Potassium permanganate-based advanced oxidation processes for wastewater decontamination and sludge treatment: A review

Wang, Yufen; Zheng, Kaixin; Guo, Haixiao; Tian, Lixin; He, Yanying; Wang, Xiaomin; Zhu, Tingting; Sun, Peizhe; Liu, Yiwen

doi:10.1016/j.cej.2022.139529

Cited by 88 publications

(17 citation statements)

References 121 publications

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“…AOP is a typical chemical regulation method, and the free radicals (reactive oxygen species, ROS) it produces have strong oxidative effects. , The advanced oxidation method destroys the EPS by free radicals, breaks the complex bond between water molecules and organic matter, reduces the hydration energy, dissolves the microbial cell wall, and helps the release of bound water and the removal of micropollutants in the sludge system . In existing research, common oxidants are Fenton’s reagent, persulfate, ozone, permanganate, ferrate, and wet air oxidation techniques.…”

Section: The Methods Of Sludge Conditioning For Dehydrationmentioning

confidence: 99%

Dehydration Performance of Municipal Sludge and Its Dewatering Conditioning Methods: A Review

Jiang

Gao

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Municipal sludge is an inevitable byproduct during the treatment of wastewater, which is produced by sewage treatment plants in urban residential areas, and it contains pathogens, heavy metals, and other pollutants. Municipal sludge is suitable for application in energy utilization because of its high organic content and relatively low toxic matter. The high moisture content of municipal sludge brings huge difficulties to its harmless disposal and resource utilization. At present, the main method used for sludge dehydration is mechanical dewatering. However, the mud cake produced by this method still has a water content of up to 80%, which does not meet the current rigorous requirements. Therefore, the development of deep dehydration technology for sludge is imperative. In this paper, the basic properties and structure of sludge were summarized. As a key component of sludge flocs, extracellular polymeric substance (EPS) has received much attention in sludge dewatering conditioning. Meanwhile, the influencing factors of sludge dewatering were also fully elaborated, including sludge types, sewage hardness, surface charge, size distribution, and sludge viscosity. And the main methods of sludge dewatering treatment were comprehensively included, namely, the physical method, chemical method, biological method, and combined conditioning methods. The advantages and disadvantages of each method are mentioned, and their application situations were analyzed. Furthermore, comment was provided on the conditioning mechanism, adaptability, prospects, and limitations of the techniques for improving sludge dewatering. This systematic review related to sludge dewatering can not only provide reference information for the conditioning method but also benefit the exploitation of efficient and ecofriendly sludge dewatering technology.

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Section: The Methods Of Sludge Conditioning For Dehydrationmentioning

confidence: 99%

Dehydration Performance of Municipal Sludge and Its Dewatering Conditioning Methods: A Review

Jiang

Gao

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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“…Nitrous oxide (N 2 O), with a global warming potential of 310 times than that of carbon dioxide, can contribute to ozone depletion and positive radiative forcing in the stratosphere. − During the biological nitrogen removal process, the emission of even a small fraction of the influent ammonia as N 2 O can lead to a significant increase in carbon emissions at wastewater treatment plants (WWTPs). − Due to a natural deficiency of N 2 O reductase, two major mechanisms in terms of N 2 O production by ammonia-oxidizing bacteria (AOB) have been widely known as the hydroxylamine (NH 2 OH) pathway (ammonia → NH 2 OH → NOH → N 2 O or ammonia → NH 2 OH → NO → N 2 O) and AOB denitrification (nitrite → NO → N 2 O) pathway. − Nitrosyl radical (NOH) and nitric oxide (NO) as the byproducts from the NH 2 OH pathway can decompose chemically and be catalyzed by alternative NO reductases to produce N 2 O, respectively. , The AOB denitrification pathway can be catalyzed by a combined effect of nitrite (NO 2 – ) copper-containing reductase and heme-copper NO reductase . N 2 O produced by AOB through NO 2 – and NO reduction in both pathways are driven by electrons generated from NH 2 OH oxidation.…”

Section: Introductionmentioning

confidence: 99%

Smaller Aerobic Granules Significantly Reduce N₂O Production by Ammonia-Oxidizing Bacteria: Evidences from Biochemical and Isotopic Analyses

Liu,

Zhao

et al. 2023

Environ. Sci. Technol.

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The mitigation of nitrous oxide (N2O) is of primary significance to offset carbon footprints in aerobic granular sludge (AGS) systems. However, a significant knowledge gap still exists regarding the N2O production mechanism and its pathway contribution. To address this issue, the impact of varying granule sizes, dissolved oxygen (DO), and nitrite (NO2 –) levels on N2O production by ammonia-oxidizing bacteria (AOB) during nitrification in AGS systems was comprehensively investigated. Biochemical and isotopic experiments revealed that increasing DO or decreasing NO2 – levels reduced N2O emission factors (by 13.8 or 19.5%) and production rates (by 0.08 or 0.35 mg/g VSS/h) via weakening the role of the AOB denitrification pathway since increasing DO competed for more electrons required for AOB denitrification. Smaller granules (0.5 mm) preferred to diminish N2O production via enhancing the role of NH2OH pathway (i.e., 59.4–100% in the absence of NO2 –), while larger granules (2.0 mm) induced conspicuously higher N2O production via the AOB denitrification pathway (approximately 100% at higher NO2 – levels). Nitrifying AGS systems with a unified size of 0.5 mm achieved 42% N2O footprint reduction compared with the system with mixed sizes (0.5–2.0 mm) under optimal conditions (DO = 3.0 mg-O2/L and NO2 – = 0 mg-N/L).

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“…The discharge of industrial wastewater alone has caused terrible environmental pollutions and serious health problems. 1,2 Among various sources of industrial effluents, wastewater from textile dyeing accounts for a large proportion, and is faced with problem of high toxicity and removing difficulty. 3,4 Reactive dye, a kind of dye which is able to react with the hydroxyl groups of cotton fabric, could provide brilliant shades, various colors and good wet fastness, being significant in cotton fabric coloration.…”

Section: Introductionmentioning

confidence: 99%

“…Energy conservation and emission reduction in industrial field has become a top priority in recent years. The discharge of industrial wastewater alone has caused terrible environmental pollutions and serious health problems 1,2 . Among various sources of industrial effluents, wastewater from textile dyeing accounts for a large proportion, and is faced with problem of high toxicity and removing difficulty 3,4 .…”

Section: Introductionmentioning

confidence: 99%

Clean printing of cotton fabrics using novel environmental‐friendly phthalocyanine‐monoazo reactive dyes

Liu

Han

et al. 2023

Env Prog and Sustain Energy

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Application of reactive dyes with low fixation in textile coloring field has caused discharges of colored wastewater and waste of resources. In this work, to reduce the discharge and improve the utilization, three novel reactive dyes (D1, D2, D3) with high reactivity based on copper phthalocyanine‐azo skeleton were designed and synthesized, and the structures were characterized by UV–vis, FT‐IR, and 1H NMR. All these dyes had large molar extinction coefficients, and they presented violet, brown, and dark‐violet colors. The printing performances on cotton fabrics of the dyes were investigated. Results show that the printing properties of the dyes on fabrics were not obviously affected by alkaline concentration, urea concentration, and steaming time. In addition, the printing process leaded to colorless wastewater, and the fixations on cotton fabrics of D1, D2, and D3 were all close to 100%, illustrating high utilization of the novel dyes. The design and application of this kind of reactive dye could provide a significant approach for reducing the discharge of colored wastewater and saving energy.

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Potassium permanganate-based advanced oxidation processes for wastewater decontamination and sludge treatment: A review

Cited by 88 publications

References 121 publications

Dehydration Performance of Municipal Sludge and Its Dewatering Conditioning Methods: A Review

Dehydration Performance of Municipal Sludge and Its Dewatering Conditioning Methods: A Review

Smaller Aerobic Granules Significantly Reduce N₂O Production by Ammonia-Oxidizing Bacteria: Evidences from Biochemical and Isotopic Analyses

Clean printing of cotton fabrics using novel environmental‐friendly phthalocyanine‐monoazo reactive dyes

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Potassium permanganate-based advanced oxidation processes for wastewater decontamination and sludge treatment: A review

Cited by 88 publications

References 121 publications

Dehydration Performance of Municipal Sludge and Its Dewatering Conditioning Methods: A Review

Dehydration Performance of Municipal Sludge and Its Dewatering Conditioning Methods: A Review

Smaller Aerobic Granules Significantly Reduce N2O Production by Ammonia-Oxidizing Bacteria: Evidences from Biochemical and Isotopic Analyses

Clean printing of cotton fabrics using novel environmental‐friendly phthalocyanine‐monoazo reactive dyes

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Product

Resources

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Smaller Aerobic Granules Significantly Reduce N₂O Production by Ammonia-Oxidizing Bacteria: Evidences from Biochemical and Isotopic Analyses