Sludge anaerobic treatment system and method

Abstract

The invention provides a sludge anaerobic treatment system and method, and relates to the field of sludge treatment.The sludge anaerobic treatment system comprises a hardening and tempering tank, a sterilization tank, an alkali washing tank, a neutralizing tank and an anaerobic fermentation tank, sludge enters the hardening and tempering tank, and the hardening and tempering tank adjusts the water content of the sludge; inlets of the sterilization tank and the alkali washing pool are connected in parallel to an outlet of the conditioning pool, and outlets of the sterilization tank and the alkali washing pool are connected in parallel to an inlet of the neutralization pool; the inlet of the anaerobic fermentation tank is connected with the outlet of the neutralization tank, the system can improve the sterilization rate of sludge to 90-100% through flow design, the biogas residue after anaerobic treatment is high in stabilization degree, good in dehydration effect and high in subsequent resource utilization rate; the COD content of the treated sludge solution is increased, the anaerobic digestion and decomposition rate is high, and the organic matter degradability is high.

Description

technical field

[0001] The invention relates to the field of sludge treatment, in particular to a sludge anaerobic treatment system and method. Background technique

[0002] As a by-product of sewage treatment, sludge is enriched with rich pollutants, including heavy metals, refractory organic matter, parasite eggs and virus microorganisms. The national "Water Ten Measures" clearly stipulates that sludge should be treated and disposed of in a stabilized, harmless and resourceful manner, so as not to cause secondary pollution to the environment.

[0003] At present, my country's main sludge stabilization treatment includes sludge drying and incineration, high-temperature aerobic fermentation technology and anaerobic digestion technology. Anaerobic digestion of sludge includes high-temperature anaerobic digestion process and medium-temperature anaerobic digestion process. Considering energy consumption and other issues, medium-temperature anaerobic digestion technology is wid...

Examples

Embodiment Construction

[0031] The technical solutions of the invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the invention, not all of them. Based on the embodiments of the invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the invention.

[0032] As shown in the figure, the present invention provides a sludge anaerobic treatment system, including a conditioning tank 1, a sterilization tank 2, an alkali washing tank 3, a neutralization tank 4 and an anaerobic fermentation tank 5, wherein,

[0033] The sludge enters the conditioning pool 1 through the inlet of the conditioning pool 1, and the conditioning pool 1 is connected to tap water, and the conditioning pool 1 adjusts the moisture content of the sludge;

[0034] The inlet of the sterilization tank 2 and the alkali washing tank...

technical field

[0001] The invention relates to the field of sludge treatment, in particular to a sludge anaerobic treatment system and method. Background technique

[0002] As a by-product of sewage treatment, sludge is enriched with rich pollutants, including heavy metals, refractory organic matter, parasite eggs and virus microorganisms. The national "Water Ten Measures" clearly stipulates that sludge should be treated and disposed of in a stabilized, harmless and resourceful manner, so as not to cause secondary pollution to the environment.

[0003] At present, my country's main sludge stabilization treatment includes sludge drying and incineration, high-temperature aerobic fermentation technology and anaerobic digestion technology. Anaerobic digestion of sludge includes high-temperature anaerobic digestion process and medium-temperature anaerobic digestion process. Considering energy consumption and other issues, medium-temperature anaerobic digestion technology is wid...

Examples

Embodiment Construction

[0031] The technical solutions of the invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the invention, not all of them. Based on the embodiments of the invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the invention.

[0032] As shown in the figure, the present invention provides a sludge anaerobic treatment system, including a conditioning tank 1, a sterilization tank 2, an alkali washing tank 3, a neutralization tank 4 and an anaerobic fermentation tank 5, wherein,

[0033] The sludge enters the conditioning pool 1 through the inlet of the conditioning pool 1, and the conditioning pool 1 is connected to tap water, and the conditioning pool 1 adjusts the moisture content of the sludge;

[0034] The inlet of the sterilization tank 2 and the alkali washing tank...

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