Forecasting Energy Savings Achieved by Automation of Dissolved Oxygen and Sludge Age Controls and Optimization of Set Points

Ekster, Alex; Sung, R.J.

doi:10.2175/193864707787970142

Cited by 1 publication

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“…While the performance of sludge settlement directly affect the treatment effect of wastewater [1]. Currently, studies related to the factors of activated sludge settlement mainly on temperature, dissolved oxygen, sludge load, sludge age and pH [2], but rarely on the effect of light. In our study, Based on the SBR reactor with total volume 20L, at room temperature (20 ℃~22 ℃), synthetic wastewater, focused on the factors of light, running cycles and dissolved oxygen which had effect on sludge sedimentation performance.…”

Section: Introductionmentioning

confidence: 99%

Effects of the activated sludge performance in the sequencing batch

Zhang

Zhong

Luo

2017

Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)

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Abstract. To explore the factors affecting sludge settlement, cultivation of aerobic activated sludge in a 20L sequencing batch reactors (SBR), using sludge in the aeration pool of the sewage plant as seed sludge, keep in room temperature (20 ºC ~22 ºC), artificial synthetic wastewater. By changing the SRT, DO, running cycles and lighting condition, monitoring sludge settlement ratio (SV), mixed liquor suspended solids (MLSS) and the sludge volume index (SVI). The novel results we found were that without light, the sludge were prone to inflation easily. Meanwhile, filamentous bacteria could be easily inflated under low DO; running cycles have an effect on sludge settle ability, three cycles a day had much lower SVI value than once a day. When the DO stay from 2mg/L to 6mg/L, one cycle a day, the sludge performance can keep stable, ammonium-nitrogen removal rate can reach more than 70%.

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Section: Introductionmentioning

confidence: 99%