EXPERIMENTAL STUDY ON REDUCTION OF OXYTETRACYCLINE RESIDUE BY ALKALINITY OF NaOH’s DOSAGES

QI Guo-ping; LI Wei-wei; NIU Yong-jian; NING Gao-yang; SUN Hong-wei

doi:10.13205/j.hjgc.202011023

Volume 38 Issue 11

Apr. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(11): 140-144,151

QI Guo-ping, LI Wei-wei, NIU Yong-jian, NING Gao-yang, SUN Hong-wei. EXPERIMENTAL STUDY ON REDUCTION OF OXYTETRACYCLINE RESIDUE BY ALKALINITY OF NaOH’s DOSAGES[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 140-144,151. doi: 10.13205/j.hjgc.202011023

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QI Guo-ping, LI Wei-wei, NIU Yong-jian, NING Gao-yang, SUN Hong-wei. EXPERIMENTAL STUDY ON REDUCTION OF OXYTETRACYCLINE RESIDUE BY ALKALINITY OF NaOH’s DOSAGES[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 140-144,151. doi: 10.13205/j.hjgc.202011023

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EXPERIMENTAL STUDY ON REDUCTION OF OXYTETRACYCLINE RESIDUE BY ALKALINITY OF NaOH’s DOSAGES

doi: 10.13205/j.hjgc.202011023

1. Gansu Province Light Industry Research Institute, Lanzhou 730030, China;
2. College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
3. Gansu Sewage Treatment Industry Technical Center, Lanzhou 730070, China

Received Date: 2020-02-11
Available Online: 2021-04-23
Publish Date: 2021-04-23

Abstract

Abstract

In order to explore the influence of NaOH dosage acting on the contents of SS, TS, oxytetracycline and COD during alkal-water heat treatment, the alkali dosage was controlled as 0.06 g NaOH/g TS, 0.08 g NaOH/g TS, 0.10 g NaOH/g TS, 0.12 g NaOH/g TS and 0.14 g NaOH/g TS respectively, reacting for 2 h at 120 ℃. Before and after reaction, we measured the contents of TS, SS, oxytetracycline, COD and pH value. It was found that reduction quantity rates of TS and SS in the miscible liquids all increased significantly with the increase of NaOH dosage at first, and then decreased slightly, and all reached the maximum(14.36% and 44.13% respectively ) when the alkali dosage was 0.12 g NaOH/g TS. The change trend of COD dissolution efficiency was similar to the removal efficiency of SS, and the maximum dissolution efficiency (45.82%) was achieved when the alkali dosage was 0.12 g NaOH/g TS. Therefore, the highest cytolytic decrease efficiency of bacterial residue was achieved when the alkali dosage was 0.12 g NaOH/g TS. But the change trend of oxytetracycline reduction efficiency was reversed, as the excessive alkali dosage was not conducive to the removal of oxytetracycline, and the reduction quantities of oxytetracycline reached the peak with an average value of 99.99% when the alkali dosage was 0.08 g NaOH/g TS. The pH value decreased significantly after the reaction, and its extent was positively related to the reduction rates of TS and SS.
- oxytetracycline residue,
- alkali-hydrothermal treatment,
- NaOH dosage,
- decrement

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