Sludge Recycling ｜テクニカ合同株式会社

Sludge recycling business

Our company sells various chemical products and machine brands utilized by Japan Regenerate Soil Association, a member association in which Technica participates as a supporting member, offers development proposals such as environmental projects, provides technical assistance to association members, and promotes new partner expansion.

Recycling is a service that does not discard inorganic sludge generated in association with construction projects, excavation, and jacking work as waste, but rather reuses such sludge as “Uni-Soil,” a high-strength material subjected to intermediate processing.

Our epoch-making system achieves “zero-emission recycling,” producing not a single waste product, such as the wastewater normally generated during intermediate processing.

Special Features of Uni-Soil

Immediately forms granules with water content from sludge having a high volume of particulates
Does not require dehydration processing (discharge/wastewater not required)
Provides compact planting (moveable)
Industrial waste permit already acquired
Provides a granulized product of stable quality
Recycles into multipurpose material (engineering and agricultural material)
Low cost (facility, maintenance, running)

Sludge Treatment Flow

Granulating System

Examples of Uni-Soil use

Embankment material

Bed material

Grass inhibiting material

Backfilling material

Uni-Soil Registration and Usage

Safety of Hardrop

Hazardous Material Elution Test Results of Hardrop (Excerpt)

mg/l	Cadmium	Total Cyanide	Organophosphor	Lead	Hexavalent Chromium	Arsenic	Total Mercury	Alkyl Mercury	PCB
Hardrop	Less than 0.001	Not detected	Not detected	Less than 0.001	Less than 0.005	Less than 0.001	Less than 0.0005	Not detected	Not detected
Environmental Agency Notification 46*	0.01 or less	Shall not be detected	Shall not be detected	0.01 or less	0.05 or less	0.01 or less	0.0005 or less	Shall not be detected	Shall not be detected

*Notification 46 of the Environmental Agency, “Soil Environmental Standards”

Representative Property Values of Uni-Soil

		Applicable Range	Pit Sand	Uni-Soil	Remarks
Viscosity characteristics	Uc Uniformity coefficient Uc' Curvature coefficient	10 or higher 1-√Uc	1.0-1.3 Approx. 0.5	10-20 1.0-1.5	Based on the uniformity and curvature coefficients, Uni-Soil offers a favorable size distribution.
Consistency characteristics	W_L Liquid limit Wp Plastic limit Ip Plastic index	NP NP NP	NP NP NP	NP NP NP	Uni-Soil offers an NP (non-plastic) liquid limit and plastic limit. As a result, the granulations do not change into sludge again as a result of water utilization.
CBR value	Re Expansion ratio Design CBR Corrected CBR	Good roadbed: 1% or less Normal roadbed: 3% or less Upper subgrade: 10% or less Lower subgrade: 5% or less Base course: 80% or less Subbase course: 20% or less	Less than 1% 8-40%	Less than 1% 10-60% 20-70%	Uni-Soil offers superior strength properties, making it possible to apply Uni-Soil to roadbed and subbase courses. Even for base course applications, mixture with RC material ensures a CBR value of 80% or higher.
Permeability test	k Permeability coefficient	Differs according to application. Example: Smaller value applied to embankment material; larger value applied to filling material.	10^-3cm/s	10^-3-10^-5cm/s	Uni-Soil’s permeability enables formation into all sizes, from small to large, without variation in raw mud properties.

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