Biological treatment of saline wastewaters in an aerobic sequencing batch reactor

被引：20

作者：

Deorsola, Adriana B. ^{[1
]}

Camarinha, Gilberto C. ^{[2
]}

Carvalho, Denize D. ^{[2
]}

Sant'Anna, Geraldo L., Jr. ^{[1
]}

机构：

[1] Univ Fed Rio Janeiro, COPPE, Chem Engn Program, Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, Escola Quim, Ilha Fundao, BR-21941909 Rio De Janeiro, Brazil

来源：

ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY | 2013年 / 32卷 / 02期

关键词：

saline wastewater; sequencing batch reactor; biological treatment; FIELD WASTE-WATER; ACTIVATED-SLUDGE; HALOPHILIC BACTERIA; SALT CONCENTRATION; BIOFLOCCULATION; PERFORMANCE;

D O I：

10.1002/ep.10634

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The influence of different chloride salts (sodium, potassium, calcium, and magnesium) on wastewater biological treatment performance was investigated. Long term assays were performed (30 d) operating aerobic sequencing batch reactors (SBR) with a 24-h cycle (23 h of reaction and 1 h of sedimentation and draining). Salt content varied from 0% to 6% m/v in different assays, using synthetic wastewater with an average COD of 2000 mg/L. When salt was not added to the SBR influent chemical oxygen demand (COD) removal averaged 95%. For the higher salt concentration tested (6% m/v), average COD removals for NaCl, KCl, MgCl2, and CaCl2 were, respectively, 81%, 92%, 83%, and 87%. Some deleterious effects caused by salt concentration were: reduction of protozoa population and diversity and sludge deflocculation, which caused a rise on the SBR effluent turbidity. (c) 2011 American Institute of Chemical Engineers Environ Prog, 32: 198-205, 2013

引用

页码：198 / 205

页数：8

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