FUNCTION OF MICROORGANISMS IN WATER PURIFICATION： A CASE STUDY OF THE QING-YI RIVER

MA Yiming; HAO Ziyao; HUANG Zehan; WANG Lanqi; YU Luji

doi:10.13205/j.hjgc.202202004

Volume 40 Issue 2

Apr. 2022

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MA Yiming, HAO Ziyao, HUANG Zehan, WANG Lanqi, YU Luji. FUNCTION OF MICROORGANISMS IN WATER PURIFICATION： A CASE STUDY OF THE QING-YI RIVER[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 20-26. doi: 10.13205/j.hjgc.202202004

Citation:

MA Yiming, HAO Ziyao, HUANG Zehan, WANG Lanqi, YU Luji. FUNCTION OF MICROORGANISMS IN WATER PURIFICATION： A CASE STUDY OF THE QING-YI RIVER[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 20-26. doi: 10.13205/j.hjgc.202202004

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FUNCTION OF MICROORGANISMS IN WATER PURIFICATION： A CASE STUDY OF THE QING-YI RIVER

doi: 10.13205/j.hjgc.202202004

1. College of Ecology and Environment, Zhengzhou University， Zhengzhou 450001, China;
2. Multi-functional Design and Research Academy, Zhengzhou University， Zhengzhou 450003, China;
3. Central Plains Environment Protection， Zhengzhou 450003, China

Received Date: 2020-04-19
Available Online: 2022-04-02
Publish Date: 2022-04-02

Abstract

Abstract

The self-purification of water bodies is of great significance in the study of water environment. Microorganisms are the main bearers of self-purification of water bodies. In order to study the role of microorganisms in self-purification of water bodies, this study used degradation coefficients to characterize the self-purification of water bodies to COD, ammonia nitrogen, TN and TP. To use mercury chloride inactivated microorganisms as a control group, the degradation coefficient was divided into comprehensive degradation and biological degradation. In-situ degradation coefficient calculation experiments were carried out in three characteristic sections of the Qing-Yi River, and typical sections were selected for high-throughput microbial detection. The results showed that: 1) the main groups of microorganisms in the river were the common obligate aerobic genus such as Pyricularia sp., Thermomonas sp, and a small number of genus bacteria capable of nitrification. 2) The biodegradation coefficients of COD and ammonia nitrogen were positively correlated with their comprehensive degradation coefficients, and the proportion of biodegradation was high, 78% and 42%, respectively. TN and TP had no significant relationship, indicating that COD and ammonia nitrogen were more dependent on biological self-purification than TN and TP in the river channel. 3) Through fitting the biodegradation coefficient with the comprehensive degradation coefficient, and combining the first-order kinetic degradation equation, the equation between the initial concentration and the concentration after comprehensive degradation and biological degradation was deduced.
- river self-purification,
- degradation coefficients,
- first order dynamic simulation,
- biological degradation

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References(28)

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