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Key Data Set Information
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Location
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HLJ-CN
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Geographical representativeness description
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Ashihe River Watershed
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Name
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Municipal wastewater treatment ; Wastewater ; Anoxic/Oxic process
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Use advice for data set
| Users applying this data should consider the specific context of the wastewater treatment facility, including local regulations and environmental standards. The data set is relevant for the assessment of wastewater treatment processes and should be used in the context of regional water pollution control strategies. Attention should be given to the operational parameters of the Anoxic/Oxic process unit, such as hydraulic retention time and sludge age, as these affect the efficiency of nutrient removal. The inclusion or exclusion of upstream and downstream processes, energy consumption, and chemical use in the LCA would depend on the goal and scope of the study. |
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Technical purpose of product or process
| The Anoxic/Oxic process unit operation is utilized in the treatment of wastewater within the Ashihe River watershed. It is primarily used for reducing the concentration of nutrients such as nitrogen and phosphorus, which are common contaminants in water bodies. The process is applicable to municipal or industrial wastewater treatment facilities aiming at advanced nutrient removal to meet stringent discharge standards. |
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Classification
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Class name
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Hierarchy level
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| In municipal wastewater treatment, the activated sludge process is a commonly used technology. This process involves mixing wastewater containing pollutants with activated sludge and circulating them to degrade and transform organic matter and ammonia nitrogen pollutants into harmless substances through microbial action. In this process, wastewater is introduced into a reactor where it is mixed with activated sludge and exposed to oxygen supply, stimulating the growth and metabolism of microorganisms. Microorganisms utilize organic matter as a carbon and energy source for growth while oxidizing pollutants. The treated water, after processes such as sedimentation and filtration, meets discharge standards, while the recycled activated sludge can be reused in subsequent treatment cycles. |
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Copyright
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No
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Owner of data set
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Quantitative reference
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Reference flow(s)
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Technological representativeness
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Technology description including background system
| In municipal wastewater treatment, the anoxic/anaerobic treatment process exhibits the following technical characteristics:Anoxic Treatment Zone: This process includes an anoxic treatment zone where water is exposed to low or zero oxygen conditions, promoting nitrogen and phosphorus removal while reducing nitrification, thus lowering oxygen demand and energy consumption.Nitrogen and Phosphorus Removal Efficiency: The anoxic treatment zone facilitates effective removal of nitrogen and phosphorus through denitrification and phosphorus release under anoxic conditions, enhancing treatment efficiency.Operational Conditions: In the anoxic treatment zone, strict control of oxygen supply is necessary to maintain low oxygen conditions, while oxygen supply and mixing rates in aerobic zones must also be controlled. Operators need to adjust parameters such as influent water quality, flow rate, and treatment requirements to ensure optimal treatment performance.Related Upstream and Downstream Processes: Upstream processes for the anoxic/anaerobic treatment process include wastewater pretreatment such as screening, grit removal, and sedimentation to remove large particles and settleable solids. Downstream processes may include further oxidation, sedimentation, or filtration to ensure the final treated water quality meets discharge standards. |