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Biological Phosphorus Removal with Granular Sludge in SBR

Xiaoying Liu, Chao Guo, Dangcong Peng

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Abstract

The formation and performance of granular sludge seeded with flocculating sludge was studied in a 4L sequencing batch reactor (SBR) treating a synthetic wastewater with sodium acetate as carbon source. By gradually reducing the settle time from 30 to 10 min, granule sludge was formed on day 20. The granules had a specific gravity of 1.0439, diameters of 0.5-2 mm, and sludge volume index (SVI) of less than 50 mL/g. Phosphorus removal granular sludge had good phosphorus removal characteristics. The efficiency of phosphorus removal was over 90%. The max. specific phosphorus release rate (SRPR) and the max. specific phosphorus uptake rate (SUPR) was 62.65 mg/(gVSSldrh) and 51.76 mg/(gVSSldrh), respectively. And the sludge phosphorus content (TP/SS) was 6.5%.

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What this paper is about

The formation and performance of granular sludge seeded with flocculating sludge was studied in a 4L sequencing batch reactor (SBR) treating a synthetic wastewater with sodium acetate as carbon source. By gradually reducing the settle time from 30 to 10 min, granule sludge was formed on day 20. The granules had a specific gravity of 1.0439, diameters of 0.5-2 mm, and sludge volume index (SVI) of less than 50 mL/g. Phosphorus removal granular sludge had good phosphorus removal characteristics. The efficiency of phosphorus removal was over 90%. The max. specific phosphorus release rate (SRPR) and the max. specific phosphorus uptake rate (SUPR) was 62.65 mg/(gVSSldrh) and 51.76 mg/(gVSSldrh), respectively. And the sludge phosphorus content (TP/SS) was 6.5%.

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Available abstract

The formation and performance of granular sludge seeded with flocculating sludge was studied in a 4L sequencing batch reactor (SBR) treating a synthetic wastewater with sodium acetate as carbon source. By gradually reducing the settle time from 30 to 10 min, granule sludge was formed on day 20. The granules had a specific gravity of 1.0439, diameters of 0.5-2 mm, and sludge volume index (SVI) of less than 50 mL/g. Phosphorus removal granular sludge had good phosphorus removal characteristics. The efficiency of phosphorus removal was over 90%. The max. specific phosphorus release rate (SRPR) and the max. specific phosphorus uptake rate (SUPR) was 62.65 mg/(gVSSldrh) and 51.76 mg/(gVSSldrh), respectively. And the sludge phosphorus content (TP/SS) was 6.5%.

Key concepts: Enhanced biological phosphorus removal, Phosphorus, Granule (geology), Sequencing batch reactor, Flocculation, Chemistry, Pulp and paper industry, Sewage treatment

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