Online Monitoring of a Sequencing Batch Reactor Treating Domestic Wastewater

Alattabi, Ali W.; Harris, Clare; Alkhaddar, Rafid; Alzeyadi, Ali

doi:10.1016/j.proeng.2017.08.010

Cited by 36 publications

(14 citation statements)

References 13 publications

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“…The monitoring of pH, DO, ORP and temperature for the TSSBR and NOSBR, is shown in the denitrification occurring in the presence of a carbon source in the influent wastewater and anoxic environment [50]. In the react stage, the aerobic condition, the oxidation of COD begins; this is seen by the increased concentration of ammonia in Fig.…”

Section: Ph Do Orp and Temperature Profilesmentioning

confidence: 97%

Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor

Alattabi

Harris

Alkhaddar

et al. 2017

Journal of Water Process Engineering

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Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor http://researchonline.ljmu.ac.uk/id/eprint/7679/ Article LJMU has developed LJMU Research Online for users to access the research output of the University more effectively. (2017) Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor. Journal of Water Process Engineering, 20. pp. 207-216. ISSN 2214-7144 LJMU Research Online Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor Abstract Sludge settleability is considered one of the main drawbacks of sequencing batch reactors. The aim of this study therefore is to improve sludge settleability by introducing a novel, two-stage settling sequencing batch reactor (TSSBR) separated by an anoxic stage. The performance of the TSSBR was compared with that of a normal operating sequencing batch reactor (NOSBR), operating with the same cycle time. The results show a significant improvement in sludge settleability and nitrogen compound removal rates for the TSSBR over the NOSBR. The average removal efficiencies of NH3-N, NO3-N and NO2-N have been improved from 76.6%,86.4% and 87.3% respectively for the NOSBR to 89.2%, 95.2% and 96% respectively for the TSSBR. In addition, the average SVI30 for the NOSBR has been reduced from 42.04 ml/g to 31.17 ml/g for the TSSBR. After three months of operation, there was an overgrowth of filamentous bacteria inside the NOSBR reactor, while the morphological characteristics of the sludge inside the TSSBR reactor indicated a better and homogenous growth of filamentous bacteria.

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Section: Ph Do Orp and Temperature Profilesmentioning

confidence: 97%

Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor

Alattabi

Harris

Alkhaddar

et al. 2017

Journal of Water Process Engineering

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“…where Q air -is the calculated air flow rate under normal conditions, m 3 /h; q dif -nominal value of specific air flow, m 3 /m (pcs. )*h, Table measurement; C st,h -the average value of the saturation concentration of dissolved oxygen at the depth of the aeration tank h (m), mg/dm 3 , at a temperature of 20 0 C; SOTE hqdif -value of the standard efficiency of air oxygen use during aeration; a = 0,8 -water quality coefficient; B = 1 -the coefficient of influence of the sewage liquid on the solubility of oxygen. The throughput capacity of the «aeration tank-secondary sedimentation tank» system according to the calculation of the ATV standard with the actual quality composition of incoming sewage water is given in Table 7.…”

Section: Resultsmentioning

confidence: 99%

“…The main cause of pollution of water bodies with biogenic elements that violate the stability of the biosystem is the discharge of urban and industrial sewage water. Scientists from different countries of the world have been solving the problems of high-quality sewage water treatment to prevent eutrophication of water bodies for many years [1][2][3][4]. At the end of the twentieth century, our country tightened the standards for the discharge of pollutants into water bodies, introduced technologies for deep removal of nitrogen and phosphorus compounds from sewage water based on the recommendations of research organizations.…”

Section: Introductionmentioning

confidence: 99%

“…The biological method of deep removal of biogenic substances from sewage water makes it possible to achieve the total phosphorus content in treated waters of 1.0...1.5 mg/dm 3 , and the total nitrogen content of 8...10 mg/dm 3 (including protein, ammonium, nitrite and nitrate) in real biological treatment facilities. The biological method of phosphorus removal makes it possible to achieve a high quality of phosphorus treatment, but this process is very sensitive to the current quality of sewage water received for treatment and requires highly qualified technologists-operators [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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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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“…As a consequence, it is inappropriate to use soil Eh to estimate conditions of SWISs. Conversely, using on-line oxidation-reduction potential (ORP) to monitor the microenvironment and ensure the conditions of pollutant treatments has been proven to be useful technology for controlling SWISs [7]. ORP obtained helps identify and control removal of biological nutrient and hexavalent chromium [8].…”

Section: Introductionmentioning

confidence: 99%

Do Wet-Dry Ratio and Fe-Mn System Affect Oxidation-Reduction Potential Nonlinearly in the Subsurface Wastewater Infiltration Systems?

Zhang

et al. 2018

IJERPH

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To understand characteristics of on-line oxidation-reduction potential (ORP) in a subsurface wastewater infiltration system (SWIS) under different intermittent influent conditions, ORP among five matrix depths at wet-dry ratios (Rwds) of 2:1, 1:1 and 1:2 with a hydraulic load of 0.10 m3·(m2·d)−1 were monitored. Results showed that the optimal Rwd for the SWIS was 1:1. In that case, ORP at 40 and 65 cm depths changed significantly, by 529 mV and 261 mV, respectively, from the inflow period to the dry period, which was conducive to the recovery of the oxidation environment. It was concluded that ORP varied nonlinearly in strongly aerobic and hypoxic environment. Wastewater was fed into the SWIS at 80 cm and dissolved oxygen diffused at the initial period of one cycle. As a consequence, ORP at 65 cm increased with water content increasing. However, ORP at 40 and 95 cm displayed inverse trends. Moreover, results showed that ORP decreased with Fe2+ and Mn2+ increasing under aerobic conditions (p < 0.05) because Fe2+ and Mn2+ moved with wastewater flow. Effluent met reuse requirements and no clogging was found in the SWIS during the operation.

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Online Monitoring of a Sequencing Batch Reactor Treating Domestic Wastewater

Cited by 36 publications

References 13 publications

Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor

Improving sludge settleability by introducing an innovative, two-stage settling sequencing batch reactor

Retechnologization of biological sewage water treatment facilities using mathematical modelling

Do Wet-Dry Ratio and Fe-Mn System Affect Oxidation-Reduction Potential Nonlinearly in the Subsurface Wastewater Infiltration Systems?

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