Evaluation of ozonation and cryptic growth for biosolids management in wastewater treatment

被引：20

作者：

Egemen, E ^{[1
]}

Corpening, J ^{[1
]}

Padilla, J ^{[1
]}

Brennan, R ^{[1
]}

Nirmalakhandan, N ^{[1
]}

机构：

[1] New Mexico State Univ, Civil Agr & Geol Engn Dept, Las Cruces, NM 88003 USA

来源：

WATER SCIENCE AND TECHNOLOGY | 1999年 / 39卷 / 10-11期

关键词：

activated sludge; bioreactors; biosolids; cryptic growth; microbial yield; ozonation;

D O I：

10.1016/S0273-1223(99)00267-X

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The ultimate disposal of biosolids has been and continues to be one of the most expensive problems faced by wastewater utilities. The objective of this research is to develop a process configuration for reducing the waste sludge generation in an activated sludge plant by promoting cryptic growth conditions (i.e., biomass growth on intracellular products). For this purpose, excess biosolids from a continuous flow activated sludge system were solubilized using ozone as the cell lysis agent, and then returned to the aeration tank. It is hypothesized that growth under such cryptic conditions will result in low net microbial yields, and hence, minimal net solids wastage. The results of these preliminary studies indicate that the proposed process configuration has the potential to reduce the waste sludge production by 40% to 60%. (C) 1999 Published by Elsevier Science Ltd on behalf of the IAWQ. All rights reserved.

引用

页码：155 / 158

页数：4

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