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Plant-wide Optimization of a Full-Scale Activated Sludge Plant with Anaerobic Sludge Treatment

机译：厌氧污泥处理的全规模活性污泥厂的全厂优化

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This paper presents the application of a plant-wide model-based methodology to wastewater treatment plants. The focus is on a tertiary activated sludge plant with anaerobic sludge treatment, owned and operated by Sydney Water. A dynamic plant-wide model is first developed and calibrated using historical data. A scenario-based optimization procedure is then applied for computing the effect of key discharge constraints on the minimal net power consumption, via the repeated solution of a dynamic optimization problem. The results show a potential for reduction of the energy consumption by about 20%, through operational changes only, without compromising the current effluent quality. It is also found that nitrate (and hence total nitrogen) discharge could be reduced from its current level around 22 mg(N)/L to less than 15 mg(N)/L with no increase in net power consumption, and could be further reduced to <10 mg(N)/L subject to a 15% increase in net power consumption upon diverting part of the primary sludge to the secondary treatment stage. This improved understanding of the relationship between nutrient removal and energy use will feed into discussions with environmental regulators regarding nutrient discharge licensing.
机译：本文介绍了基于工厂模型的方法在废水处理厂中的应用。重点是由悉尼水务公司（Sydney Water）拥有和运营的具有厌氧污泥处理的第三级活性污泥厂。首先使用历史数据开发并校准动态全工厂模型。然后，通过重复解决动态优化问题，将基于方案的优化过程应用于计算关键放电约束对最小净功耗的影响。结果表明，仅通过更改操作，就可以将能耗降低约20％，而不会影响当前的出水水质。还发现硝酸盐（因此总氮）的排放量可以从目前的水平（约22 mg（N）/ L）降低到小于15 mg（N）/ L，而不会增加净功耗，并且可能会进一步增加降低至<10 mg（N）/ L，将部分主要污泥转移到第二处理阶段后，净电力消耗将增加15％。对养分去除与能源使用之间关系的这种更好的理解将有助于与环境监管机构就养分排放许可进行讨论。

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