Sludge reduction treatment system

Abstract

According to the sludge reduction treatment process, a sedimentation tank is communicated with an adjusting tank, and the adjusting tank is communicated with an anaerobic tank, an anoxic tank and an aerobic tank and then communicated with a secondary sedimentation tank and a disinfection tank; the device is characterized in that the secondary sedimentation tank is communicated with the sludge concentration tank; one path of the sludge concentration tank is communicated with the filter-pressing dehydration device; the filter-pressing dehydration device is communicated with the regulating tank and the discharge port; supernate of the sludge thickening tank flows into the regulating tank; filtered water of the filter-pressing dehydration device flows into the adjusting tank; the sludge concentration tank is provided with a micro-nano aeration device, a microbial active enzyme MP16 is put into the sludge concentration tank, the MP16 enzyme and the efficient micro-nano aeration device are put into the sludge concentration tank to carry out biochemical reaction and accelerate the reaction rate, and 80%-90% of organic sludge can be degraded only in 4-6 hours; upper-layer treated clear water flows back into the adjusting tank to be continuously subjected to water treatment (can be used as a carbon source to be supplemented into the adjusting tank), and other inorganic sludge is conveyed to be subjected to filter pressing dehydration and then can be transported outwards for disposal.

Description

Technical Field

[0001] This invention belongs to the field of sludge treatment technology, and specifically relates to a sludge reduction treatment system. Background Technology

[0002] Traditional wastewater treatment plants separate sludge into sludge and water through processes such as filtration, sedimentation, microbial treatment, and sludge dewatering. The sludge is then transported off-site for further treatment. After microbial treatment, the sludge contains a large number of dead bacteria. When it enters the sludge thickening tank, the resulting sludge volume is large, leading to significant discharge, high costs, and environmental pollution.

[0003] The residual sludge produced by traditional processes is often used to make fertilizer for farmland, but this method is costly and inefficient, and is currently mostly disposed of as waste through landfill or incineration. Incineration incurs costs and produces large amounts of carbon dioxide, resulting in significant greenhouse gas emissions. Landfill disposal faces the problem of dwindling and non-renewable landfill space. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a sludge reduction treatment system that can rapidly destroy the microbial cell structure in sludge, release intracellular substances, and promote the biodegradation of sludge by using a combination of micro-nano aeration devices and enzymes.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A sludge reduction treatment process includes a sedimentation tank connected to an equalization tank, which in turn connects to an anaerobic tank, an anoxic tank, and an aerobic tank, and is further connected to a secondary sedimentation tank and a disinfection tank. The secondary sedimentation tank is connected to a sludge thickening tank; one path of the sludge thickening tank is connected to a filter press dewatering device, and another path is connected to the equalization tank; the filter press dewatering device is connected to the equalization tank and its discharge outlet; the supernatant from the sludge thickening tank flows into the equalization tank; and the filtered water from the filter press dewatering device flows into the equalization tank.

[0006] The sludge thickening tank is equipped with a micro-nano aeration device.

[0007] The aforementioned micro-nano aeration device is a micro-nano aeration device with patent number ZL201721484798.7.

[0008] The sludge thickening tank contains the microbial active enzyme MP16.

[0009] The addition of the microbial active enzyme MP16 can be set to be automated.

[0010] The microbial active enzyme MP16 is a complex enzyme activity aid obtained from natural fruits and vegetables through a compound fermentation process of more than 3 months, followed by maturation for more than 3 years. It is composed of specific trace elements, organic elements, electrolytes, amino acids, vitamin-like amino acid derivatives, enzymes, and minerals, and can strongly activate enzymes. Analysis has confirmed the presence of the following amino acids and enzymes: cysteine, carnitine, phosphoserine, tryptophan, urease, protease, lipase, amylase, lysozyme, and catalase. In addition to the aforementioned beneficial amino acids and enzymes, it also contains vitamins, minerals, trace amounts of facultative anaerobic microorganisms, photosynthetic bacteria and their metabolites, and the production of humic substances and humic acid during the production process has also been confirmed.

[0011] The beneficial effects of this invention are: The system uses microbial metabolites instead of traditional activated sludge bacteria, employing a pure microbial decomposition system that uses enzymes to break down BOD and SS components; and utilizes a high-efficiency aeration device to increase dissolved oxygen levels and rapidly eliminate organic components from the sludge.

[0012] It does not use any artificial synthetic chemical agents, does not require flocculants, and is entirely biodegradable, making it natural and environmentally friendly.

[0013] By utilizing the special properties of the microbial enzyme MP16, odor generation in wastewater treatment can be significantly reduced.

[0014] By maximizing the use of existing processing equipment and reducing equipment investment, significant results can be achieved simply by modifying the existing pipelines and adding MP16 enzyme. After the initial setup, during the operation of the process, only a small amount (about 5%-10% of the initial amount) of special fermentation material needs to be added each year to maintain the system operation.

[0015] The patented aeration equipment can efficiently increase dissolved oxygen levels, so only intermittent aeration (about a few minutes per hour) is needed to maintain the system, greatly reducing energy costs.

[0016] Compared to the original incineration process, the greenhouse gas emissions are significantly reduced during the treatment.

[0017] The process system suppresses the generation of hydrogen sulfide gas and ammonia gas, etc., to prevent metal corrosion (extend equipment service life).

[0018] As organic sludge is degraded during treatment, the number of sludge removals and the amount of sludge transported are significantly reduced, thus lowering subsequent treatment costs.

[0019] An automated bio-enzyme dispensing mechanism can be set up, enabling fully intelligent system applications and reducing labor costs. Attached Figure Description

[0020] Figure 1 This is a system schematic diagram of the present invention.

[0021] Figure 2 The figure shows the result of an embodiment of the present invention. Detailed Implementation

[0022] The invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, a sludge reduction treatment process includes a sedimentation tank connected to an equalization tank, which in turn is connected to an anaerobic tank, an anoxic tank, and an aerobic tank, and further connected to a secondary sedimentation tank and a disinfection tank. The secondary sedimentation tank is connected to a sludge thickening tank; one path of the sludge thickening tank is connected to a filter press dewatering device, and another path is connected to the equalization tank; the filter press dewatering device is connected to the equalization tank and its outlet; the supernatant from the sludge thickening tank flows into the equalization tank; and the filtered water from the filter press dewatering device flows into the equalization tank.

[0024] The sludge thickening tank is equipped with a micro-nano aeration device.

[0025] The aforementioned micro-nano aeration device is a micro-nano aeration device with patent number ZL201721484798.7. This device can generate micro-nano bubbles of 300 nanometers to 50 micrometers, which can efficiently and rapidly increase the dissolved oxygen in the water being treated, and the residence time in the water is much longer than that of ordinary aeration; at the same time, the bubbles smaller than 50 micrometers carry a positive charge and can adsorb negative ions (mainly OH- free radicals) in the water, thereby significantly improving the water purification capacity; The high-efficiency micro-nano aeration device is a water pollution treatment and water environment remediation device developed according to water purification requirements. Micro-nano aeration generates micro-nano bubbles ranging from 500 nanometers to 50 micrometers, which can significantly increase the specific surface area, improving oxygen dissolution efficiency by tens of times and greatly increasing the residence time of oxygen in water. Simultaneously, the micro-nano bubbles smaller than 50 micrometers are charged and can adsorb a large number of free radicals (hydroxyl ions, strong oxidants) in the water. As the micro-nano bubbles move in the water, they can achieve rapid and efficient treatment of pollutants. It is energy-saving and provides an air flotation effect.

[0026] The sludge thickening tank contains the microbial active enzyme MP16.

[0027] The addition of the microbial active enzyme MP16 can be set to be automated.

[0028] The microbial active enzyme MP16 is a complex enzyme activity aid obtained from natural fruits and vegetables through a compound fermentation process of more than 3 months, followed by maturation for more than 3 years. It is composed of specific trace elements, organic elements, electrolytes, amino acids, vitamin-like amino acid derivatives, enzymes, and minerals, and can strongly activate enzymes. Analysis has confirmed the presence of the following amino acids and enzymes: cysteine, carnitine, phosphoserine, tryptophan, urease, protease, lipase, amylase, lysozyme, and catalase. In addition to the aforementioned beneficial amino acids and enzymes, it also contains vitamins, minerals, trace amounts of facultative anaerobic microorganisms, photosynthetic bacteria and their metabolites, and the production of humic substances and humic acid during the production process has also been confirmed.

[0029] In the sludge thickening tank, a specially formulated microbial active enzyme, MP16, is added to dissolve the cell walls of dead bacteria. After the cell walls rupture, the cytoplasmic contents (BOD components) escape and are digested, thus dissolving the bacteria and decomposing the organic matter in the sludge. Simultaneously, a micro-nano aeration device generates positively charged microbubbles in the water, adsorbing a large number of free radicals, which also efficiently treats the dead bacteria. The treated sludge water has a sludge volume reduced by more than 50% (organic sludge is almost entirely degraded). On this basis, the dewatering efficiency will also be improved, resulting in a significant reduction in the amount of sludge filtered out and a lower moisture content.

[0030] This process uses MP16 enzyme and a high-efficiency micro-nano aeration device to carry out biochemical reactions and accelerate the reaction rate. It can degrade 80%-90% of organic sludge in just 4-6 hours. The supernatant treated water is returned to the equalization tank for further water treatment (it can be used as a carbon source to supplement the equalization tank). The remaining inorganic sludge is transported to the filter press for dewatering and then transported for disposal.

[0031] After the organic sludge is degraded, the filter press dewatering unit no longer needs to use any flocculants. Example

[0032] like Figure 2 As shown, in the wastewater treatment plant of Chayuan in Nan'an District, Chongqing, the existing sludge thickening tank was modified using this process principle. MP16 enzyme and micro-nano aeration equipment were added. High-concentration sludge mixture (i.e., excess sludge) from the CASS biological treatment tank of the wastewater treatment plant was collected in a plastic container, aerated for 1.0 hour, and then the biological enzyme preparation was added, with continuous aeration. Sludge concentration was sampled periodically to determine the reduction effect.

[0033] Residual sludge mixed liquor volume: approximately 1.6 m³ 3 : Bio-enzyme preparation dosage: 700ml;

[0034] On the 15th, PAM (coagulant) was added to the settled sludge after the experiment, and then dewatered using a belt filter press. The sludge properties were good, with a moisture content of 76%. After adding biological enzyme preparations and continuously aerating for 12 hours, the reduction of organic sludge was basically completed, with a reduction of about 50%.

Claims

1. A sludge reduction treatment process comprising a sedimentation tank connected to a conditioning tank, the conditioning tank connected to an anaerobic tank, an anoxic tank and an aerobic tank, in turn connected to a secondary sedimentation tank and a disinfection tank; characterized in that, Secondary sedimentation tank is connected with sludge concentration tank; sludge concentration tank is connected with filter-press dewatering device and adjusting tank; filter-press dewatering device is connected with adjusting tank and discharge outlet; supernatant of sludge concentration tank flows into adjusting tank; filtered water of filter-press dewatering device flows into adjusting tank; sludge concentration tank is provided with micro-nano aeration device and microorganism active enzyme MP16 is put into.

2. A sludge reduction process according to claim 1, characterized in that, The micro-nano aeration device is a micro-nano aeration device with a patent number ZL201721484798.

7.

3. A sludge reduction process according to claim 1, characterized in that, The microorganism active enzyme MP16 can be automatically put into.

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