Impact of Saddle-Chips biocarrier on treating mariculture wastewater by moving bed biofilm reactor (MBBR): Mechanism and kinetic study

被引：28

作者：

Tadda, Musa Abubakar ^{[1
,2
,3
]}

Altaf, Rubina ^{[1
]}

Gouda, Mostafa ^{[1
,4
]}

Rout, Prangya Ranjan ^{[1
]}

Shitu, Abubakar ^{[1
,2
]}

Ye, Zhangying ^{[1
]}

Zhu, Songming ^{[1
]}

Liu, Dezhao ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Biosyst Engn & Food Sci, Key Lab Equipment & Informatizat Environm Control, Minist Agr & Rural Affairs, Hangzhou 310058, Peoples R China

[2] Bayero Univ, Fac Engn, Dept Agr & Environm Engn, Kano 700241, Nigeria

[3] Org African Acad Doctors OAAD, Off Kamiti Rd,POB 25305-00100, Nairobi, Kenya

[4] Natl Res Ctr, Dept Nutr & Food Sci, Giza, Egypt

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2021年 / 9卷 / 06期

关键词：

Kinetic study; K5-biocarrier; Biopolymer release; Grau's 2nd-order model; Biocarrier filling ratio (FR); Partial least squares-discriminant analysis (PLS-DA); HYDRAULIC RETENTION TIME; CARRIER FILLING RATIO; NITROGEN REMOVAL; START-UP; PERFORMANCE; NITRIFICATION; DENITRIFICATION; BIOREACTOR; COMMUNITY; NITRITE;

D O I：

10.1016/j.jece.2021.106710

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Packing carrier is a key factor for moving bed biofilm reactors (MBBRs) treating ammonia polluted wastewater such as in mariculture aquaculture but lacks sufficient research. In this study, a new type of biocarrier, Saddle-Chips (SC), was applied for treating mariculture wastewater (30 parts per thousand salinity) and compared with commonly used Kaldnes-5 (K5-biocarrier), using lab-scale MBBRs. The effects of ammonia concentrations, hydraulic retention times (HRTs), filling ratios (FRs), and ammonia shock-loading on MBBRs' performances were examined. In the results, the new SC-biocarrier showed a slightly higher NH4+-N removal efficiency (NRE) than K5 (p > 0.05). Higher HRTs (24 and 12 h) yielded higher nutrients removal efficiency despite low biomass productivities initially. Moreover, 60% FR showed higher nutrients removal due to higher biomass than 30% FR (p < 0.05). Meanwhile, biopolymers released from the SC-biocarrier and ammonia shock-loading resulted in significantly (p < 0.05) higher Nitrospira abundance in MBBRs containing SC-biocarriers. Biofilm characterization through Fourier Transform Infrared (FTIR) Spectroscopy and Scanning Electron Microscope (SEM) revealed proteins, carbohydrates, lipids, RNA, and DNA traces in the biofilms involved. The Grau's 2nd-order kinetics employed fitted well to the obtained results, predicting effluent NH4+-N concentrations and HRTs with high precision (R-2 > 0.98). Overall, the nitrogenous pollutants' high removal efficacy, biopolymer release capability, and excellent hydrodynamics revealed by the SC-biocarrier highlight its large-scale suitability in treating mariculture wastewater and other wastewater types.

引用

页数：12

共 61 条

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