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Keywords = wastewater from soaking of Pinellia Ternata with alumen

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18 pages, 1511 KiB  
Article
A Novel Coupling of a Biological Aerated Filter with Al3+ Addition-O3/H2O2 with Microbubble for the Advanced Treatment of Proprietary Chinese Medicine Secondary Effluent
by Shilin Yi, Yan Tai, Rui Wang, Yuehan Jiang, Luwei Zhou, Guomin Tang, Ying Xv, Chengwei Hua and Xuemin Yue
Water 2024, 16(14), 2030; https://doi.org/10.3390/w16142030 - 17 Jul 2024
Viewed by 1066
Abstract
The advanced treatment of proprietary Chinese medicine secondary effluent (PCMSE) was strongly needed with the recent implementation of a more stringent discharge standard. Based on the features of PCMSE and the reuse of Al3+ from wastewater from soaking of Pinellia Ternata with [...] Read more.
The advanced treatment of proprietary Chinese medicine secondary effluent (PCMSE) was strongly needed with the recent implementation of a more stringent discharge standard. Based on the features of PCMSE and the reuse of Al3+ from wastewater from soaking of Pinellia Ternata with alumen (WSPTA), three new combined processes were designed for the advanced treatment of PCMSE on a larger pilot scale. A pilot scale study showed that compared with two other combined processes, the new coupling of a biological-aerated filter with Al3+ addition (BAFA)-O3/H2O2 with microbubble (OHOMB) (CBAFAOHOMB) obtained the maximum pollutant removal (with removals of 91.71%, 94.64%, and 82.32% being observed for color, total phosphorus (TP), and chemical oxygen demand (COD), respectively) and acquired the lowest Al3+ residual in the effluent. During CBAFAOHOMB treatment of PCMSE, the vast majority of TP elimination, 35.20% of COD removal, and 49.40% of color removal were achieved by BAFA; OHOMB obtained 64.80% of COD removal and 60.60% of color removal, and biofilm activity in BAFA slightly changed under a 10 mg/L Al3+ dose. Furthermore, microbubble aeration was more efficient in removing organics than conventional bubble aeration during O3/H2O2 oxidation, and suspended solid (SS) relatively significantly lowered oxidation ability in the OHOMB system. These results indicated that CBAFAOHOMB markedly integrated advantages of BAFA and OHOMB, and was a proposed process for the advanced treatment of PCMSE. Meanwhile, it was feasible that WSPTA was reused for PCMSE treatment as an Al3+ source. Full article
(This article belongs to the Section Wastewater Treatment and Reuse)
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