比较了几种超滤和纳滤工艺的成本与传统液固分离的成本，以及小型设施中有无GAC吸附的成本。从中试研究中获得的原水质量、渗透通量、回收率、反冲频率和化学药剂用量等数据与之前开发的膜成本模型一起使用，以计算每种情况下的预期资本和运营成本。美国环境保护局的数据被用来估算常规处理成本。 所有膜工艺计算表明，与小型设施的常规处理相比（200000 m3/d或约5 mgd），每单位体积处理的总成本相当或更低。包括10个参考文献、表格和图表。

Costs of several ultrafiltration and nanofiltration processes are compared with the cost of conventional liquid-solid seperation with and without GAC adsorption for small facilities. Data on raw-water quality, permeate flux, recovery, frequency of backflushing, and chemical dosage obtained from a pilot study were used with a previously developed model for membrane costs to calculate anticipated capital and operating costs for each instance. Data from the US Environmental Protection Agency were used to estimate conventional treatment costs. All of the membrane process calculations showed comparable or lower total costs per unit volume treated compared with the conventional treatment for small facilities (<200,000 m3/d or about 5 mgd). Includes 10 references, tables, figures.