Posttreatment of a Brewery Wastewater Using a Sequencing Batch Reactor

Rodrigues, Ana; Brito, A. G.; Melo, L. F.

doi:10.2175/106143001x138679

Cited by 28 publications

(23 citation statements)

References 21 publications

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“…With rapid development of soybean industry in recent years in China, the soybean wastewater is doing greater and greater harm to the water environment, moreover China is now speeding up the construction and operation of more and more wastewater treatment plants, and as a general rule the CASP (Conventional Activated Sludge Process) is mainly employed in city, where the land available for the construction of wastewater treatment plants is limited and expensive [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Removal Effect of A/O SBR Process for Soybean Wastewater

Zuo¹,

Wang²,

Li³

et al. 2014

Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

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Abstract-With rapid development of soybean industry in recent years in China, the soybean wastewater is doing greater and greater harm to the water environment. Now the SBR (Sequencing Batch Reactor) process has been widely used all over the world, and the SBR process is a biologic treating process of wastewater with simple structure and flexible operation. For example Anoxic/Oxic (A/O) process can be combined flexibly with SBR process. So in this paper in order to study the removal efficiency of soybean wastewater, the A/O SBR combined process was investigated with anoxic stir for 30min and aeration for 3h. The MLSS was controlled at 2500 mg/L-3000 mg/L and sludge retention time (SRT) can be controlled in 12d-16d. The results showed that the concentration of COD, ammonia nitrogen, nitrite, nitrate and phosphate can reach 50mg/L, 5mg/L, 5mg/L, 4.5mg/L and 1mg/L respectively. Thus the A/O SBR process can obtain good effect for soybean wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Removal Effect of A/O SBR Process for Soybean Wastewater

Zuo¹,

Wang²,

Li³

et al. 2014

Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

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“…The SBR has become increasingly popular in engineering applications for industrial wastewater treatment, such as poultry processing wastewater [5], brewery wastewater [6] and reject water from anaerobic sludge digesters [7]. The conventional operation for nitrogen removal in SBR processes is that only one aerobic-anoxic (OAA) cycle is performed for complete nitrification followed by denitrification.…”

Section: Introductionmentioning

confidence: 99%

Process Control of an Alternating Aerobic‐Anoxic Sequencing Batch Reactor for Nitrogen Removal via Nitrite

2008

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Nitrogen removal via nitrite is a novel technology and is becoming popular for engineering applications since it results in a saving of the aeration energy required for nitritation and external carbon sources for denitritation. An alternating aerobic-anoxic (AAA) operational pattern was applied in a sequencing batch reactor (SBR) process to improve the nitrogen removal efficiency and achieve partial nitrification via nitrite from industrial wastewater with influent alkalinity deficiencies. The results showed that the online monitoring of the pH-time variations during nitrification could indicate if the alkalinity was sufficient and when the ammonia nitrogen was completely oxidized. Under conditions of deficient influent alkalinity, the AAA process reduced the external alkalinity and the carbon sources addition and improved the effluent quality with ammonia nitrogen concentration below the detection limits. Half of the alkalinity previously consumed during aerobic nitrification could be recovered during the subsequent anoxic denitrification period. If the cycles of alternating aerobic/anoxic were repeated more than twice, the first nitrification cycle was stopped when the pH decreased by 0.4-0.5. The middle nitrification was terminated when the pH decreased by 0.8-1.0, and the final nitrification duration was controlled by the dissolved oxygen (DO) breakpoint and ammonia valley on the pH profile. Each anoxic timescale for denitrification was determined by the nitrate knee on the oxidation-reduction potential (ORP) profile and the nitrate apex on the pH profiles. In comparison to the conventional SBR process, the AAA process with a real-time control strategy resulted in an improved nitrogen removal efficiency of greater than 97 % under conditions of deficient influent alkalinity. Moreover, nitrogen removal via nitrite was achieved with a nitrite accumulation rate above 95 %.

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“…This simplifies the technological process and saves construction cost [5,6]. The SBR has become increasingly popular for industrial wastewater treatment [7,8]. After feeding wastewater to the SBR, one operational method is that only one aerobic-anoxic (OAA) cycle is performed for complete nitrification followed by denitrification; the other is that several aerobic-anoxic cycles are performed, that is, the AAA process.…”

Section: Introductionmentioning

confidence: 99%

Process evaluation of an alternating aerobic-anoxic process applied in a sequencing batch reactor for nitrogen removal

Peng

Zeng

Wang

2007

Front.Environ.Sci.Eng.China

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In order to improve the nitrogen removal efficiency and save operational cost, the feasibility of the alternating aerobic-anoxic process (AAA process) applied in a sequencing batch reactor (SBR) system for nitrogen removal was investigated. Under sufficient influent alkalinity, the AAA process did not have an advantage over one aerobicanoxic (OAA) cycle on treatment efficiency because microorganisms had an adaptive stage at the alternating aerobic-anoxic transition, which would prolong the total cycling time. On the contrary, the AAA process made the system control more complicated. Under deficient influent alkalinity, when compared to OAA, the AAA process improved treatment efficiency and effluent quality with NH 4 + -N in the effluent below the detection limit. In the nitrification, the average stoichiometric ratio between alkalinity consumption and ammonia oxidation is calculated to be 7.07 mg CaCO 3 /mg NH 4 + -N. In the denitrification, the average stoichiometric ratio between alkalinity production and NO 3 − -N reduction is about 3.57 mg CaCO 3 /mg NO 3 − -N. As a result, half of the alkalinity previously consumed during the aerobic nitrification was recovered during the subsequent anoxic denitrification period. That was why the higher treatment efficiency in the AAA process was achieved without the supplement of bicarbonate alkalinity. If the lack of alkalinity in the influent was less than 1/3 of that needed, there is no need for external alkalinity addition and treatment efficiency was the same as that under sufficient influent alkalinity. Even if the lack of alkalinity in the influent was more than 1/3 of that needed, the AAA process was an optimal strategy because it reduced the external alkalinity addition and saved on operational cost.

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Posttreatment of a Brewery Wastewater Using a Sequencing Batch Reactor

Cited by 28 publications

References 21 publications

Removal Effect of A/O SBR Process for Soybean Wastewater

Removal Effect of A/O SBR Process for Soybean Wastewater

Process Control of an Alternating Aerobic‐Anoxic Sequencing Batch Reactor for Nitrogen Removal via Nitrite

Process evaluation of an alternating aerobic-anoxic process applied in a sequencing batch reactor for nitrogen removal

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