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Sludge phase-splitting slaking method of water treatment plant

A sewage treatment plant and sludge technology, which is applied in the field of sludge waste pollution control in sewage plants, can solve problems such as poor economy, unfavorable sludge reduction, and reduced sludge dewatering effect, and achieve the effect of reducing the impact.

Active Publication Date: 2009-08-05
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, within the framework of sludge anaerobic digestion, there is still a lack of solutions. In order to avoid the problem of phosphorus release in sludge digestion, only aerobic digestion or no digestion technology can be used, but sludge aerobic digestion is very important for treatment Capacity greater than 50,000 m 3 / d sewage plant, its economy is obviously inferior to that of anaerobic digestion
Instead of using digestion technology, under the same dehydration technology conditions, the dehydration effect of sludge is significantly reduced, which is not conducive to the reduction of sludge
In summary, there is currently no solution to these technical problems prevalent in anaerobic digestion of sludge

Method used

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  • Sludge phase-splitting slaking method of water treatment plant
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  • Sludge phase-splitting slaking method of water treatment plant

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Embodiment Construction

[0027] The following is a sewage treatment plant with a sludge dry solid production of 20t / d (equivalent to a daily sewage treatment of 100,000 m 3 sewage treatment capacity) as an example, the specific implementation of the present invention is introduced in conjunction with the accompanying drawings.

[0028] see figure 1 , 2 and 3.

[0029] The amount of concentrated sludge in a sewage treatment plant with a sludge dry solid production of 20t / d is about 400m 3 / d (moisture content 95%), the concentrated sludge first performs partition heat exchange in heat exchanger A with the secondary steam from the hollow paddle dryer passing through heat exchanger B, and the temperature is raised to 35 ° C ~ 40 ° C, Then enter the aeration hydrolysis digestion reactor to carry out hydrolysis digestion; the main body of the aeration hydrolysis digestion reactor is two concentric cylinders with different diameters, the outer cylinder 3 is a closed structure, the upper side is provided ...

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Abstract

The invention disclose a sludge phase-splitting slaking method of waste water disposing plant involving to a sludge disposing and resource utilization technology, which comprises the following steps: proceeding aerate hydrolytic slaking reaction 6d with dissolved oxygen at 1.5-2 mg / L, pH value at 5.5-6.0 and temperature at 30-35 deg.c; getting hydrolytic slaking product; entering into centrifugal machine; proceeding solid-liquid separation; getting hydrolysate and mud cake; entering hydrolysate into filling-type methanation reacting bed with temperature at 32-38 deg.c and cycling speed at 0.005-0.02m / s; proceeding methanation slaking with waterpower residence time at 3d; getting marsh gas and slaking yielding water; leading marsh gas to gas-fired boiler; producing vapor; refluxing slaking yielding water to distribution well of sewage disposal plant; mixing mud cake with dry sludge till moisture percentage at 50-60%; heating and drying with vapor producing by boiler in dehumidifier; getting dry sludge with moisture percentage at 32-38%; using to land.

Description

technical field [0001] The invention discloses a phase-separation digestion method for sewage treatment plant sludge, relates to a sewage treatment plant sludge treatment and resource utilization technology, and belongs to the technical field of sewage treatment plant sludge waste pollution control. Background technique [0002] Sludge is an inevitable secondary pollutant in sewage treatment plants using aerobic biological treatment processes. The results of the material balance test of urban sewage treatment plants show that more than 70% of the organic matter removed in the water treatment process of sewage plants is enriched in sludge. Therefore, "reduction, harmlessness, and recycling" are the principles of sludge management in sewage treatment plants, and also the basic guidelines for the development and selection of treatment technologies. At present, the sludge anaerobic digestion technology that conforms to the sludge management principles of sewage treatment plants...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/02C02F11/04C02F11/12C05F7/00
CPCY02E50/343Y02A40/20Y02E50/30Y02W10/20Y02W30/40
Inventor 何品晶邵立明吕凡章骅
Owner TONGJI UNIV
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