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首页> 外文期刊>Transactions of the ASABE >DESIGN CRITERIA FOR THE TREATMENT OF MILKING FACILITY WASTEWATER IN A COLD WEATHER VERTICAL FLOW WETLAND
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DESIGN CRITERIA FOR THE TREATMENT OF MILKING FACILITY WASTEWATER IN A COLD WEATHER VERTICAL FLOW WETLAND

机译：寒流垂直流湿地挤奶厂废水的设计标准

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摘要

Wastewater produced by milking facilities is harmful to the environment if not properly managed but can be costly to treat. A field demonstration of a constructed, vertical flow, subsurface treatment wetland (also known as a vegetated gravel contactor) in mid-Michigan has had continual success for over five years. However, the wetland's design was not optimized. Data from two lab-scale wetlands that simulated the field installation were collected and analyzed in order to create sizing and design criteria. Nutrients, including phosphorus, organic matter, total nitrogen, ammonia, and nitrate, were monitored as well as pH and chemical oxygen demand. The design and sizing are dependent on the configuration of the milking facility, specifically if the wash water contains significant amounts of manure. Nitrogen levels in the manure-contaminated wash water were three times higher than in the manure-free wash water. Although the manure-free and manure-contaminated wash waters had similar levels of carbon, the manure-contaminated wetland had high nitrogen levels. As a result, the acceptable loading differed between the wetlands: the manure-contaminated wash water loading was determined by nitrogen removal, and the manure-free wash water loading was determined by carbon removal. Phosphorus treatment was adequate, but temporary, as the wetland media lost capacity with time.
机译：如果管理不当，挤奶设施产生的废水会对环境有害，但处理成本很高。密歇根州中部一个人工建造的垂直流动的地下处理湿地（也称为植被砾石接触器）的现场演示已连续五年取得了成功。但是，湿地的设计并未优化。收集并分析了来自两个实验室规模的湿地的数据，这些数据模拟了现场安装情况，以建立规模和设计标准。监测营养素，包括磷，有机物，总氮，氨和硝酸盐，以及pH和化学需氧量。设计和尺寸取决于挤奶设备的配置，特别是在洗涤水中含有大量肥料的情况下。受粪肥污染的洗涤水中的氮含量是无粪肥洗涤水中的三倍。尽管无粪便和受粪便污染的洗涤水的碳含量相似，但受粪便污染的湿地的氮含量很高。结果，湿地之间的可接受负荷不同：通过除氮确定了受粪便污染的洗涤水负荷，而通过除碳确定了无粪便的洗涤水负荷。磷处理是适当的，但是暂时的，因为湿地介质会随着时间的流逝失去能力。

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