Bioavailability of dissolved organic matter in biogas slurry enhanced by catalytic ozonation combined with membrane separation

Gu, Leyi; Tang, Xinyu; Sun, Ying; Kou, Huijuan

doi:10.1016/j.ecoenv.2020.110547

Cited by 9 publications

(6 citation statements)

References 50 publications

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“…The use of catalytic ozonation process before or after the membrane filtration is rather seldom applied. Only very few studies have been found to investigate such systems [63][64][65]. Usually, the hybrid catalytic ozonation-membrane filtration system is applied by the 3rd mode, in which the oxidation and filtration processes are carried out simultaneously [7].…”

Section: Catalytic Ozonationmentioning

confidence: 99%

Catalytic Ozonation and Membrane Contactors—A Review Concerning Fouling Occurrence and Pollutant Removal

Psaltou

Zouboulis

2020

Water

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Membrane filtration has been widely used in water and wastewater treatment. However, this process is not very effective for the removal of refractory organic compounds (e.g., of pharmaceutical origin). Coupling membrane filtration with ozonation (or other Advanced Oxidation Methods) can enhance the degradation of these compounds and, subsequently, the incidence of membrane fouling (i.e., the major problem of membrane uses) would be also limited. Ozonation is an efficient oxidative process, although ozone is considered to be a rather selective oxidant agent and sometimes it presents quite low mineralization rates. An improvement of this advanced oxidation process is catalytic ozonation, which can decrease the by-product formation via the acceleration of hydroxyl radicals production. The hydroxyl radicals are unselective oxidative species, presenting high reaction constants with organic compounds. An efficient way to couple membrane filtration with catalytic ozonation is the deposition of an appropriate solid catalyst onto the membrane surface. However, it must be noted that only metal oxides have been used as catalysts in this process, while the membrane material can be of either polymeric or ceramic origin. The relevant studies regarding the application of polymeric membranes are rather scarce, because only a few polymeric materials can be ozone-resistant and the deposition of metal oxides on their surface presents several difficulties (e.g., affinity etc.). The respective literature about catalytic membrane ozonation is quite limited; however, some studies have been performed concerning membrane fouling and the degradation of micropollutants, which will be presented in this review. From the relevant results it seems that this hybrid process can be an efficient technology both for the reduction of fouling occurrence as well as of enhancement of micropollutant removal, when compared to the application of single filtration or ozonation.

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Section: Catalytic Ozonationmentioning

confidence: 99%

Catalytic Ozonation and Membrane Contactors—A Review Concerning Fouling Occurrence and Pollutant Removal

Psaltou

Zouboulis

2020

Water

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“…Biogas slurry is rich in ammonium ions (NH 4 + ), bicarbonate ions (HCO 3 − ), and soluble organic matter such as humic acid (HA) [ 30 , 31 , 33 ]. The content of HA in biogas slurry was measured based on COD concentration.…”

Section: Resultsmentioning

confidence: 99%

Preliminary Study on the Preparation of Conductive Nanosized Calcium Carbonate Utilizing Biogas Slurry by a Synchronous Double Decomposition Coating Method

et al. 2023

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Nanosized calcium carbonate (NCC) plays a vital role in the rubber and plastic fields as a filler, but it cannot resolve the electrostatic problem. Humic-acid-based NCC (HA-NCC) was accidentally discovered in the reaction between biogas slurry and calcium chloride (CaCl2), based on nutrient recovery and gradient treatment technology to solve the biogas slurry problem. A preliminary study on the preparation of conductive nanosized calcium carbonate (CNCC) from the HA-NCC was implemented. Meanwhile, a synchronous double decomposition coating method was proposed to properly explain the formation of HA-NCC in the biogas slurry. The CNCC was further obtained through drying and carbonizing the HA-NCC sample. The morphology of CNCC was a square shape with aggregation, and its crystals were calcite. The C content of CNCC was 5% higher than that of the normal CaCO3, implying a synchronous coating effect of soluble HA in biogas slurry on NCC. The weight loss of CNCC was about 2.5% at 630 °C, explaining why the HA-NCC remained black at 550 °C for 4 h. The CNCC was partly ordered and graphitized. The resistivity of the CNCC reached 2.62 × 106 Ω·cm. It could be used as a conductive powder. In view of the favorable characteristics described above, CNCC would be expected to be a filler and antistatic agent for plastics and rubbers to enhance the tensile and bending resistance of polymer materials, while eliminating electrostatic hazards. The results are also of great significance for developing high-end products to realize resource utilization of biogas slurry.

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“…In recent decades, signicant research efforts have been devoted to developing treatments for refractory organic pollutants. 21,22 A range of techniques has been explored for their removal, including adsorption, 23,24 biological treatment processes, [25][26][27] membrane separation, 28,29 catalysis, 30,31 and advanced oxidation processes. 32,33 Notably, catalytic oxidation processes have made considerable progress in treating refractory organics.…”

Section: Xiaoyi Huangmentioning

confidence: 99%

Recent developments in synthesis of attapulgite composite materials for refractory organic wastewater treatment: a review

Zhang,

Huang,

Qiao

et al. 2024

RSC Adv.

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Bioavailability of dissolved organic matter in biogas slurry enhanced by catalytic ozonation combined with membrane separation

Cited by 9 publications

References 50 publications

Catalytic Ozonation and Membrane Contactors—A Review Concerning Fouling Occurrence and Pollutant Removal

Catalytic Ozonation and Membrane Contactors—A Review Concerning Fouling Occurrence and Pollutant Removal

Preliminary Study on the Preparation of Conductive Nanosized Calcium Carbonate Utilizing Biogas Slurry by a Synchronous Double Decomposition Coating Method

Recent developments in synthesis of attapulgite composite materials for refractory organic wastewater treatment: a review

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