FILTRATION OF MUNICIPAL SEWAGE BY RING-SHAPED FLOATING PLASTIC NET MEDIA

被引：19

作者：

TANAKA, Y ^{[1
]}

MIYAJIMA, K ^{[1
]}

FUNAKOSI, T ^{[1
]}

CHIDA, S ^{[1
]}

机构：

[1] TOKYO METROPOLITAN GOVT,BUR SEWERAGE,DIV PLANNING,RES & DEV SECT,SHINJUKU KU,TOKYO 16301,JAPAN

来源：

WATER RESEARCH | 1995年 / 29卷 / 05期

关键词：

MUNICIPAL SEWAGE; FILTRATION; FLOATING MEDIA; COMBINED SEWER OVERFLOW; COAGULATION; POLYELECTROLYTE;

D O I：

10.1016/0043-1354(94)00288-I

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Characteristics of floating media filtration were examined to develop a process for primary treatment of municipal sewage during dry weather and high-rate treatment of combined sewer overflow during stormy weather. The media used for filtration were ring-shaped polypropylene net (2.2 cm in diameter, 2.5 cm in length and 6 mm in mesh size), which characteristically has a high void ratio (90%) and a low specific gravity (0.93). Experiments with bench scale and pilot scale filters showed that the removal rates of pollutants were 80-90% for suspended solids and 44% for BOD5 under an operating condition of 1000 m/day of flow velocity and 2-3 mg/l of cationic polyelectrolyte addition. Mass capture reached 7-10 kg/m(3) with a low head loss, less than 0.2 m, with a media depth of 2 m. High removal rate of suspended solids and low head loss should be principal advantages of the process.

引用

页码：1387 / 1392

页数：6

共 7 条

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[7]

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