Performance evaluation of down-flow hanging sponge reactor for direct treatment of actual textile wastewater; Effect of effluent recirculation to performance and microbial community

被引：32

作者：

Watari, Takahiro ^{[1
,2
]}

Hata, Yuya ^{[1
,4
]}

Hirakata, Yuga ^{[3
,8
]}

Phan Nhu Nguyet ^{[1
,7
]}

Thu Huong Nguyen ^{[3
]}

Maki, Shinya ^{[3
]}

Hatamoto, Masashi ^{[1
]}

Sutani, Daisuke ^{[4
]}

Setia, Tjandra ^{[5
,6
]}

Yamaguch, Takashi ^{[1
,3
]}

机构：

[1] Nagaoka Univ Technol, Dept Civil & Environm Engn, Niigata 9402188, Japan

[2] Hanoi Univ Sci & Technol, Dept Chem Engn, Hanoi, Vietnam

[3] Nagaoka Univ Technol, Dept Sci Technol Innovat, Niigata 9402188, Japan

[4] Nihon Suido Consultants Co Ltd, Tokyo 1631122, Japan

[5] Inst Teknol Bandung, Dept Chem Engn, Jl Ganesa 10, Bandung 40132, Indonesia

[6] Inst Teknol Bandung, Ctr Environm Studies PSLH, Jl Sangkuriang 42 A, Bandung 40135, Indonesia

[7] Vietnam Natl Univ Ho Chi Minh City, Univ Sci, Fac Environm, 227 Nguyen Van Cu, Ho Chi Minh City, Vietnam

[8] Natl Inst Adv Ind Sci & Technol, Bioprod Res Inst, Tsukuba, Ibaraki, Japan

来源：

JOURNAL OF WATER PROCESS ENGINEERING | 2021年 / 39卷

关键词：

Textile wastewater; trickling filter reactor; biological wastewater treatment; ACTIVATED-SLUDGE; UASB REACTOR; AZO DYES; AROMATIC-AMINES; DECOLORIZATION; SYSTEM; DENITRIFICATION; BIODEGRADATION; DEGRADATION; WASTEWATERS;

D O I：

10.1016/j.jwpe.2020.101724

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The textile industry discharges large amounts of polluted wastewater containing synthetic dyes. A down-flow hanging sponge (DHS) reactor is a novel aerobic wastewater treatment process that utilizes a sponge as a biomass-retaining carrier. This sponge carrier has both aerobic and anaerobic zones owing to different dissolved oxygen concentrations. In this study, the process performance of a DHS reactor treating actual textile wastewater obtained from a factory in Japan was evaluated. The effects of hydraulic retention time (HRT) and effluent recirculation (recirculation ratio = 1) on the DHS process performance were investigated. The DHS reactor showed good organic (up to 93 +/- 13% of BOD) and nitrogen removal (56 +/- 14% of TN) abilities during the entire experimental period. The color removal efficiencies of the DHS reactor were 55 +/- 15%, 53 +/- 26%, 72 +/- 34%, and 35 +/- 22% with HRTs of 4 h, 4 h + effluent recirculation (R = 1), 8 h + effluent recirculation (R = 1), and 8 h, respectively. Microbial community structure analysis of the DHS retained sludge showed that genus Acinetobacter was detected predominantly and reported as an azo dye-degrading bacterium. Effluent recirculation was also observed to increase the presence of aromatic-degrading bacteria and protists in the DHS reactor. These results suggest that the DHS reactor is suitable for textile wastewater treatment. Furthermore, the effluent recirculation is effective for enhancing decolorization performance.

引用

页数：8

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