Combined biologic aerated filter and sulfur/ceramisite autotrophic denitrification for advanced wastewater nitrogen removal at low temperatures

Zhang, Guangming; Du, Fengwei; He, Junguo; Wu, Pan

doi:10.1007/s11783-014-0690-9

Cited by 23 publications

(5 citation statements)

References 24 publications

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“…These findings suggest that the conversion rate of ammonium‐nitrogen is slower in the low‐temperature environment of winter and faster in the high‐temperature environment of summer. In the former, the activities of ammonium bacteria‐associated nitrate reductase and nitrite reductase involved in ammonium‐nitrogen conversion decline, resulting in reduced nitrification and a continuous accumulation of ammonium‐nitrogen (X. Huang et al., 2017; Wan et al., 2014). Both nitrification and denitrification reactions require aerobic conditions, and the water depths at the three study sites, labeled as A, B, and C, are approximately 0.3, 1.8, and 2 m, respectively.…”

Section: Discussionmentioning

confidence: 99%

Seasonal impact of constructed wetlands on nitrogen and phosphorus in sediments of flood control lakes with pollution assessment

Li,

Liu,

Huang

et al. 2024

J of Env Quality

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The primary drivers of eutrophication in lakes following the reduction of external nutrient inputs are the release of N and P from sediments. Constructed wetlands play a pivotal role in ameliorating N, P, and other biogenic element levels. However, the presence of large vegetation in these wetlands also substantially contributes to nutrient accumulation in sediments, a phenomenon influenced by seasonal variations. In this study, a typical constructed wetland was selected as the research site. The research aimed to analyze the forms of N and P in sediments during both summer and winter. Simultaneously, a comprehensive pollution assessment and analysis were conducted within the study area. The findings indicate that elevated summer temperatures, together with the presence of wetland vegetation, promote the release of N through the nitrification process. Additionally, seasonal variations exert a significant impact on the distribution of P storage. Furthermore, the role of constructed wetlands in the absorption and release of N and P is primarily controlled by the influence of organic matter on nitrate‐nitrogen, nitrite‐nitrogen, and available phosphorus, and is also subject to seasonal fluctuations. In summary, under the comprehensive influence of constructed wetlands, vegetation types, and seasons, sediments within the lake generally exhibit a state of mild or moderate pollution. Therefore, targeted measures should be adopted to optimally adjust vegetation types, and human intervention is necessary, involving timely sediment harvesting during the summer to reduce N and P loads, and enhancing sediment adsorption and retention capacity for N and P during the winter.

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Section: Discussionmentioning

confidence: 99%

Seasonal impact of constructed wetlands on nitrogen and phosphorus in sediments of flood control lakes with pollution assessment

Li,

Liu,

Huang

et al. 2024

J of Env Quality

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“…The influent pH was kept at approximately 7.5, but the effluent pH value decreased to only 6.2. Na2CO3 was added as alkalinity [22] to the influent on day 92. The Na2CO3 concentration varied in the experiment from 50 to 200 mg l -1 .…”

Section: High-strength Sewage Treatment Using An Anaerobic Bio-filtermentioning

confidence: 99%

Domestic sewage and secondary effluent treatment using vertical submerged biological filter

Yang

Tong

Song

et al. 2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Biological filter (bio-filter) exhibits a high potential for sustainability because construction and maintenance cost are low. When bio-filters are used as pre-treatment or post-treatment technology, other treat steps in the combined treat process could prevent clogging and get better process stability and performance efficiency. This study considered bio-filters for reducing the amounts of various wastewaters, i.e., high-strength sewage, municipal wastewater and secondary effluent water, using five kinds of media. The results obtained indicate significant improvement in organics removal when influent COD are 1500 mg/L and 2500 mg/L for anaerobic and aerobic biofilters, respectively. Sufficient alkalinity would obviously improve the substrate removal in an anaerobic bio-filter, when treating high-strength wastewater. The performances of bio-filters are adequate for further removal of the residual organic material and nutrient elements for tertiary domestic wastewater treatment.

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“…However, results showed that NOBs were more sensitive than AOBs. Wan et al, (2014c) for nitrogen removal. They revealed that more than 90% of total nitrogen (TN), NH 4+ -N, NO3--N) were removed.…”

Section: Algae Consumption and Nitrate Removal Bymentioning

confidence: 99%

Chemical Waste and Allied Products

Hung

Aziz

Yusoff

et al. 2015

Water Environment Research

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Combined biologic aerated filter and sulfur/ceramisite autotrophic denitrification for advanced wastewater nitrogen removal at low temperatures

Cited by 23 publications

References 24 publications

Seasonal impact of constructed wetlands on nitrogen and phosphorus in sediments of flood control lakes with pollution assessment

Seasonal impact of constructed wetlands on nitrogen and phosphorus in sediments of flood control lakes with pollution assessment

Domestic sewage and secondary effluent treatment using vertical submerged biological filter

Chemical Waste and Allied Products

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