TREATABILITY OF DNT PROCESS WASTE-WATER BY SUPERCRITICAL WATER OXIDATION

被引：32

作者：

LI, LX

GLOYNA, EF

SAWICKI, JE

机构：

[1] UNIV TEXAS,DEPT CIVIL ENGN,BETTIE MARGARET SMITH CHAIR ENVIRONM HLTH ENGN,AUSTIN,TX 78758

[2] UNIV TEXAS,BALCONES RES CTR,ENVIRONM HLTH ENGN PROGRAM,SUPERCRIT WATER OXIDAT PROJECT,AUSTIN,TX 78758

[3] UNIV TEXAS,BALCONES RES CTR,SEPARAT RES PROGRAM,AUSTIN,TX 78758

[4] AIR POLLUT TECHNOL INC,CHEM GRP MFG PROC TECHNOL,SAN DIEGO,CA 92109

来源：

WATER ENVIRONMENT RESEARCH | 1993年 / 65卷 / 03期

关键词：

NITRATION PROCESS WASTEWATERS; ORGANIC POLLUTANTS; SUPERCRITICAL WATER OXIDATION; TREATABILITY;

D O I：

10.2175/WER.65.3.9

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study focused on the treatment of dinitrotoluene (DNT) process wastewaters by supercritical water oxidation (SCWO). Major organic components found in the DNT process wastewaters were 2-nitrophenol, 4-nitrophenol, 2,4-dinitrophenol, 4,6-dinitro-ortho-cresol, phenol, and dinitrotoluene. Tests were conducted using a 20-cm3 batch reactor and two 120-cm3/min continuous-flow reactor systems. Separate oxidant tests employed oxygen and hydrogen peroxide. Organic destruction efficiencies of target compounds were obtained at supercritical and subcritical water conditions. Temperatures and pressures, respectively, ranged from 250-degrees-C to 500-degrees-C and 140 bar to 310 bar. The reaction times varied from 1 minute to 7 minutes. Wastewaters premixed with a biological sludge were also tested. SCWO was capable of destroying the U.S. Environmental Protection Agency (EPA) priority pollutants found in the DNT process wastewater. Under SCWO conditions, destruction efficiencies greater than 99% were achieved.

引用

页码：250 / 257

页数：8

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