What are the technologies available for removing oil from phenol-amine wastewater? How is it performing in practice?
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Dear experts, what are the techniques available for removing oil from phenol-ammonia wastewater? How is it performing in practice? Can the oil content in the treated effluent be reduced to below 200 ppm? Is it necessary to add chemicals during the treatment process? Is reverse washing and regeneration required?
Oil removal from phenol-amine wastewater mainly relies on physical and chemical methods. Common techniques include air flotation, flocculation sedimentation, filtration, membrane separation technology, etc. In actual operation, the effectiveness of these technologies varies depending on specific circumstances; however, they generally can effectively reduce oil content. 1. Air flotation method: By introducing air, oil droplets attach to bubbles and rise to the surface, thereby removing the oil. Generally, a flocculant needs to be added to improve treatment efficiency. 2. Flocculation sedimentation method: An agglomerant is added to cause oil droplets to aggregate into larger particles, which are then separated from the water through sedimentation. 3. Filtration method: Use sand filtration or activated carbon filter media to physically trap and adsorb oil contaminants. 4. Membrane separation technology: Uses membrane materials with specific pore sizes to separate oil and water under pressure. With these methods, the oil content in the treated effluent can generally be reduced to below 200 ppm; the exact value depends on the quality of the raw water and the degree of optimization of the treatment process. During the treatment process, chemicals such as pH regulators and flocculants may need to be added to enhance the effectiveness of the treatment. Some techniques, such as filtration, may require backwashing and regeneration to maintain filtering efficiency. .
Phenol-amine wastewater is generally generated during coking or coal oxidation processes. Such water usually contains a certain proportion of tar; after removing the free tar, oil removal can be achieved using PolyCera membranes. The oil content can be reduced to below 10 ppm, without any loss of ammonia and phenol in the wastewater. Additionally, other suspended solids present in the process wastewater are also removed. If there is interest, a preliminary qualitative test can be conducted on users to see the effects first.
Is the “PolyCera membrane” you mentioned based on the coalescence principle? What about the effect on dissolved oil or oil-in-dust? Also, how is free tar removed? Thank you
This post was last edited by qqgd on 2024-7-15 at 20:20. Jucci is a brand of membrane products. Utilizing ultrafiltration or nanofiltration, these membranes can effectively remove dissolved oils and emulsified oils from water. These same membranes were used to treat oil-contaminated seawater during the BP oil spill in the Gulf of Mexico over 10 years ago. Freeful tar can be removed by using a strongly alkaline cleaning solution at a certain temperature. Please refer to the content at this link: The official website of Polycera (Shanghai) Technology Co., Ltd. (polycera.com)
Thank you very much; I’ll first study the materials*.
The coalescer can ensure that the oil content in the effluent is 2% by weight; it requires low power consumption for its stationary components. The use of chemicals depends on the specific process and the composition of the wastewater. Backwashing is not necessary, but the feed temperature must be kept below 20 degrees Celsius.
Thank you. Additionally, there are several questions regarding coalescence: How many stages of oil removal should be used for treating light and heavy oils? Can the dust-oil mixture system handle it? How long is the operating cycle? Why is the feed temperature so low?
For the preliminary oil removal of phenol-ammonia wastewater, physical oil removal methods are employed, along with three-stage oil removal using coagulators; this approach has proven very effective and has been in use for 2 years
As long as there is a density difference, a coalescing filter element can be used; the number of stages required can only be determined based on the specific project requirements. It usually consists of pre-treatment and a primary coalescing filter element; note that it is not a coalescing separation tower. The dust-oil mixing system requires pre-filtering treatment, depending also on the solid content. The operational cycle is generally 2-3 years. I don’t visit forums often, but you can add me on V to discuss.