Performance of an oxidation ditch retrofitted with a membrane bioreactor during the start-up

Tiranuntakul, Maneerat; Jegatheesan, Veeriah; Schneider, P.A.; Fracchia, H.L.

doi:10.1016/j.desal.2005.03.043

Cited by 12 publications

(5 citation statements)

References 13 publications

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“…Biotreatment units for wastewater and sludge are treatment units of type 3 (TU3). Biotreatment units for wastewater considered in this article include modified Ludzack–Ettinger (MLE) and oxygen ditch (OxD), which are activated sludge treatment processes. Biotreatment units for sludge include anaerobic digestion unit (AnD) and aerobic digestion unit (AeD).…”

Section: Formulationmentioning

confidence: 99%

“…An oxidation ditch (OxD) is a modified activated sludge treatment process providing anaerobic and aerobic treatment in the same circular basin, which is similar to the treatment unit in a sequential batch reactor. In the main reaction of OxD, the key reactant is converted to other components with a given conversion, which is given by eq .…”

Section: Formulationmentioning

confidence: 99%

“…There are some parameters in eq 14: IC ae and IC an are unit capital cost of aerobic tank and anaerobic tank, respectively; p elec is the price of electricity 32 which is similar to the treatment unit in a sequential batch reactor. In the main reaction of OxD, the key reactant is converted to other components with a given conversion, which is given by eq 12.…”

Section: Formulationmentioning

confidence: 99%

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Optimal Synthesis and Operation of Wastewater Treatment Process with Dynamic Influent

Huang

Grossmann

2017

Ind. Eng. Chem. Res.

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This work addresses the problem of optimal synthesis and operation of wastewater treatment processes considering multiscenario influent streams under different discharge standards and penalty rates of noncompliant emissions. We develop a general disjunctive programming model to address this problem, which is then reformulated as a multiperiod mixed-integer nonlinear programming model using hull reformulation for the disjunctions. To solve the resulting model to global optimality, we propose a Lagrangeanbased decomposition algorithm. Numerical studies verify the effectiveness of the algorithm, and comparison studies provide useful management insights for policy makers.

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Section: Formulationmentioning

confidence: 99%

Section: Formulationmentioning

confidence: 99%

Section: Formulationmentioning

confidence: 99%

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Optimal Synthesis and Operation of Wastewater Treatment Process with Dynamic Influent

Huang

Grossmann

2017

Ind. Eng. Chem. Res.

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“…The TN removal paths in the oxidation ditch process were ammonia stripping, assimilation, and nitrification-denitrification. However, ammonia stripping was assumed to be negligible because the pH of the mixed liquor in the ditch was usually below 7.5 (Peng et al, 2008;Tiranuntakul et al, 2005). The nitrogen mass balances in Table 1 were compared under both aeration modes with identical process parameters such as the 26.…”

Section: Performance Of Step Aeration In Nitrogen Removalmentioning

confidence: 99%

A new step aeration approach towards the improvement of nitrogen removal in a full scale Carrousel oxidation ditch

Jin

Wang

Ngo

et al. 2015

Bioresource Technology

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Two aeration modes, step aeration and point aeration, were used in a full-scale Carrousel oxidation ditch with microporous aeration. The nitrogen removal performance and mechanism were analyzed. With the same total aeration input, both aeration modes demonstrated good nitrification outcomes with the average efficiency in removing NH4(+)-N of more than 98%. However, the average removal efficiencies for total nitrogen were 89.3% and 77.6% under step aeration and point aeration, respectively. The results indicated that an extended aerobic zone followed the aeration zones could affect the proportion of anoxic and oxic zones. The step aeration with larger anoxic zones indicated better TN removal efficiency. More importantly, step aeration provided the suitable environment for both nitrifiers and denitrifiers. The diversity and relative abundance of denitrifying bacteria under the step aeration (1.55%) was higher than that under the point aeration (1.12%), which resulted in an overall higher TN removal efficiency.

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“…And the DPR has the advantages, such as carbon sources that can be used for denitrification and phosphorus uptake, simultaneous removal of nitrogen and phosphorus, less sludge production and aeration energy saving [5,13,15]. OD process is a widely used BNR process, because long hydraulic retention time (HRT) and complete mixing minimize the impact of a shock load, produces less sludge and energy efficient operations result in reduced energy costs [16,17]. Anoxic-anaerobic OD process is combined A 2 O process with OD process, and can removal nitrogen and phosphorus simultaneously.…”

Section: Introductionmentioning

confidence: 99%

The investigation of aeration optimization in a pilot-scale anoxic-anaerobic oxidation ditch for nutrient removal from wastewater

Nengzi¹,

Jiang²,

Li³

et al. 2018

Proceedings of the 2018 7th International Conference on Energy, Environment and Sustainable Development (ICEESD 2018)

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The performance of nitrogen and phosphorus removal in a pilot-scale anoxic-anaerobic oxidation ditch (OD) process was investigated. In order to achieve a high removal efficiency of nitrogen and phosphorus, the aeration was optimized and an anoxic zone was formed in the front of OD reactor, thus the operation condition was changed to anoxic/anaerobic/anoxic/aerobic. Denitrification and DPR was occurred in the formed anoxic zone, while SND was occurred in the back of the OD reactor, and energy costs were reduced as DO in the OD reactor was relatively low.

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Performance of an oxidation ditch retrofitted with a membrane bioreactor during the start-up

Cited by 12 publications

References 13 publications

Optimal Synthesis and Operation of Wastewater Treatment Process with Dynamic Influent

Optimal Synthesis and Operation of Wastewater Treatment Process with Dynamic Influent

A new step aeration approach towards the improvement of nitrogen removal in a full scale Carrousel oxidation ditch

The investigation of aeration optimization in a pilot-scale anoxic-anaerobic oxidation ditch for nutrient removal from wastewater

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