Removal of nitrogen and phosphorus from swine wastewater by the activated sludge units with the intermittent aeration process

Osada, Takashi; Haga, Kiyonori; Harada, Yasuo

doi:10.1016/0043-1354(91)90116-8

Cited by 104 publications

(42 citation statements)

References 12 publications

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“…6 On the other hand, the lack of BCOD during the denitrification step implies a reduction in the nitrogen removal efficiency. 7,8 In this respect, denitrification via nitrite instead of nitrate results in organic carbon savings of up to 40%.…”

Section: Introductionmentioning

confidence: 98%

Batch treatment of liquid fraction of pig slurry by intermittent aeration: process simulation and microbial community analysis

Magrí

Guivernau

Baquerizo

et al. 2009

J of Chemical Tech & Biotech

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BACKGROUND: Manure treatment in intensive livestock farming is required to reduce the risk of negative environmental impacts by nitrogen disposal. Biological removal through intermittent aeration in a single bioreactor is a suitable method for this purpose. The characteristic operation based on the alternation of oxic/anoxic phases confers these systems with certain particularities in terms of process modelling and of understanding the microbial interactions.

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Section: Introductionmentioning

confidence: 98%

Batch treatment of liquid fraction of pig slurry by intermittent aeration: process simulation and microbial community analysis

Magrí

Guivernau

Baquerizo

et al. 2009

J of Chemical Tech & Biotech

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“…This can be used as the energy derived from the hydrolysis of these compounds to apprehend the organic substrates stored as poly-hydroxybutyrate (PHB) and poly-hydroxyvalerate (PHV) used as energy source in aerobic environments. The removal of phosphorus is more efficient in the conditions of alternating aerobic and anaerobic conditions (Osada et al 1991;Van Haandel and Marais 1999). Campos (1989) reported that the contact of the influent with raw sludge also helped in the predominantly anaerobic removal of phosphorus, which did not occur in the present study due to the sedimentation of organic matter in the AET.…”

Section: Total Nitrogen and Total Phosphorusmentioning

confidence: 99%

Characterization of an acidification and equalization tank (AET) operating as a primary treatment of swine liquid effluent

Motteran

Pereira

Campos

2013

Braz. arch. biol. technol.

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“…[Key words: oxidation-reduction potential (ORP), pH, real-time control, sequencing batch reactor (SBR), nitrogen removal, swine wastewater] Animal manure is widely used as a fertilizer in many countries, since animal waste contains nutrients such as nitrogen and phosphorus (1,2). While land application of swine manure may be an economical and easy method to manage waste, this treatment causes many environmental problems such as contamination of groundwater and eutrophication of surface waters (3).…”

mentioning

confidence: 99%

Effectiveness of oxidation-reduction potential and pH as monitoring and control parameters for nitrogen removal in swine wastewater treatment by sequencing batch reactors

Kishida

Kim

Chen

et al. 2003

Journal of Bioscience and Bioengineering

110

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Two bench-scale sequencing batch reactors (SBRs) were operated in a fixed hydraulic retention time study to investigate the effectiveness of oxidation-reduction potential (ORP), pH and dissolved oxygen as parameters for indicating denitrification followed by nitrification in SBRs for swine wastewater treatment. The ORP and pH profiles were monitored and evaluated under different denitrification and nitrification conditions with and without a supplemental carbon source. With a low C/N ratio, and using a suitable C/N ratio adjustment control, ORP and pH could be used as monitoring and control parameters in both the anoxic and oxic phases for practical swine wastewater treatment. High-level accumulation of nitrate was observed without any C/N ratio adjustment. In this case, ORP and pH were not useful for monitoring denitriiication followed by nitrillcation in SBRs. According to our research, with regard to N removal, it would be better to use pH as a parameter during the oxic phase and ORP as a parameter during the anoxic phase. Using a suitable adjustment of a C/N ratio in the influent by adding swine slurry, a high total nitrogen removal efficiency of up to 95.5% was reached. It was found that, in this case, the use of ORP and pH as parameters for real-time control processes was possible in swine wastewater treatment.[Key words: oxidation-reduction potential (ORP), pH, real-time control, sequencing batch reactor (SBR), nitrogen removal, swine wastewater] Animal manure is widely used as a fertilizer in many countries, since animal waste contains nutrients such as nitrogen and phosphorus (1, 2). While land application of swine manure may be an economical and easy method to manage waste, this treatment causes many environmental problems such as contamination of groundwater and eutrophication of surface waters (3). In addition, with the present trend toward raising large herds of livestock in smaller areas, it is becoming difficult to apply all of the waste to cropland (4). Therefore, it is necessary to develop an alternative cost-effective waste treatment system and an enhanced treatment system for nutrient removal.In recent years, real-time control processes using oxidation-reduction potential (ORP), pH and dissolved oxygen (DO) as parameters to control the oxic and anoxic cycles of sequencing batch reactor (SBR) systems, have received much attention (5-9). Many researchers have shown that the ORP and pH pattern in a given wastewater treatment process can be used successfully to identify specific control points. In particular, in biological nitrogen removal proc-* Corresponding author. e-mail: j-kim@kankyou.pref.saitama.jp phone: +81-(0)480-73-8369 fax: +81-(0)480-70-2031 esses, several investigators have identified the "nitrate knee" in ORP profiles and the "nitrate apex*' in pH profiles which indicate the end of denitrification (5, 6), and the "nitrogen break point" or the "DO elbow" in ORP profiles and the "ammonia valley" in pH profiles, which indicate the end of nitrification (7-9). According to these control ...

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Removal of nitrogen and phosphorus from swine wastewater by the activated sludge units with the intermittent aeration process

Cited by 104 publications

References 12 publications

Batch treatment of liquid fraction of pig slurry by intermittent aeration: process simulation and microbial community analysis

Batch treatment of liquid fraction of pig slurry by intermittent aeration: process simulation and microbial community analysis

Characterization of an acidification and equalization tank (AET) operating as a primary treatment of swine liquid effluent

Effectiveness of oxidation-reduction potential and pH as monitoring and control parameters for nitrogen removal in swine wastewater treatment by sequencing batch reactors

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