HU Fan,WANG Shun,GAN Li-chuan,et al.Treatment of Wastewater from Synthesis of Hydrazine Hydrate by Keto Hydrazine Method in a Pilot-scale Test[J].China Water & Wastewater,2021,37(9 9):97-99.
Treatment of Wastewater from Synthesis of Hydrazine Hydrate by Keto Hydrazine Method in a Pilot-scale Test
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
9 9
Page:
97-99
Column:
Date of publication:
2021-05-01
- Keywords:
- wastewater from synthesis of hydrazine hydrate by keto hydrazine method; Hi-SOT oxidation tower; hydrolytic acidification; A/O
- Abstract:
- The wastewater from synthesis of hydrazine hydrate by keto hydrazine method in a company in Sichuan Province has the problems of containing special types of pollutants, strong biological toxicity and difficult to treat.A pilot-scale test with treatment process of “Hi-SOT oxidation tower + hydrolytic acidification + A/O+sedimentation tank” was carried out to investigate the quality of the wastewater, dosage ratio of O3 and COD in the Hi-SOT oxidation tower, tolerance of microbe to toxicity in the hydrolytic acidification tank and overall performance of the pilot system. The results showed that good performance of the pilot system was achieved after more than six months of continuous operation. COD and NH3-N in the effluent were always less than 50 mg/L and 5 mg/L, respectively, and the removal efficiencies were 94% and 98.7%.
Last Update:
2021-05-01