Manufacturing, metal processing and food processing operations generate large volumes of oily wastewater. Oil can form stable emulsions with water. Many factories find that simple oil skimming cannot remove emulsified oil, leading to high COD and poor effluent quality. An oily wastewater demulsifier supports efficient emulsion breaking and reliable oil water separation as part of routine industrial oily wastewater treatment.
Surfactants and fine solid particles wrap oil droplets and prevent them from merging. The stable oil-water emulsion resists gravity separation. Skimmers only remove floating oil and have little effect on tiny emulsified oil droplets. This is why basic separation equipment often cannot achieve stable results without an oily wastewater demulsifier.
Oil skimming works well for free floating oil but has no effect on emulsified oil. Air flotation delivers decent results for some emulsions, though auxiliary chemicals are required. Membrane separation achieves high oil removal rates, yet membranes are easily fouled and expensive to maintain. All these technologies perform better when paired with proper emulsion breaking chemicals.
Shanmei Environment’s oily wastewater demulsifier breaks stable oil-water emulsions. It destabilizes oil droplets so they coalesce into larger oil layers for separation. It can be matched with air flotation or sedimentation tanks and cooperate with PAC/PAM for better solid-liquid separation.
It efficiently breaks emulsified oil and reduces COD in effluent. The product works under normal site conditions with no need for new equipment. Operators can adjust dosage flexibly based on emulsion strength.
It is suitable for metal cutting wastewater, rolling mill wastewater, food processing oily wastewater, cleaning wastewater from machinery workshops.
Conduct jar tests with raw oily wastewater samples to determine dosage and mixing time. Add oily wastewater demulsifier under rapid mixing, then slow mixing for oil droplet coalescence. Separate oil layer and test water quality to adjust dosing.
A machinery workshop had stable oil emulsion in cleaning wastewater. Skimming alone could not reduce effluent COD. After jar tests, the oily wastewater demulsifier was dosed on-site. Oil droplets aggregated and floated upward, improving oil-water separation and lowering COD.
Can the oily wastewater demulsifier treat all oil types? Performance depends on emulsion type and surfactant content. Jar tests are necessary. Can it be used together with flocculants? Yes, it can be combined with PAC and PAM for better separation.
Free oil can be removed by skimming, but emulsified oil requires an oily wastewater demulsifier to break the emulsion. Proper demulsification helps factories reduce COD and maintain stable wastewater treatment. Contact Shanmei Environment to test your oily wastewater sample and design a dosing strategy. Email: info@san-mei.com
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