|Table of Contents|

Pretreatment of land treatment system with microorganism immobilized tower filter tank(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2013年02期
Page:
107-110
Research Field:
Publishing date:

Info

Title:
Pretreatment of land treatment system with microorganism immobilized tower filter tank
Author(s):
ZHAI Wei-min
China Railway First Survey and Design Institute Group 2td, Xi'an 710065, Shaanxi, China
Keywords:
environmental engineering;  immobilized microorganism technology;  tower biological filter tank;  land treatment system
PACS:
X703
DOI:
-
Abstract:
The tower bio-filter tank filled with nano-attapulgite composite hydrophilic polyurethane foam was set before the land treatment system to form a new treatment system to deal with domestic sewage. The treating effects of tower bio-filter tank and new treatment system were studied. The results show that the optimal operation condition of HRT is 60 min water stay and 75% of return ratio, and under this condition the removal rate of CODcr and NH3-N is 78.22% and 98.67% respectively. When the tower is set before the land treatment system, the blocking up will be decreased and the effects are better, and the removal rate of CODcr and NH3-N is increased from 72.24% and 32.81% to 95.97% and 96.69% respectively. The effluent of CODcr meets the Surface Water Environment Quality Standard(GB 3838—2002)V level standard, and the effluent of NH3-N meets the national Urban Sewage Treatment Plant Emission Standards(GB 18918—2002)A standard. 1 tab, 7 figs, 10 refs.

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Last Update: 2013-04-20