Solutions for Solid Waste and Sludge Disposal Costs in Dairy Manufacturing Plant Wastewater for Food Production
Nakajima Bussan Co., Ltd. | OMB Wastewater Treatment System
Achieved approximately 98.6% reduction in BOD at a dairy factory. Supported oil and odor countermeasures with ozone, MNB, and special carriers.
The wastewater from cheese and dairy product factories contains high levels of lactose, proteins, and milk fats, requiring a large amount of oxygen for the decomposition of organic matter. In addition to issues like oil adhesion, scum, and foul odors, the variability in wastewater volume, concentration, and pH during manufacturing and cleaning processes makes microbial treatment unstable, which is a challenge. The OMB wastewater treatment system combines ozone, MNB (micro-nano bubbles), and a special carrier containing activated carbon to support wastewater treatment from both oxidation and biological treatment perspectives. The MNB nozzle provides gas supply and agitation, allowing microorganisms retained in the special carrier to decompose organic matter. This aims to address oil and odor issues while stabilizing the treatment process. The direct structure of the nozzle is less prone to clogging and can be retrofitted to existing adjustment and aeration tanks. It aims to reduce maintenance burdens and minimize excess sludge. Data from a cheese manufacturing plant producing 300 tons per day shows a reduction of approximately 98.6% in BOD and over 94.8% in oil content compared to the raw water. **Application Scenarios:** - Wastewater treatment with high oil content - Factory wastewater requiring odor control - Cases aiming to reduce sludge disposal costs - Situations where existing equipment is utilized to enhance wastewater treatment capacity **Benefits of Implementation:** - Significant reduction in oil content - Decrease in sludge volume - Suppression of foul odors (putrid smells) - Stabilization of wastewater treatment
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basic information
■Basic composition: MNB nozzle, pump, ozone generator, special carrier containing activated carbon "Levapore." ■Treatment method: A combination of gas supply and agitation using fine bubbles, ozone oxidation, and biological treatment using the carrier. ■Nozzle: Designed with a straight-through structure to minimize clogging by solids and fibers. ■Installation: Retrofit to existing adjustment tanks and aeration tanks, compatible with underwater pumps, land pumps, and tank combination methods. ■Example of installation configuration for a cheese factory (300t/day): MNB30×2 units, 3.7kW land pumps×2 units, ozone generator 30g/h×2 units, special carrier 15m³. *The equipment configuration and operating conditions will be selected based on wastewater volume, water quality, and existing facilities.
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P3
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Applications/Examples of results
■Proposal Purpose: Wastewater generated from the manufacturing processes and equipment cleaning of cheese, milk, yogurt, butter, cream, etc. ■Implementation Record: Cheese manufacturing factory (300t/day). Before implementation, issues included foul odors from the flow adjustment tank and the occurrence of filamentous fungi in the sedimentation tank. ■Published Data (Raw Water → After Implementation): BOD reduced from 1700 to 24, SS reduced from 190 to 23, oil content (n-Hex) reduced from 49 to less than 2.5. ■Calculated Reduction Rates: BOD approximately 98.6%, SS approximately 87.9%, oil content over 94.8%. ■Consideration for Implementation: Confirm fluctuations in oil content, organic load, pH, and wastewater volume, and propose treatment enhancement utilizing existing equipment. *The values and reduction rates are based on measurement values from the attached materials. Effects may vary depending on wastewater conditions, equipment configuration, and operating conditions. 1) MNB Device MNB30 x 2 units 2) Submersible Pump 3.7kw x 2 units 3) Ozone Generator 30g/h x 2 units 4) Special Carrier 15㎥ 【Specific Construction Example】 BOD Before/After Implementation 1,700 ➤ 24 SS Before/After Implementation 190 ➤ 23 n-Hex Before/After Implementation 49 ➤ <2.5 *All three indicators significantly improved.
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Company information
Our company engages in a wide range of operations, from handling industrial products in general to factory process development. Additionally, as a specialized dealer of Daikin Industries products, we have established a system that focuses on after-sales support during repairs. Please feel free to contact us first.
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