Phosphorus recovery using a crystallization process for Sewage Treatment Plant

2011 ◽  
Vol 6 (4) ◽  
Author(s):  
Kazuaki Shimamura ◽  
Tateki Kurosawa
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Ammonium Phosphate ◽  
Recovery Process ◽  
Phosphorus Recovery ◽  
Phosphorus Concentration ◽  
Magnesium Ammonium Phosphate ◽  
Magnesium Ammonium ◽  
Verification Test

A novel phosphorus recovery process enabling an effective reuse of recovered phosphorus as a resource has been developed. Three processes, which match the characteristics (sewage component, concentration and flow rate, etc.) of the waste water or the sludge generated form sewage treatment, are introduced here. Verification tests carried out using a crystallization of magnesium ammonium phosphate revealed a phosphorus crystallization exceeding 85%. Moreover, these tests show that the recovered phosphorus can be reused as a fertilizer. Another verification test carried out using a crystallization of hydroxylapatite revealed that the phosphorus concentration is reduced to a few milligrams per liter. In addition it is found that the recovered hydroxylapatite can be reused as a phosphorus ore. Each of the three processes is revealed to contribute to prevention of water contamination, as well as the recovery of phosphorus as a resource.

Development of a process for the recovery of phosphorus resource from digested sludge by crystallization technology

2008 ◽  
Vol 57 (3) ◽  
pp. 451-456 ◽  
Author(s):  
K. Shimamura ◽  
H. Ishikawa ◽  
A. Mizuoka ◽  
I. Hirasawa
Keyword(s):  
Ammonium Phosphate ◽  
Recovery Process ◽  
Phosphorus Recovery ◽  
Test Material ◽  
Phosphorus Concentration ◽  
Digested Sludge ◽  
Magnesium Ammonium Phosphate ◽  
Magnesium Ammonium ◽  
Final Effluent

Removal and recovery of phosphorus from sewage in form of MAP (magnesium ammonium phosphate) have attracted attention from the viewpoint of eutrophication prevention and phosphorus resource recovery as well as scaling prevention inside digestion tanks. In this work, phosphorus recovery demonstration tests were conducted in a 50 m3/d facility having a complete mixing type reactor and a liquid cyclone. Digested sludge, having 690 mg/L T-P and 268 mg/L PO4-P, was used as test material. The T-P and PO4-P of treated sludge were 464 mg/L and 20 mg/L achieving a T-P recovery efficiency of 33% and a PO4-P crystallization ratio of 93%. The reacted phosphorus did not become fine crystals and the recovered MAP particles were found to be valuable as a fertilizer. A case study in applying this phosphorus recovery process for treatment of sludge from an anaerobic-aerobic process of a 21,000 m3/d sewage system, showed that 30% of phosphorus concentration can be reduced in the final effluent, recovering 315 kg/d as MAP.

Analysis and balance of phosphorous removal from wastewater at urban wastewater treatment plant

2020 ◽  
Vol 15 (2) ◽  
pp. 142-151
Author(s):  
Peter Lukac ◽  
Lubos Jurik
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Phosphorus Recovery ◽  
Anaerobic Sludge ◽  
Biological Phosphorus Removal ◽  
The Mean

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.

scholarly journals Phosphorus Recovery from Excess Sludge with Subcritical Water Process and Magnesium Ammonium Phosphate Process

2005 ◽  
Vol 16 (4) ◽  
pp. 309-317
Author(s):  
Mitsuhiro Arakane ◽  
Tsuyoshi Imai ◽  
Sadaaki Murakami ◽  
Masami Takeuchi ◽  
Masao Ukita ◽  
...  
Keyword(s):  
Subcritical Water ◽  
Ammonium Phosphate ◽  
Phosphorus Recovery ◽  
Excess Sludge ◽  
Magnesium Ammonium Phosphate ◽  
Magnesium Ammonium

Phosphorus recovery as struvite from eutropic waters by XDA-7 resin

2012 ◽  
Vol 65 (12) ◽  
pp. 2091-2097 ◽  
Author(s):  
Huanwen Li ◽  
Zhiping Ye ◽  
Ying Lin ◽  
Fengying Wang
Keyword(s):  
Ammonium Phosphate ◽  
Phosphorus Recovery ◽  
Phosphate Adsorption ◽  
Nacl Solution ◽  
Acid Dissolution ◽  
Magnesium Ammonium Phosphate ◽  
Magnesium Ammonium ◽  
Struvite Precipitation ◽  
Ph Range ◽  
Removal And Recovery

Phosphorus releases into aquatic environment and its subsequent contribution to eutrophication have resulted in a widespread global pollution issue. However, phosphorus is a non-renewable source. The potential supplies of phosphorus are decreasing worldwide. Therefore, removal and recovery of phosphorus from the eutropic waters is important, emergent and necessary. In this research, experiments for recovering phosphate from eutropic waters by anion exchange combined with struvite precipitation were conducted. The results indicated that the prepared XDA-7 resin was an effective adsorbent for phosphate. The adsorption isotherm of XDA-7 resin was found to be a modified Freundlich type. The maximum phosphate adsorption (20.9 mg/g) occurred in the pH range of 6.0–8.0. Phosphate adsorbed on the XDA-7 resin was effectively desorbed with 8% NaCl solution, and the resin was able to be regenerated with 3% NaClO and 4% NaOH solutions. Phosphate desorbed from the resin was recovered as magnesium ammonium phosphate (struvite). The obtained struvite was analyzed by acid dissolution method, scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). The struvite precipitate was found to be 75.8% in purity, a high-value fertilizer.

Phosphorus Balance: Field Studies of Two Sewage Treatment Plants

1971 ◽  
Vol 6 (1) ◽  
pp. 96-114
Author(s):  
J.E. Radley ◽  
G.W. Heinke
Keyword(s):  
Biological Treatment ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Field Studies ◽  
Background Information ◽  
Phosphorus Concentration ◽  
Flow Measurements ◽  
Analytical Technique ◽  
Unit Operations

Abstract Removal of phosphates from wastewater will become an important requirement in the near future in order to arrest the eutrophication of our surface water supplies. Present day treatment plants are inefficient in removing phosphates. Additions of new and deletions or changes in existing processes will be required. Knowledge of the concentration and type of phosphorus compound in all streams of a conventional biological treatment plant will be required to make effective and economical changes. This work attempts a mass balance on phosphorus on unit operations of two activated sludge plants: The North Toronto Sewage Treatment Plant and the Penetanguishene Sewage Treatment Plant. Preliminary field studies were carried out over several weeks to establish background information on phosphorus concentration and type at each plant. From this information, the number of sampling streams, timing of sampling, and accuracy and precision of phosphate and flow measurements for short, in-depth, phosphorus studies on each plant was made. Two 2–3 day surveys were made at each plant. The data are presented in the form of phosphorus mass balances on important unit operations as well as on the entire plant. Balances were found to be within the combined experimental error of sampling, analytical technique, and flow measurement. Major phosphate streams in decreasing order are the return sludge, raw influent, primary sludge and digestor supernatant. Present phosphorus reduction is about 20–30%, as expected for biological treatment. The possible effect of operational changes and additions of phosphorus removal process is discussed.

Experiences gained in the operation of anaerobic treatment plants in Germany

1994 ◽  
Vol 30 (12) ◽  
pp. 415-424 ◽  
Author(s):  
U. Austermann-Haun ◽  
C.F. Seyfried
Keyword(s):  
Industrial Wastewater ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Ammonium Phosphate ◽  
Solid Material ◽  
Anaerobic Treatment ◽  
Municipal Wastewater Treatment ◽  
Magnesium Ammonium Phosphate ◽  
Magnesium Ammonium ◽  
The University

In the western part of Germany there are 77 full scale anaerobic treatment plants treating industrial wastewater. The ISAH (Institut für Siedlungswasserwirtschaft und Abfalltechnik at the University of Hannover) is or was involved in the investigations, the design and/or operation of 14 of these plants. Some industries (sugar beet, starch, pectin, brewery, vegetable) with their special problems with treating their wastewater anaerobically are described. Experiences of how to handle high nitrate concentrations, to treat a mixture of several industrial wastewaters, to prevent or handle lime, magnesium ammonium phosphate (MAP) or aluminium precipitations are reported. The first municipal wastewater treatment plant combined with a separate anaerobic stage to treat a wastewater mixture of several small factories is described. Something very special about this plant is the construction of the acidification tank. Using the “teapot effect” to enrich the solid material in the centre of the bottom, the solids can be taken from the bottom of the tank and pumped to the municipal sludge digester.

Phosphorus recovery from anaerobic digester supernatant by struvite crystallization: model-based evaluation of a fluidized bed reactor

2008 ◽  
Vol 58 (6) ◽  
pp. 1321-1327 ◽  
Author(s):  
M. S. Rahaman ◽  
D. S. Mavinic ◽  
N. Ellis
Keyword(s):  
Fluidized Bed ◽  
Plug Flow ◽  
Ammonium Phosphate ◽  
Phosphorus Recovery ◽  
Reactor Performance ◽  
Magnesium Ammonium Phosphate ◽  
University Of British Columbia ◽  
Magnesium Ammonium ◽  
Struvite Crystallization ◽  
Anaerobic Digester Supernatant

This paper is an attempt to model the UBC (University of British Columbia) MAP (Magnesium Ammonium Phosphate) fluidized bed crystallizer. A mathematical model is developed based on the assumption of perfect size classification of struvitre crystals in the reactor and considering the movement of liquid phase as a plug flow pattern. The model predicts variation of species concentration of struvite along the crystal bed height. The species concentrations at two extreme ends (inlet and outlet) are then used to evaluate the reactor performance. The model predictions provide a reasonable good fit with the experimental results for both PO4—P and NH4—N removals. Another important aspect of this model is its capability of predicting the crystals size and the bed voidage at different height of the reactor. Those predictions also match fairly well with the experimental observations. Therefore, this model can be used as a tool for performance evaluation of the reactor and can also be extended to optimize the struvite crystallization process in the UBC MAP reactor.

Nutrient Removal in a 2-Stage Biological Sewage Treatment Plant

1992 ◽  
Vol 25 (4-5) ◽  
pp. 135-142
Author(s):  
E. Sickert
Keyword(s):  
Nutrient Removal ◽  
Combined Treatment ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Distribution Channel ◽  
Operating Conditions ◽  
Phosphorus Concentration ◽  
Legal Regulations ◽  
Excess Sludge

The Dradenau sewage treatment plant consists basically of a large activated sludge plant which supplements the treatment stages of the Köhlbrandhöft plant. Although built to mainly oxidize ammonia and despite unfavourable operating conditions - the different locations of the Köhlbrandhöft and Dradenau plants - considerable amounts of nitrogen have successfully been eliminated. Denitrification takes place in the distribution channel of the Dradenau plant and in one of the biological stages of the Köhlbrandhöft plant. This stage takes over the excess sludge from the Dradenau plant resulting in nitrifying - and denitrifying - part of the nitrogen load already here. There is an average overall reduction of 70 %. Simultaneous precipitation at the Köhlbrandhöft treatment plant reduces the phosphorus concentration in the effluent of the combined treatment plants Köhlbrandhöft/Dradenau to values recently set by legal regulations (1 mgP/l).

scholarly journals Recycling of Phosphorus and Ammonia Nitrogen from Digestate

2018 ◽  
Vol 64 (4) ◽  
pp. 36-39
Author(s):  
Katrin Calábková ◽  
Petra Malíková ◽  
Silvie Heviánková ◽  
Michaela Červenková
Keyword(s):  
Sewage Treatment ◽  
Ammonium Phosphate ◽  
Ammonia Nitrogen ◽  
Stoichiometric Ratio ◽  
Nitrogen And Phosphorus ◽  
Magnesium Ammonium Phosphate ◽  
Quality Of Water ◽  
Magnesium Ammonium ◽  
Stirring Time ◽  
High Concentrations

Abstract Digestate from biogas plants, formed by dewatering anaerobically stabilized sludge, is characteristic of high concentrations of phosphates and ammonia nitrogen suitable for further use. Phosphorus is an element widely used to produce fertilizers, and because of its continually shortening natural supplies, recycling of phosphorus is gaining on significance. Both phosphorus and nitrogen are important elements and their presence affect the quality of water resources. Both elements can contribute to eutrophication. At the same time, both phosphorus and ammonia nitrogen, are important elements for agricultural production, and therefore greater demands are being made on the effort to connect sewage treatment processes and the process of recycling of these nutrients. A suitable product of phosphorus and ammonia nitrogen are phosphates in the form of a structurally-poorly soluble precipitate of magnesium ammonium phosphate (struvite). This form of slowly decomposing fertilizer is distinguished by its fertilizing abilities. Compared to direct use of digestate as a fertilizer, struvite is more stable and can gradually release ammonia nitrogen for a long time without unnecessary losses. In the reported experiments, the precipitation efficiency of the recycling of ammonia nitrogen and phosphorus from the digestate liqour (liquid discharge from digestate) was, at a stoichiometric ratio of Mg2+: NH4+: PO43− (3.2: 1: 0.8) and a stirring time of 15 minutes, 87 % for ammonia nitrogen ions.

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