Intensive Biological Process Based on SBR Reactor for Industrial Wastewater Treatment

Nicolau, Margareta; Patroescu, Viorel; Cosma, Cristiana; Dinu, Laurentiu Razvan; Bumbac, Costel; Constantin, Lucian Alexandru

doi:10.37358/rc.08.10.1978

Cited by 2 publications

(3 citation statements)

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“…The biological treatment stage of this plant is facilitated using two distinct basins: one for the development of nitrification and the other for the denitrification processes. The wastewater from the locality is collected through a network of canals with a total length of over 150 km [11,19]. Figure 6 shows the change in biochemical oxygen consumption (BOD5) of the treatment plant of city B over 24 h following a 5 day period in the biological stage.…”

Section: Resultsmentioning

confidence: 99%

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Simulation of Wastewater Depolution Processes by Advanced Biological Methods

Mirel¹,

Florescu²

2020

Rev. Chim.

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This paper presents the results from a study which simulates wastewater depollution processes using advanced biological methods. The experimental research was performed in a static biological reactor, equipped with an air compressor and an agitator / mixer. Synthetic wastewater, prepared with the addition of glucose, was fed into the reactor. The wastewater was subjected to alternating cycles of aeration and slow mixing, for consecutive 3 h intervals within the reactor to ensure the necessary conditions for the reduction of nitrogen based organic compounds within the wastewater. In the successive aeration processes, aerobic / nitrifying microorganisms which developed within the reactor, facilitated the decomposition of organic substances into nitrites and then into nitrates. By stopping aeration and starting the slow mixing cycle the anaerobic / denitrifying microorganisms growing in the reactor consume the necessary oxygen from nitrates and release free nitrogen into the atmosphere, thus completing the process of advanced depollution. Therefore, the experimental procedure highlights the existence of two distinct phases in the development of the depollution process. In the first phase, the biological process is initiated using glucose in order to promote the growth of the bacterial flora. In the second phase (the regime phase), the reduction of mineral and organic pollutants from the wastewater is ensured. The activity of microorganisms in the biological reactor can be further supported by the recirculation of activated sludge retained in the secondary decanter. The proposed technology offers a fast, safe and relatively inexpensive method for advanced wastewater depollution. Bioreactors of this type are recommended in wastewater treatment schemes in the hearth of rural localities, agro-zootechnical complexes and tourist units with seasonal activities due to their fluctuations in hourly wastewater flow rates. Similar approaches can also be considered for the elimination of ammonium compounds in groundwater polluted with animal manure.

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Section: Resultsmentioning

confidence: 99%

“…The meaning of the other notations follows: WW-wastewater; CW-treated water (clear water); MR-recirculated activated sludge (recirculated mud); EM-excess activated sludge (excess mud); FF-recovery of activated sludge for agricultural purposes (i.e. fertilizer) [1,2,[5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Wastewater Depolution Processes by Advanced Biological Methods

Mirel¹,

Florescu²

2020

Rev. Chim.

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“…Biological wastewater treatment is one of the most efficient solutions for increased loads reduction and the varying compounds and charges in water requires continuous research on improved processes (Nicolau et al, 2008;Tricolici et al, 2014). High strength organic industrial wastewater require pre-treatment prior to their discharge in sewer systems due to the stringent legislation requirement and the potential stress on the downstream wastewater treatment processes.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of a biological products' efficiency for high-load wastewater treatment

Manea

Bumbac

Gaulea³

2019

SIMI 2019

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Prior to discharge, high-loads wastewater needs intensive treatment, that can be carried out by physical, chemical or biological means towards discharge water quality. Extensive research has been carried out to identify solutions with reduced costs and high efficiencies. The paper presents the lab scale performance efficiencies of an innovative biological complex product obtained for the treatment of several samples (municipal wastewater, pig farm wastewater, wastewater from a restaurant’s grease removal tank). The experiments were carried out in laboratory bioreactors, the sample volume considered ranging from 1.5L to 4L depending on the waste water load and the number of simultaneous samples. Each sample was tested in parallel under similar conditions, the only varied parameter being the dissolved oxygen concentration. The results have shown that, under the tested conditions, the product contributes to pollutants degradation, with good efficiency for nitrogen ammonium and Kjeldahl nitrogen removal, managing to partially reduce the organic load. However, after 42 days of experiment, the effluent does not meet the sewage discharge conditions imposed by NTPA 002-H.G.352.

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Intensive Biological Process Based on SBR Reactor for Industrial Wastewater Treatment

Cited by 2 publications

References 0 publications

Simulation of Wastewater Depolution Processes by Advanced Biological Methods

Simulation of Wastewater Depolution Processes by Advanced Biological Methods

Experimental evaluation of a biological products' efficiency for high-load wastewater treatment

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