| Study on Treatment Process of Exhaust Gas Absorption Waste Acid of RT Base Unit |
| Received:March 25, 2022 Revised:March 25, 2022 |
| DOI：10.12136/j.issn.1000-890X.2022.11.0862 |
| Key Words: RT base；exhaust gas absorption waste acid；Fenton process；aerobic activated sludge process；combined process |
| Author Name | Affiliation | E-mail | | HUANG Wei* | SINOPEC Nanjing Research Institute of Chemical Industry Co.，Ltd | huangw.nhgs@sinopec.com | | CHU Zheng | SINOPEC Nanjing Chemical Industry Co.， Ltd | | | Liu Zhuo | SINOPEC Nanjing Research Institute of Chemical Industry Co.，Ltd | | | GUAN Qingbao | SINOPEC Nanjing Research Institute of Chemical Industry Co.，Ltd | |
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| Abstract: |
| The treatment processes of the exhaust gas absorption waste acid in the whole section of RT
base device（hereinafter referred to as waste acid） were studied. When the waste acid was treated by the
tourmaline heterogeneous Fenton process，the optimum process conditions were as follows：the reaction
temperature was 20～25 ℃，the dosage of H2O2 was 30. 27 g·L-1，the dosage of tourmaline was 240 g·L-1，
and the reaction time was 10 h. The chemical oxygen demand（COD） removal rate of the waste acid was
about 35% under these optimum process conditions. When the waste acid was treated by the single-stage
aerobic activated sludge process，the COD removal rate reached 62. 63%. The Fenton-aerobic activated
sludge combined process could effectively treat the waste acid，and the COD removal rate rose to 98. 92%.
Moreover，the effluent COD of the combined process was 1 230 mg·L-1，and effluent could be directly
discharged into the sewage pipe network for further treatment. The model test device was then designed to
scale up the Fenton-aerobic activated sludge combined process. In the scale up test，the COD removal rate
of waste acid reached 98. 47%，and the effluent COD was 1 757 mg·L-1，which established a solid base for
further industrial scale test. |
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