Long-term effects of nickel oxide nanoparticles on performance, microbial enzymatic activity, and microbial community of a sequencing batch reactor

Wang, Sen; Li, Zhiwei; Gao, Mengchun; She, Zhigang; Guo, Liang; Zheng, Dan; Zhao, Yangguo; Ma, Bingrui; Gao, Feng; Wang, Xuejiao

doi:10.1016/j.chemosphere.2016.10.139

Cited by 26 publications

(5 citation statements)

References 35 publications

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“…Metal oxide NPs discharged into the environment could ultimately enter biological wastewater treatment systems. They could inhibit the organic matter and phosphorus removals, nitrification and denitrification of bioreactors treating wastewater (S. Wang et al, 2017) through obvious toxicity to microorganism, algae, aquatic invertebrate, terrestrial invertebrate and human tissue cell. Due to their small size and large specific surface area, NPs exhibit optical, electrical, and chemical characteristics different from either their bulk or dissolved forms.…”

Section: Carbon Nanotubes (Cnts)mentioning

confidence: 99%

Sequencing batch reactor technology for landfill leachate treatment: A state-of-the-art review

Jagaba

Kutty

Lawal

et al. 2021

Journal of Environmental Management

131

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Section: Carbon Nanotubes (Cnts)mentioning

confidence: 99%

Sequencing batch reactor technology for landfill leachate treatment: A state-of-the-art review

Jagaba

Kutty

Lawal

et al. 2021

Journal of Environmental Management

131

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“…It seems that the inner surface of the Kaldnes K1 carrier material covered by biofilm and resulted in the formation of effective and dense biofilm. Wang et al [42] reported that they observed similar formation of the effective biofilm on carrier material. SEM images showed that the different microorganisms consisted rod-shaped and filamentous cells on carrier material Figure 3(b).…”

Section: The Performance Of Anoxic Moving Bed Reactormentioning

confidence: 89%

Performances of sequential denitrification and partial nitrification process for treatment of landfill leachate

Duyar¹,

Akgül²,

Civelekoğlu³

et al. 2021

Pamukkale J Eng Sci

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This study aims at investigating the sequential denitrification and the partial nitrification performance of anoxic moving bed reactor (AnoxMBBR)-aerobic sequencing batch reactor (AeSBR) to remove ammonium-nitrogen from landfill leachate (LFL). For this purpose, AnoxMBBR and AeSBR were set-up and operated at a cycle time of 48-h. The both reactor performances were evaluated by chemical oxygen demand (COD), dissolved organic carbon (DOC), inorganic carbon (IC), ammonium (NH4 + ), nitrite (NO2 -), nitrate (NO3 -), total nitrogen (TN), color (Pt-Co and RES) and pH parameters. Additionally, the AeSBR performance was evaluated in terms of free ammonium (FA) and free nitrous acid (FNA) concentrations. In the sequential system, total removal efficiency of COD and ammonium was about 75% and 65%, respectively. In AnoxMBBR, also, NO3 -removal efficiency was about 55%. The partial nitrification was successfully occurred in AeSBR and the nitrite accumulation at 24-h and 48-h was about 1630.16 and 1702.92 mg/L, respectively. The results of this study suggest that use of sequential denitrification/partial nitrification is an effective way to remove COD and ammonium from raw LFL However, additional treatment methods to this sequential system can be applied as pretreatment and/or post treatment for achieving the desired water quality because effluent TN and COD values are still not meet with the discharge standards of 40 mg N/L and 600 mg COD/L. Bu çalışma, çöp sızıntı sularından amonyum-azotun giderimi için ardışık anoksik hareketli yatak biofilm (AnoxHYBR) ve aerobik ardışık kesikli (AeAKR) reaktörün performansını araştırmayı amaçlamaktadır. Bu amaç için, AnoxHYBR ve AeAKR 48 sa.'lik döngü süresinde işletilmiştir. Her iki reaktör performansı kimyasal oksijen ihtiyacı (KOİ), çözünmüş organik karbon (ÇOK), inorganik karbon (İK), amonyumtoplam azot (TA) renk (Pt-Co ve RES) ve pH parametreleri ile değerlendirilmiştir. Ek olarak, AeAKR performansı serbest amonyum (SA) ve serbest nitröz asit (SNA) konsantrasyonları açısından değerlendirilmiştir. Ardışık sistemdekitoplam KOİ ve amonyumun giderim verimi sırasıyla %75 ve %65, AnoxHYBR'de NO3 -giderim verimi yaklaşık %55 olarak elde edilmiştir. AeAKR'de başarılı bir kısmi nitrifikasyon prosesi gerçekleştirilerek 24 sa. ve 48 sa.'lik hidrolik bekletme süresinde sırasıyla yaklaşık 1630.16 ve 1702.92 mg/L nitrit birikimi gözlemlenmiştir. Bu çalışma, ardışık denitrifikasyon/kısmi nitrifikasyon kullanımının, ham çöp sızıntı suyundan KOİ ve amonyumun giderimi için etkili bir yol olduğunu göstermektedir. Ancak, deşarj standartlarına uygun çıkış su kalitesini elde etmek için ön ve/veya son arıtım olarak ilave arıtma yöntemleri uygulanması önerilmektedir.

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“…In this study, the triphenyl tetrazolium chloride (TTC)-DHA test was used to compare differences in the microbial activity of the groundwater before and after MNB or CB aeration, respectively. The test of DHA was done according to the research work of Wang et al (2017).…”

Section: Discussionmentioning

confidence: 99%

A comparative study of removal efficiency of organic contaminant in landfill leachate-contaminated groundwater under micro-nano-bubble and common bubble aeration

Bai

Liu

Zhan

et al. 2022

Environ Sci Pollut Res

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Land ll leachate contaminated groundwater is widespread all over the world. In order to study the organic contaminant removal e ciency of land ll leachate contaminated groundwater under oxygen micro-nanobubble (MNB) aeration, a series of lab-scale experiments of oxygen MNB aeration as well as common bubble (CB) aeration were conducted. On the one hand, the difference of mass transfer, microbial activity enhancement and contaminant removal e ciency between MNB and CB aeration were estimated. On the other hand, the composition variations of dissolved organic matter (DOM) in groundwater treated by MNB or CB aeration were characterized by ultraviolet-visible (UV-VIS) absorption spectrum and uorescence excitation-emission matrix (EEM). The test results showed that the oxygen utilization e ciency and volumetric oxygen transfer coe cient of MNB aeration were 10 and 50 times that of oxygen CB aeration, respectively. On the 30th day after MNB aeration, the dehydrogenase activity (DHA) of groundwater increased by 101.25%. Compared with CB aeration, the chemical oxygen demand (COD), 5-day biochemical oxygen demand (BOD 5 ) and ammonia nitrogen removal e ciency under MNB aeration increased by 29.72%, 13.43% and 138.59%, respectively. With the biodegradation effect of MNB aeration, a large number of protein-like and soluble microbial by-product substances were degraded, and humic and fulvic acid-like substances were degraded to a certain level. Oxygen MNB aeration played a chemical oxidation effect while enhancing the biodegradation of groundwater, and it was an energy-e cient land ll leachate contaminated groundwater treatment method.

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Long-term effects of nickel oxide nanoparticles on performance, microbial enzymatic activity, and microbial community of a sequencing batch reactor

Cited by 26 publications

References 35 publications

Sequencing batch reactor technology for landfill leachate treatment: A state-of-the-art review

Sequencing batch reactor technology for landfill leachate treatment: A state-of-the-art review

Performances of sequential denitrification and partial nitrification process for treatment of landfill leachate

A comparative study of removal efficiency of organic contaminant in landfill leachate-contaminated groundwater under micro-nano-bubble and common bubble aeration

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