Simultaneous Mixotrophic Nitrate Removal and Phosphorus …

Overall, this study suggests that sponge-iron DNF technology could remove both nitrate and phosphorus, allowing the treatment of municipal wastewater without relying on external carbon sources for deep nitrogen removal and chemicals for phosphorus removal, thus saving operational costs.

ASTM E278-01: Phosphorus Testing in Iron Ores

ASTM E278-01 test method covers the determination of phosphorus in iron ores, concentrates, and agglomerates. The phosphorus is measured from the range (0.01% to 1.00%). The procedures for determining the phosphorus …

Phosphorus recovery from waste activated sludge by sponge iron …

As a novel phosphorus recovery product, vivianite (Fe3(PO4)2·8H2O) has attracted much attention due to its enormous recycling potential and foreseeable economic value. Taking sponge iron as seed material, the effect of different reaction conditions on the recovery of phosphorus in waste activated sludge by vivianite crystallization was studied. Through single …

Performances and mechanisms of simultaneous nitrate and phosphate …

Sponge iron is a potential material for nitrogen and phosphate removal. To explore the performances and mechanisms of nitrogen and phosphate removal by sponge iron, a sponge iron biofilter was established. The results showed that nitrate was completely removed at HRT of 48 h without external carbon source and at HRT of 3 h with C/N ratio of 5.

The Behavior of Phosphorus in the Hydrogen‐Based Direct …

This kinetic delay highlights the importance of avoiding the reduction of phosphorus oxide during prereduction. While if strongly bound as calcium-phosphorus oxide, the kinetic delay is helpful and keeps phosphorus in the slag phase, the opposite is the case if sponge iron contains it in elemental condition.

Performances and mechanisms of simultaneous removal of …

Zero-valent iron (ZVI) was a common iron that was widely used in wastewater treatment. Compared with single-cell and single-zero-valent iron systems, there was a significant enhancement in enzyme activity associated with denitrification in coupled systems (Wang et al., 2019a).Sponge iron (SI) is a cost-effective metal that plays a vital role in sewage treatment …

In-situ anaerobic treatment removes the passivation layer of sponge …

Sponge iron (s-Fe 0) has a large specific surface area, is cheap and easy to obtain, and has a good reduction capacity.Therefore, its efficacy in enhanced wastewater denitrification and phosphorus removal has been extensively examined. Because of the strong magnetic properties and reactivity of s-Fe 0, a passivation layer dominated by iron oxides is formed in …

Study of Phosphorus Removal by Using Sponge Iron …

Phosphorus is one of the key elements caus-ing lake eutrophication. This paper deals with phosphate removal by Sponge iron in batch and fixed-bed opera-tion. Isotherm and kinetic …

(PDF) Effects of Recycled Sponge Iron on Phosphorus …

Phosphorus in water not only degrades water quality but also leads to a waste of resources. In this study, adsorption thermodynamics and kinetics were used to study the effect of sponge iron on...

Synergistic Removal of Nitrogen and Phosphorus in …

Sponge iron is a promising material for the removal of phosphorus and nitrogen because of its strong reducing power, high electronegativity, and inexpensive cost. The influence of factors including initial solution pH, dosage, and the Fe/C ratio was investigated.

Enhanced phosphorus removal by microbial-collaborating sponge iron

Meanwhile, the total phosphorus (TP), OP, Fe/Al-P, and Ca-P content in sediment increased by 33.8, 7.7, 23.1, and 23.1 %, respectively, implying that under the action of sponge-iron, the locked ...

Enhanced phosphorus removal by microbial-collaborating sponge iron

The collaborative and mutually reinforcing phosphorus removal in domestic wastewater in a sponge iron and microorganisms system was studied through a laboratory and a pilot scale experiment. The results showed that the total phosphorus concentration of the effluent of less than 0.5 mg/L could be ach …

Performances and mechanisms of simultaneous nitrate and …

Sponge iron is a potential material for nitrogen and phosphate removal. To explore the performances and mechanisms of nitrogen and phosphate removal by sponge iron, a …

Study of Phosphorus Removal by Using Sponge Iron …

Phosphorus is one of the key elements causing lake eutrophication. This paper deals with phosphate removal by Sponge iron in batch and fixed-bed operation. Isotherm and kinetic studies are conducted. The isotherm data is described by the Freundlich and Langmuir model, while the kinetic data of adsorption is fitted by the pseudo-second-order kinetic model. …

Simultaneous Mixotrophic Nitrate Removal and …

The aim of this study was to examine the possibility of simultaneous removal of nitrate and phosphorus from simulated secondary effluent by employing a sponge-iron-based denitrifying filter at ...

Study of Phosphorus Removal by Using Sponge Iron …

Phosphorus is one of the key elements causing lake eutrophication. This paper deals with phosphate removal by Sponge iron in batch and fixed-bed operation. Isotherm and kinetic studies are conducted.

(PDF) Effects of Recycled Sponge Iron on Phosphorus …

Phosphorus in water not only degrades water quality but also leads to a waste of resources. In this study, adsorption thermodynamics and kinetics were used to study the effect …

Pig Iron vs. Sponge Iron

Pig iron and sponge iron are both intermediate products in the iron and steel manufacturing process, ... This vs. That Explore Comparisons. vs. ... and impurities such as sulfur and phosphorus. It is brittle and cannot be used directly in most applications. On the other hand, sponge iron, also known as direct reduced iron (DRI), is produced by ...

Removal of Phosphorous from Steel Produced by Melting …

A mixture of sponge iron, cast iron & steel scrap can be successfully melted in the furnace lined with MgO based lining. Phosphorous can be removed in IMF by maintaining …

Sponge Iron

Sponge Iron. SIPL is operating 4 x 100 TPD Direct Reduced Iron Rotary Kilns for production of 2000 TPA Sponge Iron at Purulia, using the proven German SL/RN technology. ... Phosphorus and sulphur which cannot be removed in Induction Furnace, can be easily removed in EAF. Phosphorous is removed in the early stage of refining. Sulphur is removed ...

Simultaneous Mixotrophic Nitrate Removal and …

Overall, this study suggests that sponge-iron DNF technology could remove both nitrate and phosphorus, allowing the treatment of municipal wastewater without relying on external carbon sources for deep nitrogen …

Effects of Recycled Sponge Iron on Phosphorus Recovery …

Phosphorus in water not only degrades water quality but also leads to a waste of resources. In this study, adsorption thermodynamics and kinetics were used to study the effect of sponge iron on phosphorus removal, and a filtration bed was used to simulate the phosphorus removal in polluted water.

(PDF) Synergistic Removal of Nitrogen and Phosphorus in …

Sponge iron is a promising material for the removal of phosphorus and nitrogen because of its strong reducing power, high electronegativity, and inexpensive cost.

Study of Phosphorus Removal by Using Sponge Iron …

Study of Phosphorus Removal by Using Sponge Iron …

Phosphorus is one of the key elements caus-ing lake eutrophication. This paper deals with phosphate removal by Sponge iron in batch and fixed-bed opera-tion. Isotherm and kinetic studies are conducted.

Contribution to phosphorus behaviour in steelmaking with sponge iron …

Experiments were conducted in a 70 t UHP electric arc furnace to study the phosphorus behaviour in steelmaking with sponge iron. The proportion of sponge iron in the metallic feed was varied from 52 to 95.4 wt.%. The results are used to show the effect of the sponge iron proportion in the charge on the phosphorus content of the bath.

Enhanced phosphorus removal by microbial-collaborating …

The collaborative and mutually reinforcing phosphorus removal in domestic wastewater in a sponge iron and microorganisms system was studied through a laboratory and a pilot scale …

Microelectrolysis-integrated constructed wetland with sponge iron …

Integrating sponge iron (SI) and microelectrolysis individually into constructed wetlands (CWs) to enhance nitrogen and phosphorus removal are challenged by ammonia (NH 4 +-N) accumulation and limited total phosphorus (TP) removal efficiency, respectively.In this study, a microelectrolysis-assisted CW using SI as filler surrounding the cathode (e-SICW) was …

Effects of Recycled Sponge Iron on Phosphorus Recovery …

Phosphorus in water not only degrades water quality but also leads to a waste of resources. In this study, adsorption thermodynamics and kinetics were used to study the effect of sponge iron on phosphorus removal, and a filtration bed was used to simulate the phosphorus …

What is Sponge Iron? Uses and Benefits Explained

Sponge iron typically contains about 90-94% iron, with the remainder consisting of impurities such as silica, carbon, sulfur, and phosphorus. Its porous structure gives it a high surface area, which makes it an excellent raw material for steelmaking. Applications of Sponge Iron. Sponge iron is primarily used as a feedstock in the production of ...