Simultaneous nitrogen removal and phosphorus recovery using an anammox expanded reactor operated at 25 °C

Ma, Haiyuan; Xue, Yifeng; Zhang, Tracy; Kobayashi, Takuro; Kubota, Kengo; Li, Yu You

doi:10.1016/j.watres.2020.115510

Cited by 67 publications

(25 citation statements)

References 33 publications

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“…The authors also noted the disadvantages of biological sewage water treatment [7,8], that the use of activated sludge gives high sediment production and low efficiency of removal of many organic and inorganic pollutants. In the article [8,18], studies have been conducted that indicate that during biological sewage water treatment, phosphorus remains intact and needs further treatment. In [8,19], a comparative evaluation of the reagents currently used for the extraction of phosphorus is given.…”

Section: Methodsmentioning

confidence: 99%

Retechnologization of biological sewage water treatment facilities using mathematical modelling

2021

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The efficiency of sewage treatment plants is an urgent problem of the designed and operating stations. In modern conditions, efficiency is understood as the operation of facilities in which operating costs are minimized, facilities provide standard cleaning, and the company implements measures to modernize and improve energy efficiency and trouble-free operation. The article deals with the comparative analysis and selection of the most optimal scheme of biological sewage water treatment of existing sewage water treatment plants. The indicators of the efficiency of functioning and permissible loads on treatment facilities in the design of aeration tanks for biological sewage water treatment are determined. The results served as the basis for the creation of a mathematical model, with the help of which it is possible to calculate the parameters of the biological treatment system and optimize the process of biological sewage water treatment at existing treatment facilities. Mathematical modeling allows you to reduce the cost of designing and operating treatment facilities, to guarantee the degree of treatment in accordance with the requirements and standards for the discharge of treated sewage water into a reservoir for fisheries purposes.

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Section: Methodsmentioning

confidence: 99%

Retechnologization of biological sewage water treatment facilities using mathematical modelling

2021

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“…It was speculated that metal ions could form metal precipitates which could become the nucleus for bacteria to attach to form granules with a similar mechanism for biofilm growth. This theory seems to be partially supported by the phenomenon that inorganic precipitates were mostly found in the core of granules [11,12]. However, so far, there are no reports about the comparison between the newly formed granules and mature granules regarding the spatial distribution of inorganic precipitates to fully validate biofilm growth theory.…”

Section: Introductionmentioning

confidence: 93%

Hydroxyapatite Precipitation and Accumulation in Granules and Its Effects on Activity and Stability of Partial Nitrifying Granules at Moderate and High Temperatures

Liu

Cinquepalmi

2021

Processes

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Precipitation and accumulation of calcium phosphate in granular sludge has attracted research attention recently for phosphate removal and recovery from wastewater. This study investigated calcium phosphate accumulation from granulation stage to steady state by forming heterotrophic granules at different COD/N ratios at 21 and 32 °C, respectively, followed by the transformation of heterotrophic granules to partial nitrifying granules. It was found that mature granules accumulated around 60–80% minerals in granules, much higher than young granules with only around 30% ash contents. In addition, high temperature promoted co-precipitation of hydroxyapatite and calcite in granules with more calcite than hydroxyapatite and only 4.1% P content, while mainly hydroxyapatite was accumulated at the moderate temperature with 7.7% P content. The accumulation of minerals in granules at the high temperature with 75–80% ash content also led to the disintegration and instability of granules. Specific ammonium oxidation rates were reduced, as well, from day 58 to day 121 at both temperatures due to increased mineral contents. These results are meaningful to control or manipulate granular sludge for phosphorus removal and recovery by forming and accumulating hydroxyapatite in granules, as well as for the maintenance of microbial activities of granules.

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“…The combination of denitrification PN, and anammox processes (DN-PN/A) in a self-circulating integrated plant is a promising and efficient process to remove nitrogen pollutants from wastewater (Yan et al, 2020). The primary microorganisms involved in the process are AOB, AnAOB, and denitrifying bacteria (Du et al, 2021) In principle, the DN-PN/A process can remove 100% of ammonia nitrogen, but it is difficult to create a balance between the growth of heterotrophic microorganisms and autotrophic microorganisms (AOB, AnAOB, and other microorganisms) in one integrated reactor (Ma et al, 2020). Thus, research needs to be conducted to develop or engineer optimized DN-PN/A microbiota (Jiang et al, 2021).…”

Section: The Partial Denitrification Process Used For Nitrogen Removalmentioning

confidence: 99%

Advances in Studies on Microbiota Involved in Nitrogen Removal Processes and Their Applications in Wastewater Treatment

et al. 2021

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The discharge of excess nitrogenous pollutants in rivers or other water bodies often leads to serious ecological problems and results in the collapse of aquatic ecosystems. Nitrogenous pollutants are often derived from the inefficient treatment of industrial wastewater. The biological treatment of industrial wastewater for the removal of nitrogen pollution is a green and efficient strategy. In the initial stage of the nitrogen removal process, the nitrogenous pollutants are converted to ammonia. Traditionally, nitrification and denitrification processes have been used for nitrogen removal in industrial wastewater; while currently, more efficient processes, such as simultaneous nitrification-denitrification, partial nitrification-anammox, and partial denitrification-anammox processes, are used. The microorganisms participating in nitrogen pollutant removal processes are diverse, but information about them is limited. In this review, we summarize the microbiota participating in nitrogen removal processes, their pathways, and associated functional genes. We have also discussed the design of efficient industrial wastewater treatment processes for the removal of nitrogenous pollutants and the application of microbiome engineering technology and synthetic biology strategies in the modulation of the nitrogen removal process. This review thus provides insights that would help in improving the efficiency of nitrogen pollutant removal from industrial wastewater.

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Simultaneous nitrogen removal and phosphorus recovery using an anammox expanded reactor operated at 25 °C

Cited by 67 publications

References 33 publications

Retechnologization of biological sewage water treatment facilities using mathematical modelling

Retechnologization of biological sewage water treatment facilities using mathematical modelling

Hydroxyapatite Precipitation and Accumulation in Granules and Its Effects on Activity and Stability of Partial Nitrifying Granules at Moderate and High Temperatures

Advances in Studies on Microbiota Involved in Nitrogen Removal Processes and Their Applications in Wastewater Treatment

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