Species, Fractions and Nutritional Value of Phosphorus in the Typical Biological Treatment Process of Sludge
Cong Wang 1,2
Min Wu 1
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College of Environmental Science & Engineering, Tongji University, Shanghai, PR China
Shanghai Urban Construction Design & Research Institute (Group) Co. Ltd., 3447 Dongfang Rd, Shanghai, PR China
College of Environment, Hohai University, Nanjing, PR China
Shanghai Municipal Engineering Design Institute (Group) Co. LTD., Shanghai, PR China
Power China Huadong Engineering Corporation Limited, 201 Gaojiao Rd, Hangzhou, PR China
School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, PR China
Yangtze Ecology and Environment Co. Ltd., Wuhan, PR China
Submission date: 2022-11-14
Final revision date: 2023-01-10
Acceptance date: 2023-02-16
Online publication date: 2023-03-30
Publication date: 2023-05-18
Corresponding author
Ming Jiang   

Shanghai Urban Construction Design & Research Institute (Group) Co., Ltd., China
Pol. J. Environ. Stud. 2023;32(3):2875-2883
Sludge treatment is an important part of wastewater treatment and the recovery and utilization of phosphorus from wastewater treatment plant (WWTP) is a challenge for sludge treatment and product disposal. In this paper, eight Chinese typical sludge treatment projects were selected to analyze the species and fractions, and characterization of phosphorus during the sludge treatment process. Furthermore, the nutritional value of phosphorus in the sludge treatment process and the land resource utilization value of phosphorus in the sludge treatment product were discussed. The results showed that the insufficient release of phosphorus to supernatant during anaerobic digestion (AD) of sludge is an important factor restricting phosphorus recovery. Phosphorus in sludge aerobic composting treatment products is mainly in the solid phase, and the concentration effect is beneficial for the phosphorus recovery potential. Phosphorus in sludge treatment products mainly exists in the form of non-apatite inorganic phosphorus, which indicates that improving the bioavailability of phosphorus in sludge treatment products is the key to realizing the nutritional value of the sludge products.
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