Phosphorus Removal and Recovery in Novel Seed Crystal Media Filter

A seed crystal medium was developed from the powder steel slag and other material in order to carry out a novel method for phosphorus removal and recovery through the crystallization process. Continuous-flow fixed-bed column experiment was conducted to investigate the phosphorus removal capacity with low P concentration (10mg/L), and the influences of HRT, Ca/P ratio and pH on the treatment efficiency were also considered. It was observed that the P concentration of filter effluent was always lower than 0.5mg/L whether under the experimental condition of pH=7 and HRT=60 min or the condition of pH=7, HRT=30min and the Ca/P ratio = 1.5. With the HRT 30min, increasing pH to 7.5 and decreasing Ca/P ratio to 1, the P concentration of filter effluent was still lower than 0.5mg/L. The XRD analysis of the sediment obtained from the filter bed proved that product formed in the phosphorus removal process was Hydroxyapatite (HAP), illustrated that the crystallization occurred in the process of P-removal. The results of this study suggest that the fixed bed - phosphorus crystallization process with seed crystal media is a promising technique for phosphorus removal and recovery.

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Performance and Influencing Factors of Phosphorus Removal in Two BAFs with Artificial Crystal Seed Media

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.777.112 ◽

2013 ◽

Vol 777 ◽

pp. 112-116 ◽

Cited By ~ 1

Author(s):

Jin Feng Meng ◽

Li Ping Qiu ◽

Jia Bin Wang ◽

Kai Huang ◽

Dong Wang ◽

...

Keyword(s):

Phosphorus Removal ◽

Steel Slag ◽

Xrd Analysis ◽

Phosphorus Concentration ◽

Reaction Products ◽

Treatment Performance ◽

Base Composite ◽

Ph Range ◽

Crystal Seed ◽

Removal And Recovery

The phosphorus removal from low concentration phosphorus wastewater in two BAFs with different artificial crystal seed meida and the influence of HRT, Ca/P and pH on the treatment performance were investigated. The results showed that the artificial crystal media BAFs was more efficient than that of the current commercial filter media for phosphorus removal and recovery, and the suitable pH range of wastewater was also enlarged. When the initial phosphorus concentration was 10 mg/L, the optimum operational condition of steel slag base composite meida filter was HRT=30 min, n (Ca)/n (P)=1 and pH=8, as well as the optimum condition of water slag base composite media filter was HRT=60 min, n (Ca)/n (P)=2.5 and pH=8. XRD analysis showed that the reaction products of phosphorus removal by the two artificial crystal seed media filters were all hydroxy calcium phosphate, but its crystallinity was not high, which might due to the production of calcium carbonate in the reaction of phosphorus removal simultaneously.

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Phosphorus removal and recovery from fosfomycin pharmaceutical wastewater by the induced crystallization process

Journal of Environmental Management ◽

10.1016/j.jenvman.2018.10.036 ◽

2019 ◽

Vol 231 ◽

pp. 207-212 ◽

Cited By ~ 6

Author(s):

Meigui Yang ◽

Jing Shi ◽

Zhengwen Xu ◽

Siyi Zhu ◽

Yixin Cui

Keyword(s):

Phosphorus Removal ◽

Crystallization Process ◽

Pharmaceutical Wastewater ◽

Induced Crystallization ◽

Removal And Recovery

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Kinetics and Thermodynamics of Efficient Phosphorus Removal by a Composite Fiber

Applied Sciences ◽

10.3390/app9112220 ◽

2019 ◽

Vol 9 (11) ◽

pp. 2220 ◽

Cited By ~ 4

Author(s):

Yan Liu ◽

Xiao Hu

Keyword(s):

Phosphorus Removal ◽

Municipal Wastewater ◽

Steel Slag ◽

Fixed Bed ◽

Treatment Plant ◽

Composite Fiber ◽

Fixed Bed Reactor ◽

Maximum Adsorption Capacity ◽

Enthalpy Of Reaction ◽

Kinetics And Thermodynamics

In the current study, we investigated the kinetics and thermodynamics of phosphorus removal by zeolite/steel slag/fly ash/basalt (ZSFB) composite fiber. Kinetic analysis indicated that the adsorption of phosphorus is best fitted with the pseudo-second-order model. The maximum adsorption capacity of the fiber calculated by the Langmuir model was found to be 4.18 mg/g and the partition coefficient was 1.49 mg/g/µM. Thermodynamics results revealed that the Gibbs free energy ΔG0 of the composite fiber was negative, indicating that the adsorption is a spontaneous process; the standard enthalpy of reaction ΔH0 was positive, indicating that the adsorption is endothermic. Adsorption under different influencing factors and desorption experiments were conducted to investigate the phosphorus removal characteristics of ZSFB composite fiber. Dynamic adsorption and the phosphorus removal experiment were also conducted in a fixed-bed reactor to study factors affecting the time of breakthrough. Results indicate that the performance of ZSFB composite fiber was not relatively outstanding compared with nanomaterials and magnetic composites. However, its performance has already met the class A demands of “discharge standard of pollutants for municipal wastewater treatment plant” (GB18918-2002) which means it can be applied to remove phosphorus from real wastewater in a cost-effective way with low-priced raw materials.

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Phosphorus removal and recovery from high phosphorus wastewater by the HAP crystallization process

Oriental Journal Of Chemistry ◽

10.13005/ojc/320125 ◽

2016 ◽

Vol 32 (1) ◽

pp. 235-241 ◽

Cited By ~ 3

Author(s):

Yu Menglin ◽

Yin Danyang ◽

Shi Jing ◽

Song Duanmei ◽

Xu Zhengwen

Keyword(s):

Phosphorus Removal ◽

Crystallization Process ◽

High Phosphorus ◽

Removal And Recovery

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An approach for phosphate removal with quartz sand, ceramsite, blast furnace slag and steel slag as seed crystal

Water Science & Technology ◽

10.2166/wst.2012.931 ◽

2012 ◽

Vol 65 (6) ◽

pp. 1048-1053 ◽

Cited By ~ 8

Author(s):

Liping Qiu ◽

Guangwei Wang ◽

Shoubin Zhang ◽

Zhongxi Yang ◽

Yanbo Li

Keyword(s):

Blast Furnace ◽

Quartz Sand ◽

Blast Furnace Slag ◽

Steel Slag ◽

Complete Removal ◽

Xrd Analysis ◽

Phosphate Concentration ◽

Seed Crystal ◽

Phosphate Removal ◽

Furnace Slag

The phosphate removal abilities and crystallization performance of quartz sand, ceramsite, blast furnace slag and steel slag were investigated. The residual phosphate concentrations in the reaction solutions were not changed by addition of the ceramsite, quartz sand and blast furnace slag. The steel slag could provide alkalinity and Ca2+ to the reaction solution due to its hydration activity, and performed a better phosphate removal performance than the other three. Under the conditions of Ca/P 2.0, pH 8.5 and 10 mg P/L, the phosphate crystallization occurred during 12 h. The quartz sand and ceramsite did not improve the phosphate crystallization, but steel slag was an effective seed crystal. The phosphate concentration decreased drastically after 12 h after addition of steel slag, and near complete removal was achieved after 48 h. The XRD analysis showed that the main crystallization products were hydroxyapatite (HAP) and the crystallinity increased with the reaction time. Phosphate was successfully recovered from low phosphate concentration wastewater using steel slag as seed material.

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Phosphate Removal and Recovery with Seed Crystals in Low Concentrated Phosphate Wastewater

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.374-377.865 ◽

2011 ◽

Vol 374-377 ◽

pp. 865-868 ◽

Cited By ~ 2

Author(s):

Li Ping Qiu ◽

Guang Wei Wang ◽

Shou Bin Zhang ◽

Tao Yu

Keyword(s):

Reaction Time ◽

Blast Furnace Slag ◽

Steel Slag ◽

Xrd Analysis ◽

Phosphate Concentration ◽

Phosphate Removal ◽

Reaction Conditions ◽

Seed Crystals ◽

Furnace Slag ◽

Removal And Recovery

The phosphate removal and recovery from lower concentrated phosphate wastewater with the quartz sand, ceramsite, blast furnace slag and steel slag as seed crystals were investigated. The results showed that the steel slag performed a better phosphate removal performance than the other threes. The phosphate crystallization occurred under the reaction conditions of Ca/P 2.0, pH 9.0, phosphate concentration 10 mg/L and reaction time 12h. The steel slag could be employed as an effective seed crystal, of which the phosphate concentration decreased drastically in 12h and almost had been removed completely in 48h. The XRD analysis showed that the main crystallization products were hydroxyapatite (HAP) and the crystallinity increased with the reaction time.

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Acid red G dye removal from aqueous solutions by porous ceramsite produced from solid wastes: Batch and fixed-bed studies

Green Processing and Synthesis ◽

10.1515/gps-2020-0068 ◽

2020 ◽

Vol 9 (1) ◽

pp. 770-782

Author(s):

Tianpeng Li ◽

Jing Fan ◽

Tingting Sun

Keyword(s):

Aqueous Solutions ◽

Dye Removal ◽

Coal Fly Ash ◽

Exothermic Reaction ◽

Fixed Bed ◽

Column Experiment ◽

Solid Wastes ◽

Order Kinetic ◽

Cost Effective Treatment ◽

Acid Red G

AbstractA novel porous ceramsite was made of municipal sludge, coal fly ash, and river sediment by sintering process, and the performance of batch and fixed-bed column systems containing this material in the removal of acid red G (ARG) dye from aqueous solutions was assessed in this study. The results of orthogonal test showed that sintering temperature was the most important determinant in the preparation of porous ceramsite, and it possesses developed pore structure and high specific surface area. Batch experiment results indicated that the adsorption process of ARG dye toward porous ceramsite was a spontaneous exothermic reaction, which could be better described with Freundlich–Langmuir isotherm model (R2 > 0.992) and basically followed the pseudo-first-order kinetic equation (R2 > 0.993). Column experiment results showed that when the porous ceramsite was used as packing material, its adsorption capacity was roughly improved by 3.5 times compared with that in batch system, and the breakthrough behavior was simulated well with Yoon–Nelson model, with R2 > 0.954. This study suggested that the novelty man-made porous ceramsite obtained from solid wastes might be processed as a certain cost-effective treatment material fit for the dye removal in aqueous solutions.

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Phosphorus removal enhancement by porous adsorptive mortar using miscanthus and steel slag for highly adsorptive concrete

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.123686 ◽

2021 ◽

Vol 295 ◽

pp. 123686

Author(s):

Fan Wu ◽

Qingliang Yu ◽

H.J.H. Brouwers

Keyword(s):

Phosphorus Removal ◽

Steel Slag

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Selective removal and recovery of phosphate in a novel fixed-bed process

Water Science & Technology ◽

10.2166/wst.1996.0670 ◽

1996 ◽

Vol 33 (10-11) ◽

pp. 139-147 ◽

Cited By ~ 10

Author(s):

Dongye Zhao ◽

Arup K. Sengupta

Keyword(s):

Industrial Wastewater ◽

Laboratory Experiments ◽

Fixed Bed ◽

Sorption Process ◽

Selective Removal ◽

Synthetic Wastewater ◽

Chelating Polymer ◽

Efficient Regeneration ◽

Polymeric Ligand ◽

Removal And Recovery

This paper reports salient features of a new fixed-bed sorption process in regard to ultimate removal and recovery of phosphate from municipal and industrial wastewater. The sorbent, referred to as polymeric ligand exchanger(PLE), is essentially a copper(II) loaded specialty chelating polymer. Laboratory experiments have demonstrated that the PLE: can remove phosphate selectively from municipal and synthetic wastewater; is amenable to efficient regeneration; and provides opportunities to recover phosphate and reuse the spent regenerant for multiple numbers of cycles.

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