Sludge Waste Disposal Services

Sludge Waste Disposal Services?

Definition of Sludge

According to the Ministerial Regulation on Sanitary Management of Waste, B.E. 2561 (2018), sludge refers to the solid residue left after the treatment of waste.

In the Thai Science and Technology Dictionary (NSTDA), sludge is defined as a solid substance separated from water or wastewater, which settles at the bottom.

Additionally, the Royal Institute Dictionary, B.E. 2554 (2011) describes sludge as a substance dissolved in water or other liquids that aggregates and sinks to the bottom of a container.

Types of Sludge

Sludge can be classified into three main types as follows:

Solid Sludge
- This type includes paint dust, polishing powder, and sludge from various treatment systems.
- It has a dry texture and can be crumbled by hand.
- Sources:
  - Paint dust and polishing powder mostly come from paint manufacturing factories.
  - Sludge from treatment systems is commonly found in factories with wastewater treatment systems.
Semi-Solid Sludge
- This type consists of paint sludge from water curtain systems, commonly found in paint production plants.
- Food and beverage production factories also generate this type of sludge.
Liquid Sludge
- This is a highly fluid sludge that can be extracted using a vacuum truck.
- It closely resembles water in consistency.
- Major source: Various wastewater treatment systems.

Sludge Disposal Methods

Landfilling
- Sludge is analyzed to determine whether it is hazardous or non-hazardous.
- Different landfill sites are designated for different types of sludge.
- Hazardous sludge must undergo neutralization treatment before disposal.
Blending for Alternative Fuel
- Dust or sand from polishing processes is mixed with cement to produce interlocking bricks or lightweight bricks.
- If the sludge meets the required specifications, it can be repurposed for lightweight brick production.
Incineration
- Sludge incineration facilities or industrial waste incinerators must be certified by the Department of Industrial Works.
- Sludge samples are analyzed before disposal.
- Incineration occurs at 1,450°C, effectively eliminating hazardous substances.
- Emissions from the process are captured and treated before being released into the environment.

Sludge Disposal Services by One More Link

At One More Link, we have an experienced team specializing in industrial sludge disposal following proper and legal procedures. We ensure the entire process, from sludge removal at the factory to final disposal, is conducted efficiently and in compliance with regulations.

Our sludge disposal methods follow the waste management code as outlined below:

041 – Fuel Substitution:
- Direct incineration in an industrial incinerator or cement kiln for energy recovery.
042 – Fuel Blending:
- Sludge is blended to create alternative fuel used in incinerators, cement kilns, boilers, and industrial furnaces. The final destination is specified to ensure compliance.
043 – Energy Recovery Incineration:
- Incineration of non-hazardous waste materials in stoves, boilers, and industrial furnaces to generate energy.

With our expertise and ISO 9001 & 14001 certification, we guarantee safe, legal, and verifiable sludge disposal services.

Sludge Disposal Methods by One More Link

At One More Link, we provide safe and legal sludge disposal services, ensuring compliance with environmental regulations. Our sludge disposal methods align with waste management codes, including:

041 – Fuel Substitution: Direct incineration in industrial incinerators or cement kilns for energy recovery.

042 – Fuel Blending: Converting sludge into alternative fuel for use in incinerators, cement kilns, boilers, and industrial furnaces.
043 – Energy Recovery Incineration: Incineration of non-hazardous waste materials in stoves, boilers, and industrial furnaces.
044 – Raw Material Substitution: Using sludge as alternative raw material in cement kilns.
049 – Other Recycling Methods: Repurposing sludge through various recycling techniques.
075 – Hazardous Waste Incineration: Disposal via specialized hazardous waste incinerators.
076 – Co-Incineration in Cement Kilns: Safe destruction of sludge alongside other materials in cement kilns.
083 – Composting or Soil Conditioning: Transforming non-hazardous sludge into compost or soil conditioner.

Steps to Convert Sludge into Fertilizer or Soil Conditioner

Sludge can be processed into fertilizer or soil conditioner through the following steps:

Sample Collection & Analysis – Conduct laboratory tests to determine the sludge’s composition and suitability for fertilizer production.
Weighing & Classification – Transport sludge to an industrial waste facility for classification and weighing.
Moisture Reduction & Odor Treatment – Dry the sludge to reduce moisture content and eliminate odors.
Shredding & Mixing – Break down and process the sludge for better consistency.
Blending with Fertilizer Ingredients – Mix sludge with organic and mineral components to enhance its nutrient value.

6.Granulation & Pellet Formation – Shape the sludge mixture into fertilizer pellets for easier application.

7.Quality Inspection – Conduct quality control tests to ensure the fertilizer meets regulatory standards.

8.Transportation to Farmers – Distribute the final fertilizer product to agricultural users.

With our ISO-certified processes, One More Link ensures that sludge-to-fertilizer conversion is safe, effective, and environmentally friendly. Contact us for sustainable waste management solutions!

Aluminium Dross

Aluminium Dross Powder Disposal

(Aluminium Dross)

Aluminium Dross: Definition & Disposal Methods

Aluminium Dross is a byproduct of the aluminium smelting process, consisting of:
✔ Recoverable aluminium
✔ Aluminium oxides
✔ Impurities and other residues

Since aluminium dross still contains usable aluminium, proper disposal and recovery methods can help reduce waste and maximize resource efficiency.

1. Recycling & Recovery of Aluminium Dross

Separation of Aluminium from Dross

Hot Dross Processing or Cool Dross Processing methods are used to extract residual aluminium efficiently.
Special furnaces such as Rotary Furnaces or Salt Slag Furnaces help recover more aluminium content from the dross.

Utilization of Aluminium Oxide

The remaining aluminium oxide can be repurposed as a raw material in industries such as:
✔ Ceramics
✔ Cement manufacturing
✔ Abrasive products

♻ By implementing effective recycling and recovery techniques, aluminium dross can be transformed into valuable materials, reducing waste and environmental impact.

2. Safe Disposal of Aluminium Dross

Landfilling (Last Resort)

Used only when recycling is not possible.
Must be disposed of in licensed and controlled landfills to prevent heavy metal contamination.

Chemical Treatment

Chemical stabilization helps make the dross less reactive, reducing the release of toxic gases and contaminants.

3. Utilization in Other Industries

Construction Industry

Used as a raw material for refractory bricks, concrete, and thermal insulation.

Cement Industry

Acts as an additive in cement production to enhance strength and durability.

Proper aluminium dross management reduces waste, minimizes environmental impact, and enhances the value of recycled materials in various industries. ♻

Services of One More Link

Additionally, we have been certified under ISO 9001 and ISO 14001, reaffirming our commitment to international standards, legal compliance, and full transparency in all processes.

Before sludge disposal, it must undergo analysis to determine whether it is classified as hazardous or non-hazardous. The disposal of sludge and industrial waste must comply with the Ministry of Industry’s Waste Management Regulations of 2023.