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Sludge thickening or dewatering process, uses combination of sludge weight and solids content measurements and disposal and operating cost values to optimize a total cost value
Sludge thickening or dewatering process, uses combination of sludge weight and solids content measurements and disposal and operating cost values to optimize a total cost value
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机译:污泥浓缩或脱水过程,结合污泥重量和固体含量测量以及处置和运行成本值来优化总成本值
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摘要
Sludge input and exit flow measurements relating to weight and dry solids content are carried out and combined with disposal and operating cost factors to give a total cost value which is used to regulate the control parameters in order to reduce this total cost value. A sludge thickening and/or dewatering process comprises the following steps : (b) carrying out measurements to determine the output weight (Moe) representing the weight of the sludge exit flow per unit time ; (c) determining sludge disposal cost (Ks-afz.) by multiplying the output weight value with a pre-determined disposal tariff (fafz) per weight of sludge ; (d) determining a dry solids end value (Vuit) giving the weight of dry solids per unit time for the exit flow of sludge ; (e) determining the dry solids disposal costs (Kds-afz.) by dividing the sludge disposal cost by the dry solids end value ; (f) determining the operating costs (Kbedr.) per dry solids output by adding up at least one fixed operating cost (Kvast) per time unit and/or at least one variable operating cost (Kvar) per time unit depending on process parameters, and then dividing this sum by the dry solids end value ; (g) determining total cost (Ktot) by adding the cost values obtained in steps (e) and (g) ; and (h) regulating control parameters in order to reduce the total cost value obtained in step (g). Independent claims are also included for (a) the process apparatus, (b) a signal processing device for this apparatus, and (c) a data carrier for the signal processing device, provided with computer-readable instructions.
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