An improvement in the bismuth phosphate carrier precipitation process for recovering plutonium is described. It has been found that a more granular and more easily filterable carrier precipitiite is formed if the addition of the bismuth and phosphate ions is effected by first adding 9/10 of the bismuth ions necessary, then slowly adding all of ...
By using crystallization methods for P recovery it is possible to obtain phosphates such as calcium phosphate (Ca-P), magnesium phosphate (MP), ammonium phosphate (MAP or struvite) or potassium ...
EcoBatRec process is a patented thermal treatment process that offers an alternative to conventional recycling routes, and it is centered on lithium recovery. The objective of the EcoBatRec process is to achieve the 50% mass recycling stipulated by the EU directive using robust and flexible technology, at a lower recycling cost, and …
Yang Y, Zheng X, Cao H, et al. (2017) A closed-loop process for selective metal recovery from spent lithium iron phosphate batteries through mechanochemical activation. ACS Sustainable Chemistry & Engineering 5: 9972–9980.
Fluosilisic acid (HrSiFu) is mainly produced as a by-product from the wet process of Phosphoric Acid production from fluorapatite. Phosphate rock always contains fluorine. For F/P2O5 ratios, the ...
3. Method according to claim 1 or 2, wherein the vivianite like structures comprise more than 70%, preferably more than 80%, of the initial amount of phosphate in the incoming stream. 4. Method according to one of the foregoing claims, wherein the iron salts comprise one or more of iron chloride and iron sulphate. 5.
Chemical precipitation is a consolidated technique applied in wastewater treatment to remove and recover phosphorous and ammonium that remain in the effluent after the anaerobic digestion treatment. The …
Targeted Phosphorus Recovery *Patent-Pending Technology* NEWEA 2019 Spring Meeting June 3rd, 2019 ... Aerobic uptake of phosphate (PO 4 3-) EBNR. …
An innovative element of Ostara technology is the patented cylindrical reactor with ... which very selectively separates phosphate ions from soluble nitrogen, phosphate recovery …
Hydrothermal carbonization enables the valorization of biomass via thermochemical conversion into various products. Today, this technology is experiencing a situation similar to that experienced in the …
By using the effluent from trichlorfon degradation for nutrient recovery, the process shows that 92.96% phosphorus can be recovered at a pH of 11.5 with a Mg:P molar ratio of 1.8. The results prove that the proposed process could degrade trichlorfon and recover nutrients efficiently at laboratory scale.
Prompt phosphorus crisis makes its techniques and engineering extended globally, which is associated with a community of shared future for mankind. European countries and Japan with scarce phosphorus rocks have started up developing techniques and applying engineering on phosphate recovery from wastewater and waste solids, and also they …
patented for thermal phosphate revery process. Thermal treatment of phosphate rock - patents.googleAn improved, substantially more energy efficient, thermal treatment process for use on relatively high organ Adresse: n ° 169, avenue scientifique, zone nationale de développement industriel des hautes technologies, Zhengzhou
Newer methods for phosphorus recovery from wastewater include these based on the crystallization of hydroxyapatite under alkaline conditions (DHV Crystalactor process, KURITA). Patented ...
Based on the model, an evaluation method was established to indicate the energy utilization ratio, the economic performance and environmental effects of the thermal process. The method was used to analyze retrofitting for the waste heat recovery for thermal processing of phosphoric acid. The results demonstrate that the retrofit is …
The role of SiO 2 in the traditional Wöhler process can be understood in the context of Lux–Flood acid–base theory, where SiO 2 is a Lux acid (oxide acceptor) and the phosphate starting material is a Lux base (oxide donor). The present authors hypothesized that increasing the Lux acidity of the electrolyte could facilitate reductive cleavage of …
phosphate recovery methods, one well-established process, known as enhanced biological phosphorus removal (EBPR), utilizes microorganisms to take up phosphate from wastewater and store it in intracellular polyphosphate granules.28−30 …
On the other hand, about 2% of phosphate rocks are processed via the thermal process (Jupp et al., 2021) to produce elemental white phosphorus. The rocks are heated with coke (carbon source) and silica (SiO 2 ) at 1500°C–1600°C to release phosphorus in gas form (P 4 ).
The EcoPhos ® process is a patented, already full-scale implemented multi-step approach to valorize low grade phosphate rock and also P rich ashes to high …
Magnesium ammonium phosphate formation, recovery and its application as valuable resources: a review. YingHao Liu, YingHao Liu. Department of Animal Life System, Kangwon National University, Chuncheon, 200-701 South Korea ... study describes the growing concern for diminishing P resources and then the chemical …
Thermal process The thermal (or Wöhler) process is an energy intensive process that produces elemental white phosphorus (P 4). The remaining 2% of mined PR is …
A process for triphenyl phosphate (TPPO) recovery from PCBs was established. • The structure of recycled TPPO was in good agreement with TPPO standard material. • The PCBs became phosphorus-free with structure and inorganic components maintained. • The kinetics analysis of solvothermal process was evaluated and better …
The present invention provides a method for recovery of phosphate, in the form of magnesium ammonium phosphate (MAP), from a process for treating a biomass material which process comprises a digestion step performed in a digestion tank and includes a pre-treatment step employing a thermal hydrolysis, characterized in that a magnesium …
An innovative element of Ostara technology is the patented cylindrical reactor with ... which very selectively separates phosphate ions from soluble nitrogen, phosphate recovery can reach more than 95% ... the thermal process at 125°C improved the total P content by about 1.7% for sewage sludge, and then after 63 days of the anaerobic ...
The SESAL-Phos process (sequential elution of sewage sludge ash for aluminum and phosphorus recovery) (Fig. 6) presented …
The optimum temperature for the treatment of the GS, for P-recovery, was determined via batch sorption process viz.: 50 mL of synthetic P rich solution, derived from potassium dihydrogen phosphate (KH 2 PO 4) salt, of fixed concentration (40 mg/L) was contacted with 0.1 g of each thermally treated material (i.e., TS 100 –TS 1000).
The present invention provides a method for recovery of phosphate, in the form of magnesium ammonium phosphate (MAP), from a process for treating a biomass …
Thermal treatment of phosphate ores. More than 10% of the world marketable phosphates are produced by calcination. Traditionally, heat treatment of phosphate ores is defined as heating up the ore to a certain temperature to obtain a product with specific properties. The main objectives behind heating up the ore are:
The EcoPhos ® process is a patented, already full-scale implemented multi-step approach to valorize low grade phosphate rock and also P rich ashes to high quality market products as phosphoric acid or animal feed (EcoPhos, 2015) (Fig. 9). First step is the leaching of the ash with HCl.
A patented technique by Sloop describes a treatment of full ... Lin, Y.-C.; Wu, S.-H. A novel recovery process of metal values from the cathode active materials of the lithium-ion secondary batteries. ... Liu, X. Thermal treatment process for the recovery of valuable metals from spent lithium-ion batteries. Hydrometallurgy 2016, 165, 390 ...
In this work, we demonstrate phosphate recovery directly from raw and mineral-spiked septic tank effluent by electrochemical pH shifting, termed electrohydromodulation (EHM), without expensive chemical addition. EHM using a CMI-7000 multivalent cation exchange membrane (MCEM) at 5 V at 1.347 mA/cm 2 resulted …
The LithoRec process combines electrical, mechanical, mild thermal, and hydrometallurgical treatment with the aim of recovering nearly all valuable materials of battery systems. A process flow chart of the process route for the preparation of the different recyclates is shown in Fig. 2.1. Detailed descriptions of the process steps and …
The first step towards phosphoric acid production is the recovery of P, as calcium phosphate, from the municipal wastewater. This was achieved by adding calcium hydroxide (Ca(OH)₂), popularly known as hydrated or slaked lime, in the wastewater matrix, which would scavenge the P content as reported by Dunets and Zheng [28].Calcium …
For instance, hydrochloric acid digestion using 5 M HCl at 130 °C showed a phosphate recovery of 97.3 % after one hour. With 5 mol L −1 H 3 PO 4 phosphate recovery was even 98.8 %. Apparently, with phosphate yields ≥ 97.3 % catalyst digestion with mineral acids at elevated temperatures is promising.
The concepts of sustainability and circular economy in wastewater treatment have recently gained momentum and they are fundamentally pursued to minimize and eliminate environmental impacts associated with wastewater. In this study, the concept of circular economy was explored in the treatment of municipal wastewater, through …
The technique of using hot process softening to reduce the hardness of water for thermal recovery programs represents an extension of the chemical principles which occur at low temperatures. At higher temperatures the solubilities are such that much greater hardness reduction can be brought about by treating the water hot than by treating it ...
