FATE OF VOLATILE ORGANIC-COMPOUNDS IN MUNICIPAL ACTIVATED-SLUDGE PLANTS

被引：39

作者：

PARKER, WJ ^{[1
]}

THOMPSON, DJ ^{[1
]}

BELL, JP ^{[1
]}

MELCER, H ^{[1
]}

机构：

[1] WASTEWATER TECHNOL CTR,DIV BIOL PROC,BURLINGTON,ON,CANADA

来源：

WATER ENVIRONMENT RESEARCH | 1993年 / 65卷 / 01期

关键词：

ACTIVATED SLUDGE; AEROBIC TREATMENT; BIODEGRADATION; MASS TRANSFER; PRIORITY POLLUTANTS; STRIPPING; VOLATILE ORGANIC COMPOUNDS;

D O I：

10.2175/WER.65.1.8

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The fate of volatile organic compounds (VOCs) in municipal activated sludge plants was investigated at pilot and full scale. More than 80% of the mass flow of nonchlorinated compounds was observed to be biodegraded while less than 20% was removed by stripping. Conversely, 46% of the mass flow of chlorinated compounds was biodegraded and 47% was removed by stripping. Adsorption of VOCs onto waste sludge was not a significant removal mechanism. The pilot plant employed was found to effectively emulate the liquid-gas phase partitioning and overall compound removals observed in a full-scale plant. Little difference in liquid-gas phase partitioning was observed for coarse and fine pore diffusers in spite of differing mass-transfer characteristics as demonstrated by oxygen-transfer measurements. This implies that equilibrium between the liquid and gas-phase concentrations was achieved with both diffuser types. Stripping of VOCs was observed to increase with airflow; however, the extent of stripping increased at a declining rate.

引用

页码：58 / 65

页数：8

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