Phosphorus Recovery from Anaerobically Digested Liquor of Screenings

Abstract:Phosphorus is a major substance that is needed especially for agricultural production or for the industry. At the same time it is an important component of wastewater. At present, the waste management priority is recycling and this requirement is also transferred to wastewater treatment plants. Substances in wastewater can be recovered and utilized. In Europe (in Germany and Austria already legally binding), access to phosphorus-containing sewage treatment is changing. This paper dealt with the issue of phosphorus on the sewage treatment plant in Nitra. There are several industrial areas in Nitra where record major producers in phosphorus production in sewage. The new wastewater treatment plant is built as a mechanicalbiological wastewater treatment plant with simultaneous nitrification and denitrification, sludge regeneration, an anaerobic zone for biological phosphorus removal at the beginning of the process and chemical phosphorus precipitation. The sludge management is anaerobic sludge stabilization with heating and mechanical dewatering of stabilized sludge and gas management. The aim of the work was to document the phosphorus balance in all parts of the wastewater treatment plant - from the inflow of raw water to the outflow of purified water and the production of excess sludge. Balancing quantities in the wastewater treatment plant treatment processes provide information where efficient phosphorus recovery could be possible. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. There are also two outflows - drainage of cleaned water to the recipient - the river Nitra - 9.9 kg Ptot/day and Ptot content in sewage sludge - about 120.3 kg Ptot/day - total 130.2 kg Ptot/day.

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Phosphorus Recovery – A Voyage From Sewage Sludge To Johannes Vermeer

10.31988/scitrends.40862 ◽

2018 ◽

Author(s):

P. Wilfert ◽

L. Korving ◽

M.C.M. Van Loosdrecht

Keyword(s):

Sewage Sludge ◽

Phosphorus Recovery ◽

Johannes Vermeer

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The Effect of Surface Area of Eggshells on Phosphorus Recovery from Human Urine

Proceedings of the Water Environment Federation ◽

10.2175/193864715819558091 ◽

2015 ◽

Vol 2015 (2) ◽

pp. 1-7

Author(s):

Siriluk Choosak ◽

Patiya Kemacheevakul

Keyword(s):

Surface Area ◽

Human Urine ◽

Phosphorus Recovery ◽

Effect Of Surface

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Simultaneous amorphous silica and phosphorus recovery from rice husk poultry litter ash

RSC Advances ◽

10.1039/d0ra10120f ◽

2021 ◽

Vol 11 (15) ◽

pp. 8927-8939

Author(s):

Laura Fiameni ◽

Ahmad Assi ◽

Ario Fahimi ◽

Bruno Valentim ◽

Karen Moreira ◽

...

Keyword(s):

Rice Husk ◽

Amorphous Silica ◽

Poultry Litter ◽

Phosphorus Recovery ◽

Secondary Source ◽

Poultry Litter Ash

Rice husk poultry litter ash (RHPLA) is proposed as a valuable secondary source to recover phopshorus and amorphous silica in three steps.

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Sewage Sludge Treatment by Hydrothermal Carbonization: Feasibility Study for Sustainable Nutrient Recovery and Fuel Production

Energies ◽

10.3390/en14092697 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2697

Author(s):

Gabriel Gerner ◽

Luca Meyer ◽

Rahel Wanner ◽

Thomas Keller ◽

Rolf Krebs

Keyword(s):

Liquid Phase ◽

Sewage Sludge ◽

Hydrothermal Carbonization ◽

Economic Feasibility ◽

Phosphorus Recovery ◽

High Yield ◽

Nutrient Recovery ◽

Waste Biomass ◽

Sludge Treatment ◽

Sewage Sludge Treatment

Phosphorus recovery from waste biomass is becoming increasingly important, given that phosphorus is an exhaustible non-renewable resource. For the recovery of plant nutrients and production of climate-neutral fuel from wet waste streams, hydrothermal carbonization (HTC) has been suggested as a promising technology. In this study, digested sewage sludge (DSS) was used as waste material for phosphorus and nitrogen recovery. HTC was conducted at 200 °C for 4 h, followed by phosphorus stripping (PS) or leaching (PL) at room temperature. The results showed that for PS and PL around 84% and 71% of phosphorus, as well as 53% and 54% of nitrogen, respectively, could be recovered in the liquid phase (process water and/or extract). Heavy metals were mainly transferred to the hydrochar and only <1 ppm of Cd and 21–43 ppm of Zn were found to be in the liquid phase of the acid treatments. According to the economic feasibility calculation, the HTC-treatment per dry ton DSS with an industrial-scale plant would cost around 608 USD. Between 349–406 kg of sulfuric acid are required per dry ton DSS to achieve a high yield in phosphorus recovery, which causes additional costs of 96–118 USD. Compared to current sewage sludge treatment costs in Switzerland, which range between 669 USD and 1173 USD, HTC can be an economically feasible process for DSS treatment and nutrient recovery.

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