Managed aquifer recharge (MAR) is the intentional recharge of water to suitable aquifers for subsequent beneficial use or to achieve environmental benefits. Well injection techniques for MAR, such as Aquifer Storage and Recovery (ASR), rely on implementing appropriate design and defining the operational parameters to minimise well clogging and maintain sustainable rates of recharge over the long term. The purpose of this study was to develop water quality targets and pre-treatment requirements for recycled water to allow sustained recharge and recovery in a medium-coarse siliceous aquifer. The recharge water is a blend of 40% Class A recycled water and 60% reverse osmosis (RO)-treated Class A recycled water. Four source waters for MAR were evaluated: (1) this blend with no further treatment, and this blend with additional treatment using: (2) a 20 µm sediment cartridge filter, (3) a 5 µm sediment cartridge filter, or (4) a 5 µm granular activated carbon (GAC) cartridge filter. All four treatment options were also further disinfected with chlorine. The four blended and treated recycled waters were used in laboratory columns packed with aquifer material under saturated conditions at constant temperature (20.7 °C) with light excluded for up to 42 days. Substantial differences in the changes in hydraulic conductivity of the columns were observed for the different treatments within 14 days of the experiment, despite low turbidity (<2 NTU) of the blend waters. After 14 days, the GAC-treated water had a 7% decline in hydraulic conductivity, which was very different from the other three blend waters, which had declines of 39–52%. Based on these results and consistent with previous studies, a target biodegradable dissolved organic carbon (BDOC) level of <0.2 mg/L was recommended to ensure a biologically stable source of water to reduce clogging during recharge.

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评估再生水的处理要求，以管理含水层储存和恢复过程中的堵塞：澳大利亚 Werribee 地层的案例研究

管理含水层补给 (MAR) 是有意将水补给合适的含水层，以供后续有益使用或实现环境效益。MAR 的井注入技术，例如含水层存储和恢复 (ASR)，依赖于实施适当的设计和定义操作参数，以最大限度地减少井堵塞并长期保持可持续的补给率。本研究的目的是制定循环水的水质目标和预处理要求，以实现中粗硅质含水层的持续补给和恢复。补给水是 40% 的 A 级再生水和 60% 经反渗透 (RO) 处理的 A 级再生水的混合物。对 MAR 的四种源水进行了评估：(1) 该混合物未经进一步处理，该混合物采用以下额外处理：(2) 20 µm 沉淀物筒式过滤器，(3) 5 µm 沉淀物筒式过滤器，或 (4) 5 µm 颗粒活性炭 (GAC) 筒式过滤器。所有四种治疗方案也进一步用氯消毒。在恒温 (20.7 °C) 的饱和条件下，将四种混合和处理过的循环水用于填充含水层材料的实验室柱中，排除光长达 42 天。尽管混合水的浊度低 (<2 NTU)，但在实验的 14 天内观察到不同处理的柱子导水率变化存在显着差异。14 天后，GAC 处理的水的导水率下降了 7%，这与其他三种混合水的下降 39-52% 有很大不同。