Heterotrophic denitrification strategy for marine recirculating aquaculture wastewater treatment using mariculture solid wastes fermentation liquid as carbon source: Optimization of COD/NO3−-N ratio and hydraulic retention time

Gao, Yubo; Guo, Liang; Shao, Mengyu; Hu, Fawen; Wang, Guangce; Zhao, Yangguo; Chen, Jin; She, Zhigang

doi:10.1016/j.biortech.2020.122982

Cited by 40 publications

(17 citation statements)

References 39 publications

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“…Therefore, nitrite concentration will continue to be reduced when nitrate concentration low ( Gan, Zhao & Ye, 2019 ). As a result, the nitrite removal sequence of the six agricultural wastes was the same as that of nitrate, which is similar to the results of Gao et al (2020) . After 181 h, nitrate and nitrite were completely removed, indicating that the six agricultural wastes released sufficient organic matter to achieve complete denitrification.…”

Section: Discussionsupporting

confidence: 81%

“…However, they were lower than the denitrification rate of corncob, which Zhong et al (2019) found to reach 6.25 mg/(L · h). Previous studies have shown that the denitrification rate is not only affected by COD release but is also related to the following factors: (1) iron and manganese release from agricultural waste ( Labbe, Parent & Villemur, 2003 ); (2) the relative proportion of COD from organics easily utilized by microorganisms (such as volatile fatty acids, carbohydrates, and sugars) ( Gao et al, 2020 ); (3) the quality of the inoculated sludge, its reaction conditions, and the characteristics of the wastewater ( Xiong et al, 2019 ). For example, Yang et al (2015) found that although the COD release of rice straw is lower than that of loofah and corncob, it had higher denitrification rates.…”

Section: Discussionmentioning

confidence: 99%

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Effectiveness of agricultural waste in the enhancement of biological denitrification of aquaculture wastewater

Gao

Gong

Zhang

et al. 2022

PeerJ

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Nitrogen pollution in aquaculture wastewater can pose a significant health and environmental risk if not removed before wastewater is discharged. Biological denitrification uses external carbon sources to remove nitrogen from wastewater; however, these carbon sources are often expensive and require significant energy. In this study, we investigated how six types of agricultural waste can be used as solid carbon sources in biological denitrification. Banana stalk (BS), loofah sponge (LS), sorghum stalk (SS), sweet potato stalk (SPS), watermelon skins (WS) and wheat husk (WH) were studied to determine their capacity to release carbon and improve denitrification efficiency. The results of batch experiments showed that all six agricultural wastes had excellent carbon release capacities, with cumulative chemical oxygen demands of 37.74–535.68 mg/g. During the 168-h reaction, the carbon release process followed the second-order kinetic equation and Ritger-Peppas equation, while carbon release occurred via diffusion. The kinetic equation fitting, scanning electron microscopy, and Fourier transform infrared spectroscopy results showed that LS had the lowest cm and the maximum t1/2 values and only suffered a moderate degree of hydrolysis. It also had the lowest pollutant release rate and cumulative chemical oxygen demand, as well as the most efficient removal of total phosphorous (TP) and total nitrogen (TN). Therefore, we concluded that LS has the lowest potential risk of excess carbon release and capacity for long-lasting and stable carbon release. The WS leachate had the highest TN contents, while the SPS leachate had the highest TP content. In the 181-h denitrification reaction, all six agricultural wastes completely removed nitrate and nitrite; however, SS had the highest denitrification rate, followed by LS, WH, BS, SPS, and WS (2.16, 1.35, 1.35, 1.34, 1.34, and 1.01 mg/(L·h), respectively). The denitrification process followed a zero-order and first-order kinetic equation. These results provide theoretical guidance for effectively selecting agricultural waste as a solid carbon source and improving the denitrification efficiency of aquaculture wastewater treatment.

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Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Effectiveness of agricultural waste in the enhancement of biological denitrification of aquaculture wastewater

Gao

Gong

Zhang

et al. 2022

PeerJ

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“…COD, J o u r n a l P r e -p r o o f 10 VSS, NH 4 + -N, and TP were analyzed according to the methods described previously (Guo et al, 2014;Ren et al, 2015). VFAs were detected by GC2010 gas chromatography (Shimadzu, Japan) following the method described in the previous study (Gao et al, 2020b).…”

Section: Methodsmentioning

confidence: 99%

“…Thermophilic bacteria (Bacillus sp. AT07-1) pretreatment method was applied to enhance the hydrolysis of mariculture wastewater as previous study (Gao et al, 2020b).…”

Section: Acidogenic Fermentation Of Mariculture Wastewatermentioning

confidence: 99%

Mariculture wastewater treatment with Bacterial-Algal Coupling System (BACS): Effect of light intensity on microalgal biomass production and nutrient removal

Gao

Guo

Liao

et al. 2021

Environmental Research

Self Cite

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“…was identified only in 5× and 10× cultures. Members of these genera are denitrifiers [35][36][37][38]. Bacteria can suppress microalgal growth by ways such as competition for nutrients, excretion of algicidal matter, and degradation of microalgal cells through direct contact [39].…”

Section: Microbial Community Structurementioning

confidence: 99%

Evaluation of Scenedesmus rubescens for Lipid Production from Swine Wastewater Blended with Municipal Wastewater

2020

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This study examined the feasibility of using non-sterilized swine wastewater for lipid production by an isolated microalga, Scenedesmus rubescens. Different dilution ratios using municipal wastewater as a diluent were tested to determine the suitable levels of microalgal growth in the wastewaters, its nutrient removal, and its lipid production. The highest lipid productivity (8.37 mg/L/d) and NH4+ removal (76.49%) were achieved in swine wastewater that had been diluted to 30 times using municipal wastewater. Various bacteria coexisted in the wastewaters during the cultivation of S. rubescens. These results suggest the practical feasibility of a system to produce lipids from swine wastewater by using microalgae.

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Heterotrophic denitrification strategy for marine recirculating aquaculture wastewater treatment using mariculture solid wastes fermentation liquid as carbon source: Optimization of COD/NO3−-N ratio and hydraulic retention time

Cited by 40 publications

References 39 publications

Effectiveness of agricultural waste in the enhancement of biological denitrification of aquaculture wastewater

Effectiveness of agricultural waste in the enhancement of biological denitrification of aquaculture wastewater

Mariculture wastewater treatment with Bacterial-Algal Coupling System (BACS): Effect of light intensity on microalgal biomass production and nutrient removal

Evaluation of Scenedesmus rubescens for Lipid Production from Swine Wastewater Blended with Municipal Wastewater

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