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On-line Access: 2010-01-01

Received: 2009-03-10

Revision Accepted: 2009-07-06

Crosschecked: 2009-11-17

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Journal of Zhejiang University SCIENCE A 2010 Vol.11 No.2 P.132-142


Treatment and hydraulic performances of the NiiMi process for landscape water

Author(s):  Jian YANG, Liang-bo ZHANG, Yi-fan WU, Ya-yi WANG, Cui LI, Wen LIU

Affiliation(s):  State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

Corresponding email(s):   yj4275@126.com

Key Words:  NiiMi system, Landscape water, Purification efficiency, Hydraulic efficiency, Tracers

Jian YANG, Liang-bo ZHANG, Yi-fan WU, Ya-yi WANG, Cui LI, Wen LIU. Treatment and hydraulic performances of the NiiMi process for landscape water[J]. Journal of Zhejiang University Science A, 2010, 11(2): 132-142.

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author="Jian YANG, Liang-bo ZHANG, Yi-fan WU, Ya-yi WANG, Cui LI, Wen LIU",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Treatment and hydraulic performances of the NiiMi process for landscape water
%A Jian YANG
%A Liang-bo ZHANG
%A Yi-fan WU
%A Ya-yi WANG
%A Cui LI
%A Wen LIU
%J Journal of Zhejiang University SCIENCE A
%V 11
%N 2
%P 132-142
%@ 1673-565X
%D 2010
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A0900437

T1 - Treatment and hydraulic performances of the NiiMi process for landscape water
A1 - Jian YANG
A1 - Liang-bo ZHANG
A1 - Yi-fan WU
A1 - Ya-yi WANG
A1 - Cui LI
A1 - Wen LIU
J0 - Journal of Zhejiang University Science A
VL - 11
IS - 2
SP - 132
EP - 142
%@ 1673-565X
Y1 - 2010
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A0900437

This paper describes the NiiMi process designed to treat landscape water. The main aim of the research was to investigate the feasibility of NiiMi for removing organic and nutriment materials from landscape water. During the batch-scale NiiMi operation, the removal rates of color ranged from 66.7%–80%, of turbidity from 31.7%–89.3%, of chemical oxygen demand (COD) from 7%–36.5%, of total phosphor (TP) from 43%–84.2%, of soluble phosphate from 42.9%–100%, of total nitrogen (TN) from 4.2%–46.7%, and of NH4+-N from 39.3%–100% at the hydraulic loading of 0.2 m3/(m2·d). Results showed that the removal efficiencies of COD, TP, soluble phosphate and TN decreased with the decline in the temperature. The NiiMi process had a strong shock loading ability for the removal of the organics, turbidity, TP, soluble phosphate, TN and NH4+-N. Three sodium chloride tracer studies were conducted, labeled as TS1, TS2, and TS3, respectively. The mean hydraulic retention times (mean HRTs) were 31 h and 28 h for TS1 and TS2, respectively, indicating the occurrence of a dead zone volume of 12% and 20% for TS1 and TS2, respectively. TS1 and TS2 displayed the occurrence of short-circuiting in the niiMi system. The comparison results between TS1 and TS2 were further confirmed in the values obtained for some indicators, such as volumetric efficiency (e), short-circuiting (S), hydraulic efficiency (λ) and number of continuously stirred tank reactors (N).

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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