Biological Reduction of Organic Matter in Buji River Sediment (Shenzhen, China) with Artificial Oxygenation

Che, Lin; Jin, Wei; Zhou, Xu; Cao, Chenbo; Han, Wei; Qin, Changlei; Tu, Renjie; Chen, Yidi; Feng, Xiaochi; Wang, Qilin

doi:10.3390/w12123592

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…Rainy The measured pH values ranged between 7.0 and 7.7 during the campaigns, which shows that they are slightly basic (Table 3). As watercourses receive untreated domestic wastewater, lower pH values were expected due to the anaerobic degradation of organic matter (Che et al, 2020). Thus, as the pH values ranged from neutral to slightly basic, it may be indicative of the contribution of industrial wastewater in the region (Bisimwa et al, 2022).…”

Section: Dry Seasonmentioning

confidence: 99%

Water quality modeling in the Paraibuna River in Juiz de Fora/MG: diagnosis and prognosis

Dutra

Fia

Ribeiro

2022

Rev. Bras. Ciênc. Ambient.

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To support the implementation of instruments of the National Water Resources Policy, as well as the new legal framework for basic sanitation, the environmental assessment of water courses becomes important to guide the planning, monitoring and management of a watershed. Thus, this research aims to contribute to the creation of information structures about the Paraibuna River and its water basin in the central and more urbanized region of Juiz de Fora/MG. The QUAL2K model was used considering two different hydrological periods. The study considered water quality data for the following variables: dissolved oxygen, biochemical oxygen demand, temperature, electrical conductivity and pH. The flow rates in the Paraibuna River and its tributaries were quantified using an Acoustic Doppler Current Profile (ADCP) and a hydrometric windmill. With the calibrated model, future water quality scenarios were simulated for the moment when the new sewage treatment plants are operating at maximum capacity, in accordance with the Juiz de Fora’s Municipal Plan for Basic Sanitation Service. The results show that the Paraibuna River, in the central section of Juiz de Fora, provided data with reduced water quality, mainly in the dry season, leading us to conclude that the flow had a direct influence on the water quality. As for the simulated scenarios, we reached the conclusion that the best result obtained for the sewage treatment of the Paraibuna River will be achieved when the treatment conditions of scenario 3 are applied. This scenario includes the Wastewater Treatment Plants of União Indústria, Santa Luzia, and the renovation of the Wastewater Treatment Plant of Barbosa Laje, with an expected reduction of 90% of the polluting load in the streams covered by the present work, and a reduction of 50% of the organic load upstream of the section under study.

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Section: Dry Seasonmentioning

confidence: 99%

Water quality modeling in the Paraibuna River in Juiz de Fora/MG: diagnosis and prognosis

Dutra

Fia

Ribeiro

2022

Rev. Bras. Ciênc. Ambient.

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“…Low flow rates also reduce the risk of producing volatile organic vapors and migrating of the organic pollutants [8]. Field demonstrations of the method in polluted river sediments have proven the technique's effectiveness in stimulating the aerobic biodegradation rates without affecting the overlying water quality [98].…”

Section: Pure Oxygen Injectionmentioning

confidence: 99%

In Situ Aerobic Bioremediation of Sediments Polluted with Petroleum Hydrocarbons: A Critical Review

Fragkou

Antoniou

Daliakopoulos

et al. 2021

JMSE

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Oil pollution has been a worldwide concern especially in environments where treatment is quite difficult to apply. Marine polluted sediments, in particular, constitute one of the most recalcitrant environments for bioremediation and are often the final repository of petroleum contaminants, as a result of runoff and deposition. Aerobic hydrocarbon degraders present in the sediments are tackling the pollution under oxygen-limited or oxygen-depleted conditions. Research has focused on new ways to enhance bioremediation under anoxic conditions, however aerobic bioremediation is faster, and hence more effort should be made to sustain oxygen concentration levels. In this review, the different bioremediation techniques used for the decontamination of marine sediments are briefly discussed, and focus is primarily given to the different oxygenation methods used for enhancing aerobic bioremediation and the aeration methods that are suitable for in situ application, as well as state of the art technologies that make in situ aeration an appealing approach. Based on the technologies analyzed, suggestions are made for sediment bioremediation techniques in different marine environments.

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“…Biological methods are often used to deal with water pollution problems [1,2]. As the mainstream biological method, the activated sludge method is often used in the treatment of urban wastewater because of its low price, good treatment effect, and short residence time [3].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Combined Utilization of Ultrasonic/Hydrogen Peroxide on Excess Sludge Destruction

Yuan

Zhou

Jin

et al. 2021

Water

Self Cite

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Excess sludge reduction has been a research hotspot for a long time. Ultrasonic treatment of excess sludge was an efficient and green pretreatment method, and also can be combined with the addition of oxidants. To improve the effect of ultrasound treatment on sludge destruction, hydrogen peroxide (H2O2) was added to examine the combined results in the current study. The effects of the ultrasound/hydrogen peroxide system on the release of sludge organic matter during the destruction process were studied. Single-factor experiments were carried out to determine the optimal operating conditions. With the initial pH of 11.0, H2O2 concentration of 0.5 mmol/L, initial sludge concentration of 17 g/L, and 15 min ultrasonic treatment, the maximum soluble chemical oxygen demand (ΔSCOD) in the sludge supernatant after destruction was achieved at 3662.78 ± 239.21 mg/L, with a disintegration degree of 28.61 ± 2.14%, sludge reduction rate of 19.47 ± 0.82%, and the change of mixture sludge concentration (ΔMLSS) of 3.31 ± 0.06 g/L. Meanwhile, the release of nitrogen and phosphorus were greatly improved. Under the optimal conditions, the release of total nitrogen (TN), ammonia nitrogen (NH3-N) and total phosphorus (TP) were 282.30 ± 24.06 mg/L, 25.68 ± 2.09 mg/L, and 105.69 ± 7.84 mg/L, respectively. The current work had provided solid evidence showing the addition of hydrogen peroxide can effectively strengthen the treatment effects of ultrasound on sludge destruction.

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Biological Reduction of Organic Matter in Buji River Sediment (Shenzhen, China) with Artificial Oxygenation

Cited by 7 publications

References 40 publications

Water quality modeling in the Paraibuna River in Juiz de Fora/MG: diagnosis and prognosis

Water quality modeling in the Paraibuna River in Juiz de Fora/MG: diagnosis and prognosis

In Situ Aerobic Bioremediation of Sediments Polluted with Petroleum Hydrocarbons: A Critical Review

Effects of the Combined Utilization of Ultrasonic/Hydrogen Peroxide on Excess Sludge Destruction

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