Removal of nitrogen and phosphate from wastewater by addition of bittern

Lee, S.I; Weon, Seung-Yeon; Lee, C.W; Koopman, Ben

doi:10.1016/s0045-6535(02)00807-x

Cited by 219 publications

(106 citation statements)

References 15 publications

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“…Using renewable resources for contaminant removal through adsorption is becoming more cost-effective method. Some materials have been tested for this purpose, such as sepiolite [11], bittern [12], clinoptilolite [13][14] hardwood mulch [15], and sawdust [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Nutrients from Stormwater Using Sawdust

Harmayani¹,

Anwar²

2012

IJESD

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Section: Introductionmentioning

confidence: 99%

Adsorption of Nutrients from Stormwater Using Sawdust

Harmayani¹,

Anwar²

2012

IJESD

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“…Actually, phosphorus removal techniques fall into three main categories: physical, chemical and biological (Wang, et al, 2006). Among them, chemical removal techniques, using metal salts, are reliable and well-established processes (Yeoman, et al, 1988;Wang, et al, 2005 andLee, et al, 2003). Chemically, phosphate is most commonly removed by precipitation.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus removal in low alkalinity secondary effluent using alum

Banu

Yeom

2007

Int. J. Environ. Sci. Technol.

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ABSTRACT:The alkalinity plays an important role in phosphorus removal using coagulant. The dosage of coagulant in the low alkalinity wastewater is limited due to rapid pH changes. In the present study, a series of jar test was conducted using low alkalinity wastewater (50 mg/L) to evaluate the optimum pH, dosage and performance parameters (slow mixing and settling time) for the common coagulant alum. From the experiment, it was found that the dosage of coagulant and removal of phosphorus depend upon the pH of the wastewater after adding coagulant. The final optimum pH for efficient P removal was found to be within the range of 5.7-5.9. This range acts as an indicator and it is the maximum tolerable pH range for phosphorus removal for low alkalinity wastewater. The optimum time for slow mix and settling was found to be 20 min. The optimum mole ratio of alum to remove one mole of phosphorous was found to be 2.3. The alum coagulation at pH 7 produced effluent with the total residual phosphorus and reactive phosphorus content of 0.3 and 0.9 mg/L, respectively.

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“…The formation of these products removes some of the Mg 2+ and PO 4 3− available for struvite crystallization, therefore, an overdose of reagents is necessary. In further researches, the benefit of overdosing magnesium and phosphorus was verified [18,19,32]. Clearly, the optimal dosages reported in the literature are related to many factors, such as the characteristics of treated wastewaters, the exploited reactants, and the applied process conditions.…”

Section: Struvite Productionmentioning

confidence: 93%

Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition

et al. 2016

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Abstract:The treatment of landfill leachate, due to its great polluting load, is a very difficult task. In particular, the abatement of high ammonium concentrations represents one of the main issues. Among the available techniques, struvite precipitation is an effective method for the removal and recovery of NH 4 + load. However, due to the lack of phosphorus and magnesium amounts, the struvite formation results in an expensive process in the leachate treatment. To overcome this issue, in the present work, we developed a simple and suitable method for ammonium removal by the multiple recycling of struvite decomposition residues. In this regard, a procedure for acid dissolution of struvite, produced by using industrial grade reagents, was initially defined. The effect of pH, temperature, and acid type was investigated. The experimental results proved the effectiveness of both hydrochloric and acetic acid, which allow a high and selective release of ammonium at T = 50 • C and pH = 5.5. The multiple reuse of decomposition products, combined with the supplementation of a small quantity of phosphorus and magnesium at molar ratios of n(N):n(Mg):n(P) = 1:0.05:0.05, guarantees stable NH 4 + abatement of about 82%. The proposed process allows a cost saving of around to 74% and can be easily applied in industrial treatment plants.

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Removal of nitrogen and phosphate from wastewater by addition of bittern

Cited by 219 publications

References 15 publications

Adsorption of Nutrients from Stormwater Using Sawdust

Adsorption of Nutrients from Stormwater Using Sawdust

Phosphorus removal in low alkalinity secondary effluent using alum

Ammonium Removal from Landfill Leachate by Means of Multiple Recycling of Struvite Residues Obtained through Acid Decomposition

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