COMPARATIVE PILOT TEST OF CATALYTIC OZONE OXIDATION AND NaClO IN TREATING TITANIUM DIOXIDE WASTEWATER

FANG Guang-jun; WANG Ye-xin; LI Li

doi:10.13205/j.hjgc.202111020

Volume 39 Issue 11

Jan. 2022

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FANG Guang-jun, WANG Ye-xin, LI Li. COMPARATIVE PILOT TEST OF CATALYTIC OZONE OXIDATION AND NaClO IN TREATING TITANIUM DIOXIDE WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(11): 154-158. doi: 10.13205/j.hjgc.202111020

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COMPARATIVE PILOT TEST OF CATALYTIC OZONE OXIDATION AND NaClO IN TREATING TITANIUM DIOXIDE WASTEWATER

doi: 10.13205/j.hjgc.202111020

1. Sinochem Environment Holdnings Co., Ltd, Beijing 100071, China;
2. Sinochem Environment Science and Technology Engineering Co., Ltd, Shenyang 110000, China

Received Date: 2021-07-27
Available Online: 2022-01-26

Abstract

Abstract

Taking the secondary pressure filtration water from a titanium dioxide plant in Shandong as the research object, the catalytic ozonation process and the treatment of titanium dioxide wastewater were investigated through a self-designed pilot plant, and the best experimental conditions for catalytic ozonation process were determined as follows:at room temperature, the catalytic ozone oxidation reaction time was 60 min, and the ozone concentration was 125 mg/L. The original NaClO process was also optimized, and the best process after optimization was as follows:NaClO dosage was 1.2%, and the reaction time was 30 minutes. When the average influent COD and ammonia nitrogen were 109.7 mg/L and 12.8 mg/L, the average effluent COD and ammonia nitrogen of the catalytic ozone process were 43.5 mg/L and 3.8 mg/L, respectively, and the average removal rates were 60% and 70.4%, respectively; and the average effluent COD and ammonia nitrogen in the NaClO process were 49.8 mg/L and 4.7 mg/L, respectively, and the average removal rates were 54.5% and 63.1%, respectively. Within 30 days, the standard-meeting rate of the catalytic ozonation process effluent was 100%, and that of the NaClO process effluent was 26.7%; the running cost of catalytic ozonation ton water treatment was RMB 1.12/t, and that of the NaClO treatment was RMB 12/t. The catalytic ozonation process was more suitable for treating titanium dioxide wastewater, compared with The NaClO oxidation process.
- catalytic ozone oxidation,
- NaClO,
- ammonia nitrogen,
- pilot test

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References

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