Process information
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| Location | CN |
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| Use advice for data set | When utilizing Modified Ludzak-Ettinger (MLE) Life Cycle Inventory (LCI) results, LCA practitioners should consider the process operational settings such as sludge age, hydraulic retention time, and aeration rates. The inclusion of upstream impacts from energy consumption, chemical use, and infrastructure should be taken into account. For comparability, ensure system boundaries and functional units are clearly defined and consistent with what is being assessed. |
| Technical purpose of product or process | The Modified Ludzak-Ettinger (MLE) process is applied in wastewater treatment facilities to remove organic matter, nitrogen, and nutrients from sewage effectively. It is commonly implemented in municipal wastewater treatment plants to meet stringent effluent standards and achieve high levels of nitrogen removal. |
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| General comment on data set | The Modified Ludzak-Ettinger (MLE) process is a commonly used biological treatment technology in municipal wastewater treatment. This process is based on the traditional Ludzak-Ettinger process but enhances nitrogen and phosphorus removal efficiency by introducing a modified control strategy and recycling processes. Wastewater flows through a series of aerobic and anoxic biological reaction zones, where organic matter is decomposed and nutrients such as nitrogen and phosphorus are removed. During this process, microorganisms utilize organic matter and nitrogen in wastewater as energy and nitrogen sources, removing pollutants through growth and metabolism. The MLE process, while improving nitrogen and phosphorus removal efficiency, also features simple operation and stable operation, making it suitable for medium to large-scale wastewater treatment plants. |
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| Technology description including background system | The Modified Ludzak-Ettinger (MLE) process features the following technical characteristics:Recycling Process: The MLE process incorporates internal recycling, returning a portion of treated wastewater to the anoxic zone, enhancing nitrogen removal efficiency while reducing the demand for chemicals.Improved Control Strategy: Advanced control strategies are employed in the MLE process, adjusting aeration and recirculation rates based on influent water quality and flow parameters to optimize the biological reaction process and ensure stable treatment performance.Operating Conditions: Proper control of oxygen supply and mixing rates in the aerobic and anoxic zones is required in the MLE process to maintain suitable conditions for microbial growth. Additionally, regular monitoring and adjustment of parameters such as aeration rates and recirculation ratios are necessary to cope with variations in influent water quality and operational fluctuations.Related Upstream and Downstream Processes: Upstream processes for the MLE process include wastewater pretreatment and conditioning to ensure that influent water quality meets treatment requirements. Downstream processes include sedimentation, filtration, and others, aimed at separating and removing suspended solids and biomass flocs to produce treated water that meets discharge standards. |
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