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Domestic sludge aerobic composting method and system thereof

A technology of aerobic composting and domestic sludge, which is applied in the field of aerobic composting of domestic sludge and its system, can solve the problems of long decomposing period and poor sludge reduction effect, so as to reduce labor demand and reduce Labor intensity, the effect of ensuring the continuity of production

Pending Publication Date: 2017-08-25
WUXI GUOLIAN ENVIRONMENTAL SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above problems, the present invention provides an aerobic composting method of domestic sludge, which can solve the technical problems of the existing aerobic composting method, such as long one-time decomposition cycle and poor sludge reduction effect

Method used

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  • Domestic sludge aerobic composting method and system thereof

Examples

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Embodiment 1

[0029] A kind of aerobic composting method of domestic sludge, it may further comprise the steps:

[0030] step one,

[0031] First, adjust the solid content of the sludge to form an initial slurry. The solid content of the initial slurry is 3%-10%. The primary dewatered sludge with a moisture content of 80%-85% is mixed;

[0032] Secondly, add filter aid and curing agent to the initial mud in turn for conditioning, and stir and mix separately. The rotation speed of stirring and mixing is 100r / min, and the time is 15min. It is 10%~30% of the solid content of the sludge. The solidifying agent includes 5%-15% incinerator slag, 50%-70% carbide slag and 20%-35% desulfurization gypsum in terms of mass fraction. The filter aid is porous biomass Materials; porous biomass materials used as filter aids include any one or more of the following materials: sawdust, bamboo powder, mushroom residue, activated carbon, plant ash, plant seeds or fruit core shells; porous biomass materials ar...

Embodiment 2

[0047] The only difference between the aerobic composting method of Example 2 and the method of Example 1 is that step 1 uses the primary dewatered sludge alone or uses the concentrated sludge alone for deep dehydration; wherein, the primary dewatered sludge needs to be diluted with water, and the concentrated sludge It needs to stand still to remove the supernatant, so that the solid content of the initial mud is 3%-10%.

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Abstract

The invention provides a domestic sludge aerobic composting method, which can solve the technical problems that the existing aerobic composting method is long in one-time composting period, and poor in sludge reduction effect. The method comprises the following steps: I. adding a conditioning agent for hardening and tempering, and then performing deep dehydration treatment to obtain a mud cake; II. crashing the mud cake to obtain mud cake particles; and III. composting and fermenting the mud cake particles. The composting method is characterized in that the conditioning agent contains a curing agent and a filtering aid, the addition quantity of each of the curing agent and the filtering aid is 10%-30% of solid content of sludge; the curing agent contains the following raw materials in percentage by mass: 5% -15% of incineration furnace slag, 50%-70% of carbide slag, and 20% -35% of desulfurization plaster, and the filtering aid is a porous biomass material. In addition, the invention further provides a domestic sludge aerobic composting system for realizing the method.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to the technical field of sludge resource utilization, in particular to an aerobic composting method and system for domestic sludge. Background technique [0002] With the acceleration of urbanization and the concentration of population, the production of urban domestic sewage has increased year by year, and the production of sludge, a by-product of sewage treatment, has also formed an incremental growth. In the face of increasingly severe environmental pressure and the energy shortage brought about by the rapid development of industrialization, resource utilization—that is, while reducing and stabilizing sludge, as much as possible the useful components—mainly carbon The rational use of nitrogen and nitrogen sources has become a research hotspot in current sludge disposal methods. [0003] Aerobic composting is a commonly used technical method in the utilization of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/02C05F7/00C05F17/00C02F11/02
CPCC02F11/02C05F7/00C05F17/90C05F17/50Y02A40/20Y02W10/20Y02W30/40
Inventor 宋联朱葛何艳华王瑞章旭
Owner WUXI GUOLIAN ENVIRONMENTAL SCI & TECH
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