Charcoal for Water Quality

Carbonized materials can conserve/purify water and air quality. An “old and new” measure that connects the generations.

Carbonized materials can conserve/purify water and air quality. An “old and new” measure that connects the generations.

Nara Tanka Industries is actively involved in using charcoal as an environmental material to adsorb odors from urban rivers, to adsorb toxic substances generated from fossil fuel use, and to clean and purify water in polluted rivers and lakes so that children can play in water environments with peace of mind.

“Unusable land recovery” using charcoal.
Nara Tanka Industries utilizes the natural material of charcoal to contribute to a comfortable and healthy life for the next generation.

Why do water quality and air environments improve with carbon materials?

carbon materials

The internal structure of trees changes when they are carbonized.
The internal surface area (200-300 m2/g) demonstrates its adsorption power.

In relative terms, coniferous forests have an excellent per-unit adsorption capacity. On the other hand, hardwood, particularly hardwood refined at high temperature, has smaller carbonized pore diameters than coniferous wood, but shows excellent shape durability when immersed in liquid (water, etc.). At the same time, many carbonized hardwood materials also have high alkalinity and can be used for preventing oxidation.

The adsorption and decomposition characteristics of coniferous and hardwood carbonized materials depend on differences in each material quality (hole diameter), carbonization temperature (PH, etc.), and components (including trace elements such as calcium and magnesium, in addition to carbon).
Thus, materials should be selected in consideration of various conditions such as the water environment quality, and adsorption characteristics based on carbon material durability.

Results of Water Quality Measurement

*Remainder (white) and exclusion orate (light red) per unit

Item Hard Charcoal Larch Charcoal Nara Charcoal
pll 7.7 7.6 7.7
COD (mg/l) 5.4 6.9 6.3
Exclusion rate (%) 44 29 34
BOD (mg/l) 2.3 2.6 3.2
Exclusion rate (%) 76 73 67
T-N (mg/l) 3.64 4.09 3.71
Exclusion rate (%) 14.4 3.8 12.7
Nll4-N (mg/l) 0.084 0.162 0.115
NO2-N (mg/l) 0.029 0.044 0.035
NO3-N (mg/l) 4.06 4.46 4.21
T-P (mg/l) 0.69 0.74 0.71
Exclusion rate (%) 10.5 4.7 8.7
E. coli (parts/ml) 890 2800 2500
Exclusion rate (%) 81 41 48

Characteristics of Hard Charcoal for Water Purification

A white-charcoal baked product molded from conifers and hardwoods, and carbonized at high temperature. With a fixed carbon ratio of 90% or more and a heavy specific gravity, it easy sinks into water and adsorbs soluble substances in the water, and the microbial film on the surface of the charcoal decomposes organic matter in water to purify the water of rivers, lakes and ponds, etc.

Detailed Results for Agricultural Charcoal

Measures for restoring vegetable production areas, etc.

Charcoal for Water Purification

Rivers, permeable pavement, dams, ponds, and agricultural waterways, etc.

Product Introduction

“Hard” Charcoal for Water Purification (in net bag)

Contents: 10 kg
Characteristics: Hard high temperature carbonization
Carbonized Material: Ogarite
How to Use: About 5 kg-50 kg charcoal per 1 m3 of water
Amount of Charcoal: about 350 kg/m3