Journal Facts

Journal
Journal of Environmental Systems
ISSN
0047-2433 (print) 1541-3802 (electronic)
Volume
33
Issue
2
Date
1/1/2011

Article Facts

Title
Effect of Tertiary Treatment on Chemically Complex Secondary Wastewater
DOI
10.2190/ES.33.2.d
Authors
  • Liu Jingming
  • Chen Yanyan
  • Zhang Wei
  • Shi Yunfen
  • Zhu Zhirong
Pages
121-131
Online Date
04/09/2012

Article Links

Effect of Tertiary Treatment on Chemically Complex Secondary Wastewater

Liu Jingming
Chen Yanyan
Zhang Wei
Shi Yunfen
Zhu Zhirong

DOI: 10.2190/ES.33.2.d

Abstract

Biochemical characteristics of chemical secondary effluent in tertiary treatment were studied with a piloted system of biological contact aerators to meet national discharge limits. The results showed that biochemical characteristics of the secondary effluent had higher concentrations of residual COD and NH3-N, as well as lower residual concentrations of BOD5 and alkalinity. Residual COD in the effluent consisted mainly of three parts including the non-biodegradable COD presented by organic matter of toxicity, the soluble COD presented by BOD5, and the particulate COD presented by SS. Under conditions of non-biodegradable COD concentration of 132.70 mg/L and less alkalinity, NH3-N effluent concentrations were decreased from 30.44 mg/L to 14.79 mg/L, and a scientific basis of reference was provided for reforming the pulse flocculated clarifier system which can be a new dimension for wastewater treatment.

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