 5.5–9.5 | 4.6 (at 22.2℃) |
The report indicates that the wastewater temperature is approximately 70–90°C, and the water appears dark and turbid. Such high-temperature wastewater requires careful management before entering the biological treatment stage, as biological treatment requires operating conditions suitable for the selected microorganisms and process configuration. The COD concentration ranges from 5,000–50,000 mg/L, while the BOD concentration ranges from 3,000–27,000 mg/L. These values indicate a high organic load, and the wastewater characteristics may also fluctuate considerably. In addition, the wastewater contains 1,000–5,000 mg/L of fats and oils. If they are not removed during the front-end stage, they may interfere with downstream separation and biological treatment processes.
These characteristics make it important to coordinate temperature control, pH management, oil removal, solids separation, and biological treatment, rather than relying on a single treatment unit.
The complete industrial wastewater treatment system sequentially passes through each treatment unit to achieve oil-water separation, physicochemical pretreatment, biochemical degradation, and advanced treatment. The treated effluent can meet discharge standards or be reused.
Treatment Process:
Oil Separation → Equalization Tank → EC Tank → DAF Tank → Anaerobic Tank → MBBR Aerobic Tank → Settling Tank → Ozone Tank → Clear Water Tank → Discharge or Reuse
Choosing a one-stop wastewater treatment solution eliminates the need to coordinate with multiple suppliers. With its comprehensive end-to-end wastewater treatment capabilities, Yimei coordinates process design, treatment unit equipment selection, system integration, and treated water reuse planning to meet the requirements of industrial wastewater from different industries.
The one-stop approach simplifies project communication and implementation. It also ensures a high level of compatibility between the process logic of each treatment unit, helping to avoid issues such as poor compatibility and unstable operation caused by combining equipment supplied by different vendors. From front-end oil-water separation and physicochemical pretreatment, through mid-stage anaerobic and MBBR biological treatment, to back-end advanced treatment and treated water management, the entire system operates as an integrated and coordinated solution.
This approach balances treatment performance, land requirements, and ease of operation and maintenance, while meeting the dual requirements of compliant discharge and wastewater reuse.
Malaysia has a well-developed industrial sector, and wastewater treatment is widely required across industries such as palm oil processing, food and beverage, rubber glove manufacturing, electronics manufacturing, chemicals, and textiles. It also covers municipal wastewater treatment applications in urban areas.
Palm Oil Processing Industry: As one of the world’s major palm oil producing regions, Malaysia’s palm oil wastewater is characterized by high oil and fat content, high organic concentrations, and an extremely high pollution load.
Food and Beverage Industry: Wastewater from this industry is characterized by significant fluctuations in water volume, a high concentration of organic impurities, and substantial variations in water quality depending on production conditions.
Rubber Glove Industry: This type of wastewater contains high levels of colloidal impurities, suspended solids, and color pollutants, making it difficult for conventional treatment processes to achieve complete purification.
Electronics Manufacturing Industry: Electronics manufacturing processes generate industrial wastewater containing trace heavy metals and emulsified pollutants. The water quality is complex, and the treatment requirements are stringent.
Chemical Industry: Chemical wastewater contains various types of pollutants, high COD concentrations, and poor biodegradability. It may also be discharged intermittently.
Textile Industry: Textile and dyeing wastewater is characterized by high color intensity, significant residual pollutants, and noticeable odors. It is one of the key types of industrial wastewater subject to strict control in Malaysia.
Yimei provides end-to-end wastewater treatment processes to address industrial wastewater treatment challenges with precision, ensure clean and stable treated effluent, and meet the high environmental protection standards required across different industries.
The solution we provide is well aligned with the project requirements. The entire project progressed efficiently and smoothly from the outset. Our experienced professional technical team provided support throughout the project, and the customer was highly satisfied with the final results. We respond promptly to requirements at every stage of the project to ensure the stable commissioning and operation of the complete wastewater treatment system.
If you have a wastewater treatment project, please feel free to contact us at any time. Our professional technical team will get in touch with you within 24 hours.
