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首页> 外文期刊>Journal of water reuse and desalination >Stormwater reuse treatment requirements and screening-level risk assessment at two urban spatial scales
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Stormwater reuse treatment requirements and screening-level risk assessment at two urban spatial scales

机译：两个城市空间尺度上的雨水回用处理要求和筛选级风险评估

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Monitoring was conducted at two urban spatial scales (lot-scale road surface and residential subdivision) to assess treatment requirements for non-potable stormwater reuse by irrigation. A screening-level risk assessment was also made focusing on metals, nutrients, cations and pesticides. Composite stormwater samples were taken at two locations in Toowoomba, Australia. Road runoff had higher treatment requirements for suspended solids but less for disinfection. No organic load or salinity reduction is generally needed, and pH adjustment is an occasional requirement for road runoff only. For both stormwaters, hardness was rated at very soft, which may potentially increase corrosion of irrigation equipment. Sodium adsorption ratios were also low indicating a limited risk of soil degradation under irrigation. Nutrient and metal concentrations also pose a low risk. High turbidity and low alkalinity of road runoff makes it easier to treat with coagulants compared to the subdivision runoff. Pesticide analysis of 121 compounds found road runoff concentrations below levels of detection, except for Simazine and Hexazinone. Although detectable, these pesticide concentrations were within Australian drinking water guidelines.
机译：在两个城市空间尺度（地块规模的路面和居民区）上进行了监测，以评估灌溉非饮用水回用的处理要求。还对金属，营养素，阳离子和农药进行了筛查级风险评估。在澳大利亚图沃柏的两个地点采集了复合雨水样本。道路径流对悬浮物的处理要求较高，但对消毒的要求较低。通常不需要减少有机负荷或降低盐分，pH调节只是偶尔用于道路径流的要求。对于这两种雨水，其硬度被评定为非常柔软，这可能会增加灌溉设备的腐蚀。钠吸附率也很低，表明灌溉条件下土壤退化的风险有限。营养和金属浓度也较低。与细分径流相比，道路径流的高浊度和低碱度使其更易于使用混凝剂进行处理。对121种化合物的农药分析发现，除Simazine和Hexazinone外，道路径流浓度低于检测水平。尽管可以检测到，但这些农药的浓度在澳大利亚饮用水准则之内。

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