bauxite residue compost
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bauxite residue compost

Zinc forms in compost and red mud-amended bauxite residue ...

Aug 13, 2010  Re-vegetation is the preferred long-term practice for managing Alcoa’s bauxite-processing residue storage areas. Residue sand is the primary growth medium for rehabilitation; however, it is largely nutrient deficient. Although addition of organic and inorganic amendments can provide short-term supply of plant-available nutrients, but quickly exhausted, thus long-term

Physico‐chemical changes in bauxite residue following ...

Physical properties exhibited by unvegetated mine wastes pose limitations to vegetation establishment and growth. In an attempt to promote vegetation cover on bauxite residue, a field trial was established to determine the effect of spent mushroom compost (SMC) and gypsum amendment on enhancing the physical properties of the residue.

Zinc forms in compost and red mud-amended bauxite residue sand

Three compost mixtures (piggery, biosolid and commercial compost), three rates of application (0, 10 and 50 t ha−1) were taken as organic amendments and incubated with residue sand for 30 days ...

Changes in distribution and microstructure of bauxite ...

Apr 01, 2019  Growth and nutrition of Holcus lanatus in bauxite residue amended with combinations of spent mushroom compost and gypsum Land Degrad. Dev. , 23 ( 2012 ) , pp. 144 - 149

Growth and nutrition of Holcus lanatus in bauxite residue ...

In order to test the effectiveness of amendments at promoting revegetation, bauxite resid... Growth and nutrition of Holcus lanatus in bauxite residue amended with combinations of spent mushroom compost and gypsum - Courtney - 2012 - Land Degradation amp; Development - Wiley Online Library

Insight of soil amelioration process of bauxite residues ...

It aimed to investigate and evaluate the soil amelioration process of bauxite residues with the amendments of organic materials from different sources. Wheat straw, poultry manure compost, and biosolids were chosen as the added organic materials. A series of essential soil properties were analyzed to evaluate the effects of organic materials on the soil amelioration of bauxite residue.

Zinc forms in compost and red mud-amended bauxite residue ...

Purpose: Re-vegetation is the preferred long-term practice for managing Alcoa's bauxite-processing residue storage areas. Residue sand is the primary growth medium for rehabilitation; however, it is largely nutrient deficient. Although addition of organic and inorganic amendments can provide short-term supply of plant-available nutrients, but quickly exhausted, thus long-term deficiencies are ...

Effect of amendment of bauxite processing sand with ...

Nov 01, 2010  The effects of addition of a range of organic amendments (biosolids, spent mushroom compost, green waste compost and green waste-derived biochar), at two rates, on some key chemical, physical and microbial properties of bauxite-processing residue sand were studied in a laboratory incubation study.

Addition of an organic amendment and/or residue mud to ...

Mar 01, 2012  The effects of addition of carbonated residue mud (RMC) or seawater neutralized residue mud (RMS), at two rates, in the presence or absence of added green waste compost, on the chemical, physical and microbial properties of gypsum-treated bauxite residue sand were studied in a laboratory incubation study.

Zinc forms in compost and red mud-amended bauxite residue ...

Purpose: Re-vegetation is the preferred long-term practice for managing Alcoa's bauxite-processing residue storage areas. Residue sand is the primary growth medium for rehabilitation; however, it is largely nutrient deficient. Although addition of organic and inorganic amendments can provide short-term supply of plant-available nutrients, but quickly exhausted, thus long-term deficiencies are ...

Insight of soil amelioration process of bauxite residues ...

It aimed to investigate and evaluate the soil amelioration process of bauxite residues with the amendments of organic materials from different sources. Wheat straw, poultry manure compost, and biosolids were chosen as the added organic materials. A series of essential soil properties were analyzed to evaluate the effects of organic materials on the soil amelioration of bauxite residue.

Zinc forms in compost and red mud-amended bauxite residue ...

Zinc forms in compost and red mud-amended bauxite residue sand . By C. Thiyagarajan, R.W. Bell, J.D. Anderson and I. Phillips. Abstract. Purpose: Re-vegetation is the preferred long-term practice for managing Alcoa's bauxite-processing residue storage areas. Residue sand is the primary growth medium for rehabilitation; however, it is largely ...

Physico-chemical changes in bauxite residue following ...

Physical properties exhibited by unvegetated mine wastes pose limitations to vegetation establishment and growth. In an attempt to promote vegetation cover on bauxite residue, a field trial was established to determine the effect of spent mushroom compost (SMC) and gypsum amendment on enhancing the physical properties of the residue. SMC was incorporated at rates of 0, 60, 80 and 120 t ha-1 ...

Bacterial communities established in bauxite residues with ...

bauxite ores and is commonly deposited in impoundments. These sites represent 50 hostile environments with increased salinity and alkalinity and little prospect of re-vegetation when left untreated. This study reports the establishment of bacterial communities in bauxite residues with and without restoration amendments (compost

Red mud - Wikipedia

Red mud, preferably known as bauxite residue, is an industrial waste generated during the processing of bauxite into alumina using the Bayer process.It is composed of various oxide compounds, including the iron oxides which give its red colour. Over 95% of the alumina produced globally is through the Bayer process; for every tonne of alumina produced, approximately 1 to 1.5 tonnes of red mud ...

Sustained Bauxite Residue Rehabilitation with Gypsum and ...

Bauxite residue is a high volume byproduct of alumina manufacture which is commonly disposed of in purpose-built bauxite residue disposal areas (BRDAs). Natural waters interacting with bauxite residue are characteristically highly alkaline, and have elevated concentrations of Na, Al, and other trace metals. Rehabilitation of BRDAs is therefore often costly and resource/infrastructure intensive ...

1, 3, Curtin, T. 2, 3, Pawlett, M4 Courtney, R.

Bauxite residue is the waste by-product generated by the extraction of alumina from bauxite ore via the Bayer Process. The annual global production of bauxite residue is about 120 million tonnes, with an estimated global stockpile of 3 billion tonnes (Klauber et al. 2011).

ARTICLE: Addressing the Challenge of Bauxite Residue ...

Mar 11, 2019  The bauxite residue is thickened to a high-density slurry using an advanced thickener, flocculation, and dewatering filtration technologies. The thickened red mud slurry is pumped via pipeline to the storage area and spread in layers, allowing it to de-water through a combination of drainage and evaporative drying.

List of Residual Waste Beneficial Use General Permits

The beneficial uses of the finished compost approved in this permit are for use, marketing or distribution as a soil conditioner, soil amendment, fertilizer, mulch or for erosion control. ... Beneficial use of bauxite residue as a filtration aid in natural engineered wastewater treatment (NEWT)

Bacterial Communities Established in Bauxite Residues with ...

Bauxite residue is the alkaline byproduct generated when alumina is extracted from bauxite ores and is commonly deposited in impoundments. These sites represent hostile environments with increased salinity and alkalinity and little prospect of revegetation when left untreated. This study reports the establishment of bacterial communities in bauxite residues with and without restoration ...

Bauxite residue uses: successes, failures and

16 Scale of the problem • Alumina production in 2015 was 115 million t/y - 95% via Bayer process • Bauxite residue produced per tonne of alumina –range 0.5 to 4 t/t alumina • Annual arising –over 155 million tonnes and growing • Number of active alumina refineries –about 80 • Number of closed residue disposal sites –over 50 • All disposal in estuaries and the sea ceased at ...

Mining and Refining – Bauxite Residue Management

It is primarily composed of the insoluble fraction of the bauxite ore that remains after extraction of the aluminium-containing components. Iron oxides (10 – 30%), titanium dioxide (2 – 15%), silicon oxide (5 – 20%) and undissolved alumina (0 – 20%) make up the residue, together with a wide range of other oxides which will vary according to the initial bauxite source.

Effect of amendment of bauxite processing sand with ...

The effects of addition of a range of organic amendments (biosolids, spent mushroom compost, green waste compost and green waste-derived biochar), at two rates, on some key chemical, physical and microbial properties of bauxite-processing residue sand were studied in a laboratory incubation study.

Bacterial communities established in bauxite residues with ...

bauxite ores and is commonly deposited in impoundments. These sites represent 50 hostile environments with increased salinity and alkalinity and little prospect of re-vegetation when left untreated. This study reports the establishment of bacterial communities in bauxite residues with and without restoration amendments (compost

Physico-chemical changes in bauxite residue following ...

Physical properties exhibited by unvegetated mine wastes pose limitations to vegetation establishment and growth. In an attempt to promote vegetation cover on bauxite residue, a field trial was established to determine the effect of spent mushroom compost (SMC) and gypsum amendment on enhancing the physical properties of the residue. SMC was incorporated at rates of 0, 60, 80 and 120 t ha-1 ...

Can organic amendments be used to improve the properties ...

composts is likely to improve the properties of residue sand as a growth medium during revegetation. Key Words Residue sand, biosolids, biochar, compost Introduction Alumina is extracted from bauxite by the Bayer Process and the material remaining (bauxite-processing residue) is disposed-of in large residue drying areas (RDAs) in a semi-dry state.

Soil quality and vegetation performance indicators for ...

Bauxite residue is the by-productgenerated by the extractionof alumina from bauxite ore via the Bayer process (i.e. using concentrated sodium hydroxide at high temperature and pressure) and is typically highly alkaline, saline, and sodic and may contain trace elements at elevated levels (Power et al. 2011). The alumina industry produces ~150 ...

Mining and Refining – Bauxite Residue Management

It is primarily composed of the insoluble fraction of the bauxite ore that remains after extraction of the aluminium-containing components. Iron oxides (10 – 30%), titanium dioxide (2 – 15%), silicon oxide (5 – 20%) and undissolved alumina (0 – 20%) make up the residue, together with a wide range of other oxides which will vary according to the initial bauxite source.

Sustained Bauxite Residue Rehabilitation with Gypsum and ...

Bauxite residue is a high volume byproduct of alumina manufacture which is commonly disposed of in purpose-built bauxite residue disposal areas (BRDAs). Natural waters interacting with bauxite residue are characteristically highly alkaline, and have elevated concentrations of Na, Al, and other trace metals. Rehabilitation of BRDAs is therefore often costly and resource/infrastructure intensive ...

Bauxite residue uses: successes, failures and

16 Scale of the problem • Alumina production in 2015 was 115 million t/y - 95% via Bayer process • Bauxite residue produced per tonne of alumina –range 0.5 to 4 t/t alumina • Annual arising –over 155 million tonnes and growing • Number of active alumina refineries –about 80 • Number of closed residue disposal sites –over 50 • All disposal in estuaries and the sea ceased at ...

ARTICLE: Addressing the Challenge of Bauxite Residue ...

Mar 11, 2019  The bauxite residue is thickened to a high-density slurry using an advanced thickener, flocculation, and dewatering filtration technologies. The thickened red mud slurry is pumped via pipeline to the storage area and spread in layers, allowing it to de-water through a combination of drainage and evaporative drying.

List of Residual Waste Beneficial Use General Permits

The beneficial uses of the finished compost approved in this permit are for use, marketing or distribution as a soil conditioner, soil amendment, fertilizer, mulch or for erosion control. ... Beneficial use of bauxite residue as a filtration aid in natural engineered wastewater treatment (NEWT)

Bauxite Management - RG Recycling Group Ltd

– Bauxite residue can also be used for things such as bricks and tiles, which means that it could eventually be a useful product for the construction industry. If bauxite is disposed of correctly, then there should be no need for concern, as the risk to safety should be minimal. However, there is certainly no room for complacency when it ...

INVESTIGATION OF ENVIRONMENTAL IMPACTS OF

without vegetation, plot 2 is 90% coal refuse mixing with 10% bauxite residue in the amended zone and vegetation on the top 61 cm, plot 3 is 85% coal refuse mixing with 10% coal refuse and 5% mushroom compost and vegetation on the top 91 cm, plot 4 is 70% coal refuse mixing with 30% limestone and vegetation on the top 61 cm. The

Bacterial communities established in bauxite residues with ...

Bauxite residue is the alkaline byproduct generated when alumina is extracted from bauxite ores and is commonly deposited in impoundments. These sites represent hostile environments with increased salinity and alkalinity and little prospect of revegetation when left untreated. ... (compost and gypsum addition, revegetation) in samples taken in ...

CSIRO PUBLISHING Soil Research

Bauxite residue is the by-product generated by the extraction of alumina from bauxite ore via the Bayer process (i.e. using concentrated sodium hydroxide at high temperature and pressure) and is typically highly alkaline, saline, and sodic and may contain trace elements at elevated levels (Power et al. 2011).The alumina industry produces ~150 million tonnes of bauxite residue each year with an ...

Effect of a commercial peat moss-shrimp wastes compost on ...

Abstract Revegetation of red mud can be difficult without chemical or organic ameliorant for red mud. A greenhouse experiment was conducted to examine the short-term effect of a commercial peat moss-shrimp wastes compost on the growth of pucinellia (Pucinellia distorts L.) in a bauxite residue (red mud) from the Alcan's Vaudreuil alumina refinery at Jonquière (Québec), Canada.

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