Enhanced biodegradation of coal gasification wastewater with anaerobic biofilm on polyurethane (PU), powdered activated carbon (PAC), and biochar

Shi, Jingxin; Han, Yuxing; Xu, Chunjian; Han, Hongjun

doi:10.1016/j.biortech.2019.121487

Cited by 52 publications

(10 citation statements)

References 35 publications

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“…For example, Shi et al . reported that polyurethane performed an optimal degradation efficiency compared to biochar and powdered activated carbon 38 . This may be due to porosity and internal structure.…”

Section: Resultsmentioning

confidence: 96%

“…For example, Shi et al reported that polyurethane performed an optimal degradation efficiency compared to biochar and powdered activated carbon. 38 This may be due to porosity and internal structure. Figure 3 shows images of polyurethane foam and loofah sponge, where the inner pores of loofah sponge face biodegradation and biological fouling.…”

Section: Synthetic Biofilm Carriersmentioning

confidence: 99%

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Experimental investigation of biofilm carriers of varying shapes, sizes, and materials for wastewater treatment in fixed bed biofilm reactor: a qualitative study of biocarrier performance

Al‐Amshawee

Yunus

Alalwan

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Biofilm carriers were introduced in the early 1990s mainly to abate chemical oxygen demand (COD). However, studies have continued investigating few biocarriers repeatedly, without studying a large number of carriers in a single study under similar conditions. RESULTS The current study investigated the performance of nine synthetic and eight natural biofilm carriers for 7 days of palm oil mill effluent (POME) treatment in terms of COD removal. A fixed bed biofilm reactor (FBBR) was 100% packed with biocarriers and operated at 35 °C. Performance based on the 7th day COD removal could be ranked in the following order: green ammonia absorption stone (91%), K1 micro (88%), coral sand (87.8%), volcanic stone (86.6%), Micro Media (85.5%), 1.6 cm BioBall (85%), pebble (82.4%), porous ceramic ring (82.3), K1 (82.1%), non‐porous ceramic ring (80.9%), brown ammonia absorption stone (78.6%), biological filter (77.7%), Ultra Media (76.8%), blue media (69.3%), 3.0 cm BioBall (68.8%), 2.5 cm BioBall (66.5%), and loofah sponge (63%). CONCLUSION The smallest carrier, K1 micro, yielded the highest COD removal (88%) on day 7 among the other synthetic carriers, while green ammonia absorption stones provided the highest quality effluent from day 1 (3565 mg COD L−1) to day 7 (780 mg COD L−1) and delivered the shortest start‐up compared with all natural and synthetic carriers. The discussion revealed that all carrier functionalities (i.e., scale, shape, surface pores, roughness, material, surface area, porosity, and durability) play a key role in deciding carrier quality. The current study also introduced ‘carrier efficiency limit’, which refers to the carrier's capacity to entrap biomass and immobilize microorganisms. © 2022 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 96%

Section: Synthetic Biofilm Carriersmentioning

confidence: 99%

Experimental investigation of biofilm carriers of varying shapes, sizes, and materials for wastewater treatment in fixed bed biofilm reactor: a qualitative study of biocarrier performance

Al‐Amshawee

Yunus

Alalwan

et al. 2022

J of Chemical Tech & Biotech

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“…However, massive PU production and its utilization in several products that wear out over time or are regularly replaced for better versions (like beds, shoes, cars, or furniture) contribute to a high accumulation of post‐consumer waste 9 . PU is a synthetic polymer consisting of many interconnected pores and various surface‐active groups 10 . The presence of a support material matrix in PU, with its complex network formations of voids, contributes to >95% porosity and a high specific surface area (2400 m 2 m −3 ) 7 .…”

Section: Introductionmentioning

confidence: 99%

Synergistic effects of powdered activated carbon (PAC) during initial biofilm formation of the methanogenic consortium on polyurethane foam

Hudayah

Suksong

Kongduan

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND: In the unfavorable conditions of anaerobic digestion systems, the attached or immobilized microbial communities used as biofilm are more resistant to being washed out than the suspended biomass. The biofilm formation was determined by the carrier characteristics, considering their physicochemical properties and high availability. This study presented an approach for improving the use of polyurethane (PU) foam as a biofilm carrier for methanogenic consortium. RESULTS:The effect of powdered activated carbon (PAC) on the reactor performance and biofilm formation was apparent during days 0-30. The average chemical oxygen demand (COD) removal, methane (CH 4 ) composition, and CH 4 yield of PACsupplemented reactor (R2) in this period were 71.40%, 82.0%, and 0.3 L CH 4 g −1 COD removed, respectively; these values were higher than those of the control reactor (R1). In addition, a greater amount of biomass was observed on the PU foam of R2 (1.47 g VSS), indicating a higher biofilm formation. Scanning electron microscopy (SEM) analysis revealed that microbial biofilm on the PAC-supplemented PU was also denser than that on the control PU. In addition, fluorescence in situ hybridization (FISH) detected layers of Methanosarcinales and Smithella sp.CONCLUSION: This study demonstrated that PAC supplementation had synergistic effects during initial biofilm formation of the methanogenic consortium by accelerating microbial attachment, preserving biofilm structure, and enhancing methanogenic activity.

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“…Therefore, reasonable selection in biocarriers is important. A large specific surface area and good compatibility of carrier material are the two crucial bases for biocarrier evaluation [ 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Innovative Coating–Etching Method of Biocarrier Fabrication for Treating Wastewater with a Low C/N Ratio

Zhang

Lei

et al. 2022

Polymers

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A novel method was used to fabricate the bio-carrier with both a high specific surface area and good compatibility. The results of monitoring the growth of biofilms at a low C/N ratio (0.83) showed that resulting carrier-PLA-cavity offered certain advantages for biofilm growth by providing an appropriate microenvironment for bacterial growth in wastewater treatment. The biofilm on carrier-PLA-cavity grew and updated faster than the naked-carrier. The biomass and thickness of biofilms growing on carrier-PLA-cavity were 10 kg/m3 and 500 μm, respectively. From the wastewater tests, 90% of the total nitrogen was removed via simultaneous nitrification and denitrification (SND) by the biofilm biomass attached to carrier-PLA-cavity, compared to 68% for the naked-carrier. The COD removal efficiency values of the carrier-PLA-cavity and naked-carrier were 94% and 86%, respectively. The microbial community analysis of carrier biofilms showed that Halomonas was the most abundant genus, and heterotrophic nitrification and denitrification were responsible for nitrogen removal in both reactors. Notably, this method does not require any complicated equipment or structural design. This novel method might be a promising strategy for fabricating biocarriers for treating wastewater with a low C/N ratio.

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Enhanced biodegradation of coal gasification wastewater with anaerobic biofilm on polyurethane (PU), powdered activated carbon (PAC), and biochar

Cited by 52 publications

References 35 publications

Experimental investigation of biofilm carriers of varying shapes, sizes, and materials for wastewater treatment in fixed bed biofilm reactor: a qualitative study of biocarrier performance

Experimental investigation of biofilm carriers of varying shapes, sizes, and materials for wastewater treatment in fixed bed biofilm reactor: a qualitative study of biocarrier performance

Synergistic effects of powdered activated carbon (PAC) during initial biofilm formation of the methanogenic consortium on polyurethane foam

Innovative Coating–Etching Method of Biocarrier Fabrication for Treating Wastewater with a Low C/N Ratio

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