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Anaerobic processing method and device

A treatment method and technology of treatment device, which are applied in the fields of sludge treatment, biological sludge treatment, chemical instruments and methods, etc., can solve the problem that the moisture content of dewatered sludge is not easily reduced, the cost of chemicals is high, and the sludge is difficult to dewater, etc. problem, to achieve the effect of reducing anaerobic digestion capacity, effective recovery, and low-cost dehydration treatment

Active Publication Date: 2013-10-09
水翼株式会社
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, the anaerobic digester equipment must have a large capacity, the cost of chemicals in the treatment of digested sludge is high, and sludge is difficult to dehydrate, and the moisture content of dewatered sludge is not easy to decrease, so there are many problems. Technology

Method used

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  • Anaerobic processing method and device
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  • Anaerobic processing method and device

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Experimental program
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Embodiment 1

[0090] according to figure 1 Implementation of the process.

Embodiment 2

[0092] according to figure 2 Implementation of the process. Among them, regarding the dehydration treatment of anaerobic digested sludge, the image 3 with Figure 4 The treatment methods shown are combined.

Embodiment 3

[0140] Then, according to Figure 5 , Describes an example of anaerobic treatment of sewage sludge and food manufacturing waste (waste sugar liquid and dessert-based waste products) and river mowing.

[0141]

[0142] ·Sewage sludge volume (mixed sludge of primary sludge and excess sludge) 30m 3 / Day (TS concentration 3.1%)

[0143] ·Incoming volume of food manufacturing waste is 1.35t / day (TS concentration 9.9%)

[0144] ·The river occupies an area of ​​0.15t / day of mowing and transport (water content 70.0%)

[0145] ·Biogas storage tank 3m 2 ×2 slots

[0146]

[0147] ·Gap type thickener (screen gap width 1.0mm, with back pressure plate)

[0148] ·Cation polymer flocculant (average molecular weight 3 million) injection rate 0.4% (ratio to SS)

[0149] ·Amount of sludge concentrate 12t / day (TS concentration 7.9%)

[0150] ·Separated liquid volume 19.5m 3 / Day (SS concentration 395mg / L)

[0151] ·SS recovery rate 97%

[0152] ·Crushing device for mowing

[0153]

[0154] ·The input amount of ...

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Abstract

The purpose of the present invention is to provide an anaerobic processing method and a device, whereby: an anaerobic digestion device can be made more compact; the generation of phosphorous, siloxane, and other precipitates is reduced; sludge generated at wastewater processing facilities, etc., is stably and efficiently anaerobically digested; biogas (especially methane gas) can be efficiently recovered; digested sludge can be efficiently dewatered; and cost is reduced. Provided is an anaerobic processing method that includes: a preprocessing step that solid / liquid separates a coagulated sludge, which is prepared by adding a coagulant to sludge, into a sludge concentrate with a sludge concentration of 4-12% and a separated liquid; an anaerobic digestion step that anaerobically digests the sludge concentrate and also recovers biogas; a step for preparing a digested sludge coagulant by mixing a coagulant and at least one of either the separated liquid and water, with the anaerobically digested sludge prepared in the anaerobic digestion step; and a step for dewatering a digested sludge concentrate obtained by solid / liquid separating the digested sludge coagulant. Also provided is a device for implementing said processing method.

Description

Technical field [0001] The invention relates to an anaerobic treatment method and device for sludge. Background technique [0002] Compared with aerobic treatment, anaerobic digestion of sludge produces less sludge, pathogenic microorganisms and parasite eggs can be quickly killed and stabilized, no oxygen supply is needed, and power consumption is low, which can be Obtaining biogas with methane gas as the main component is a technology that has been applied as an energy-saving treatment method since ancient times. On the other hand, anaerobic digestion tank equipment must be large-capacity, the chemical cost is high in the treatment of digested sludge, and the sludge is difficult to dewater, and the moisture content of dewatered sludge is not easy to decrease, so it is also a problem. Technology. [0003] Therefore, as an existing sludge treatment method, instead of anaerobic digestion of sludge, there are many cases where the sludge is either dewatered and then landfilled or de...

Claims

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Application Information

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IPC IPC(8): C02F11/04B09B3/00C02F11/14C02F11/147
CPCY02E50/343C02F11/04C02F11/14Y02E50/30C02F11/147
Inventor 片冈直明萩野隆生西胁正人
Owner 水翼株式会社