High-performance phosphorus adsorbent ［PAdeCS］

PAdeCSConsortiumPAdeCSConsortiumNC.E.13.9J1000-a1

Zip-code: 108-0023 NC Shibaura bld. 4-6-14,Shibaura, Minato-ku, Tokyo, Japan

TEL.03-3452-1117 FAX.03-3452-1127E-mail: padecs@star.ncic.co.jp

Secretariat

NIPPON CONCRETE INDUSTRIES CO.,LTD.Environmental Division

TEL.03-3452-1116 FAX.03-3452-1127E-mail : nc@star.ncic.co.jp

Contact us

Partners

Major partners

Supporting partners

The development of PAdeCS was financially supported by the New Energy and Industrial Technology Development Organization (NEDO) and the Ministry of Land, Infrastructure, Transport and Tourism of Japan.Collaborators: Nippon Concrete Industries Co., Ltd., Prof. Yukio Yanagisawa (The University of Tokyo), Prof. Akihiro Yamasaki (Seikei University), and Atsushi Iizuka (Tohoku University)

PAdeCSConsortium

Nippon Concrete Industries Co., Ltd.Nihon Network Support Co., Ltd.

Hokkaido Concrete Industries Co. Ltd.Kyushu Kouatsu Concrete Industries Co. Ltd.

Nihonkai Concrete Industries Co. Ltd.Chugoku Kouatsu Concrete Industries Co. Ltd.

Taiheiyo Cement Corp.Nikko Co. Ltd.

◆ This catalog was produced in May 2012 ◆ Colors of products may differ slightly because of the printing process.◆ This catalog contains image pictures. That may differ from actual materials. ◆ Catalog contents and product descriptions may be changed without prior announcement. ＊ JOGMEC (Japan Oil, Gas and Metals National Corporation), The material flow of mineral resources 2011

High-performancephosphorus adsorbent

［PAdeCS］

High-performancephosphorus adsorbent

［PAdeCS］

High-performancephosphorus adsorbent

［PAdeCS］Our overall aim is to promote and increase recycling of the phosphate rock resources that have accumulated over the 4.6 billion years of the Earth’s history. To contribute to our overall aim, we recommend a newly developed concrete sludge system, specifically manufactured for recycling phosphorus.

Steps in the producing processPAdeCS

CaCO3

(calcium carbonate)

water content: 25–30 %（　　　　 ）

Good quality phosphorus ore is not produced in Japan, so all Japan’ s required phosphorus has to be imported. Phosphorus ore is now only produced in a limited number of countries (e.g., Mo-rocco, China and the United States). It is estimated that the world’ s phosphorus resources will be exhausted within several decades. On one hand, there is already concern regarding the secu-rity of phosphorus supplies, which has been accompanied by rising ore prices in recent years. On the other hand, up until now, there has been limited phosphorus recovery from unused or little-used domestic waste streams and other phosphorus resources, even though large amounts of phosphorus accumulate in sewage and lake sediments. The issue of phosphorus recovery and recycling from domestic waste streams and other sources therefore requires urgent attention.

Background

Stage in the concrete sludge treatment method・Problems

■ Saves on the costs of treating industrial concrete sludge■ Eliminates a conventional sludge water neutralization process ■ Decreases greenhouse gas emissions by using CO2 for neutralization

■ The solid part of concrete sludge needs to be treated as an industrial waste, which can be expensive.■ The liquid part of the concrete sludge should be neutralized by strong acid and then discharged.

※PAdeCS is an abbreviation for Phosphorus Adsorbent derived from Concrete Sludge.

concrete sludge

Stages in the concrete sludge treatment method

Problems

sludge maintained in aliquid form by stirring

solid/liquidseparation

neutralization discharge

disposal

solidified concrete sludge

concretesludge

reservoir

extraction reactor(sludge+water)

solid/liquid separator

pulverizer filtered solution reservoir

MMM

MM

precipitationreactor

exhaust gascontaining

carbondioxide

CaCO3

(calcium carbonate)

concrete sludge

sewage sludge plant

inland freshwater bodies

calcium carbonate products Phosphoric acid plant

livestockboiler exhaust gas

(phosphorus ore substitute)

PAdeCSBenefits of implementing the producing technology

(high-performance phosphorus adsorbent) and calcium carbonate (with a purity of more than 95%) are produced by using concrete sludge, water and carbon dioxide at ordinary temperatures and pressures.PAdeCS

PAdeCS

※PAdeCS is a registered trademark

POdeCS

PAdeCS

PAdeCS(High-performance phosphorus adsorbent)

Phosphorus concentration less than 1mg-P/L after 1h

Phos

phor

us c

once

ntra

tion

[mg-

P/L]

elapsedtime[h]0

0

5

10

15

20

1 2 3 4 5Time series of phosphorus concentrations after addition of PAdeCS granules

Phosphorus recovery from waste water using . (Waste water was collected from a treatment plant in Ibaraki Prefecture, Japan, and the experiment was carried out in our laboratory. amount: 2.0 g/L, size: 53–106 μm)

phosphatefertilizer17.8%（48）

compound fertilizer61.2%（165）

inorganicreagents20.8%（56）

Phosphoric acid, red phosphorus, phosphates etc. (in food additives, medical chemicals, resin stabilizer, mineral dressing reagents etc.)

※numbers shown in parenthesis 　are phosphorus element 　equivalent weights in 103 t

Phosphorus use in Japan.

China31.5%

United States18.8%Morocco 15.5%

Russia 6.5%

Tunisia 5.0%

Others22.7%

Major phosphorus ore producing countries

PAdeCS PAdeCS

PAdeCS

＊ Cited and translated from a report by JOGMEC. ＊ Cited and translated from a report by JOGMEC.

Phosphorus is one of the essential elements for living things, and is found in agricultural

crops, human tissue, marine products, animals and plants. Human bones and teeth

contain phosphorus as calcium phosphates. Phosphorus is one of the three essential

fertilizers needed for agriculture.

To meet the needs of agriculture, huge amounts of phosphate fertilizer have been

produced and consumed worldwide. Fertilizer is produced from phosphorus ores, 90% of

which are marine deposits of phosphate derived from phosphoric salts or seabird

droppings. A good quality phosphorus ore is defined as having a phosphorus content

greater than 30% as P2O5. Unfortunately Japan does not have any ‘good quality’ ore

stocks, and so all Japan’ s phosphorus requirements have to be imported.

In nature, the solubility of phosphate in water is low. Phosphorus is slowly released from

rocks by weathering and dissolution. As such, the phosphate supply is controlled by

natural processes, and these processes have not been sufficiently rapid to meet

phosphorus demands over the long history of human agriculture. Furthermore, because

of the depletion of phosphorus resources worldwide, and export limits imposed by the

principal producing countries, there is an increasing need to explore phosphorus recovery

from domestic wastewater streams and other phosphate resources (e.g. lake sediments).

If recovered phosphorus can successfully be used for industrial purposes, it will

significantly increase the profile of phosphorus recycling.

Our aim is to contribute to solving the problem of global phosphorus resource depletion and to develop high-efficiency systems to recover phosphorus from waste streams.

A complete concrete sludge recycling process using carbon dioxide, which produces calcium carbonate and a high-performance phosphorus adsorbent material (PAdeCS )Greenhouse gas emission reduction and phosphorus resource recovery and recyclingPlays a role in developing a recycling society by producing an al-ternative to phosphorus ore from unused phosphorus resources, such as phosphorus that is accumulating in sewage sludge plants.

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■

■

※

■ Produced from a concrete sludge that consists of water and cement, which means that it is a safe, secure and economical phosphorus adsorbent.

■ Particle size of can be adjusted depending on the application. It is easy to handle, and can be supplied in large quantities.■ Can rapidly recover inorganic phosphate ions from waste water when added at a ratio of 0.2 wt %.■ After phosphorus adsorption, ( ) can be used as a phosphorus ore substitute.■ Can be used to prevent blue-green algae growth in inland freshwater bodies. ■ has ion-exchange ability, and can be used to recover heavy metals from industrial effluent.

PAdeCS

PAdeCSCharacteristics of

PAdeCS

POdeCS

POdeCS

Material flow of and calcium carbonatePAdeCS