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The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.

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Roles of Electrolytes: Calcium and Phosphate

Roles of Electrolytes: Calcium and Phosphate

Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
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Related Experiment Video

Updated: Jul 2, 2026

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

Published on: May 18, 2018

Distribution of phosphorus compounds in corn processing.

H Noureddini¹, M Malik, J Byun

¹Department of Chemical and Biomolecular Engineering, 207H Othmer Hall, University of Nebraska-Lincoln, Lincoln, NE 68588-0643, USA. hnoureddini@unl.edu

Bioresource Technology

|August 12, 2008

Summary

This summary is machine-generated.

Distillers dried grains with solubles (DDGS) and corn gluten feed (CGF) contain high phosphorus (P) levels, primarily as indigestible phytate. This study maps P distribution in ethanol coproducts to aid environmental management and economic viability.

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Last Updated: Jul 2, 2026

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

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Published on: June 16, 2018

Area of Science:

Agricultural Science
Environmental Science
Biochemistry

Background:

Ethanol coproducts like distillers dried grains with solubles (DDGS) and corn gluten feed (CGF) are rich in phosphorus (P).
A significant portion (50-80%) of this phosphorus is phytate, indigestible by nonruminant animals.
Phytate P in animal waste can lead to environmental pollution, necessitating efficient extraction methods.

Purpose of the Study:

To determine the distribution of phosphorus compounds in various streams of dry grind and wet milling ethanol production processes.
To identify key streams for phytate P management and extraction.
To support environmentally compatible ethanol production and coproduct marketing.

Main Methods:

Analysis of phosphorus compound distribution in different process streams.
Quantification of total phosphorus and phosphate forms in dry grind and wet milling operations.

Main Results:

In the dry grind process, condensed distillers solubles (CDS) showed the highest P concentration (1.34 wt.%, db), with 59% as phosphates.
In the wet milling process, light steep water had the highest P concentration (3.4 wt.%, db), with 22% as phosphates.

Conclusions:

Phosphorus distribution varies significantly between dry grind and wet milling processes.
Targeted P management strategies can be developed based on identified high-P streams.
Efficient phytate P extraction from coproducts is crucial for environmental sustainability and economic value in ethanol production.