Top 4 most effective sludge treatment solutions
Date public: 04-05-2024||View: 1753
Sludge is the final residue left after the wastewater treatment process. Sludge treatment is a key factor in limiting negative impacts on the environment and human health. Therefore, to better understand effective sludge treatment methods, Đại Nam Environment will provide basic information below.
1. Current situation of sludge from wastewater treatment systems
Wastewater has gradually become a hot issue as its rate increases due to human daily activities and the growing economy. The need for sludge treatment will reduce pollution and effectively protect the environment and human health. However, not all types of sludge are treated effectively and in compliance with the technical standards set by the country. This poses a significant risk to both health and the environment.
In reality, the budget for sludge treatment is also a concern. Many businesses, livestock households, and farms often look for minimal processing methods to reduce costs. One common method is dumping sludge in abandoned lands or sparsely populated areas. By installing wastewater treatment systems in these areas, the impact on human activities is minimized.
Cost-saving sludge treatment methods from wastewater treatment systems
2. Harmful components of sludge
One of the main reasons sludge from wastewater treatment systems causes environmental pollution is the presence of harmful materials, including:
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Domestic and livestock wastewater: Contains many residues that produce unpleasant odors.
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Mechanical, metal, textile, chemical, tanning, electroplating, pharmaceutical, cosmetic, paint, ink industries, etc.
All these wastes present in sludge, if not collected and properly treated, will lead to the leakage of toxic substances into the environment. As a result, it can cause various diseases in humans, such as lung cancer, dermatitis, etc.
3. Sludge treatment solutions from the wastewater treatment process
3.1 Sludge treatment using sludge thickening tanks
The purpose of the sludge thickening method is to increase the concentration of solid substances and minimize the moisture content of the sludge. Using sludge thickening tanks is a preliminary treatment solution before proceeding to subsequent processes like sludge drying beds or filter press machines.
The objective of sludge thickening is to increase the concentration of solid substances and reduce the moisture content of the sludge to a minimum. Using sludge thickening tanks is a preliminary solution before moving to further treatment processes.
3.2 Sludge treatment using sludge drying beds
Applying sludge drying beds is one of the manual solutions that has been used for a long time. To ensure the quick drying process of the sludge, the drying bed is often divided into different compartments. The structure of the sludge drying bed includes the following parts:
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A rectangular tank with a height of 0.6 - 1 meter, including several parallel compartments.
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A drainage system to collect water – designed to prevent the filtering material from allowing sludge water to enter the pipes.
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A gravel and sand filtration system – consists of two layers: a gravel supporting layer 20 cm thick and a quartz sand layer 20 cm thick.
Using sludge drying beds to increase sludge removal efficiency
3.3 Sludge treatment using aerobic and anaerobic decomposition methods
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Anaerobic sludge decomposition tank: Utilizing suspended microorganisms in the tank, the sludge will gradually decompose and reduce in volume. The water generated after decomposition is recirculated back to the equalization tank.
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Aerobic sludge decomposition tank: Equipped with an aeration system similar to the Aerobic biological tank. The volume of sludge generated can be reduced through intracellular decomposition due to nutrient deficiency, with the microorganisms using the dead microorganisms as a substrate.
3.4 Sludge treatment using filter press machines
The sludge generated from the wastewater treatment system is pumped through the suction membrane and pushed into the filter plates of the press machine. The size of the filter mesh is smaller than the size of the sludge particles, so the sludge is retained between the filter cloth layers, while the water passes through and exits the system. The choice of a filter press machine depends on the production industry and the specific wastewater flow that needs to be treated.
The above-mentioned sludge treatment solutions from wastewater treatment systems all meet the required technical standards. Depending on the scale and the amount of wastewater that needs to be treated, you can consider choosing the appropriate solution for your business or facility.
With over 10 years of operation, Đại Nam Environment is confident in being a leading company specializing in the design, consultation, and construction of wastewater treatment and purified water systems; environmental document consultation; supply of microorganisms and biological carriers for wastewater treatment; and manufacturing composite modular wastewater treatment equipment. Refer to our latest article on the website or contact the hotline directly for consultation: 0909 378 796.
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