Method for processing sludge and preparing bio organic fertilizer and special leaven thereof

Abstract

The invention discloses a method for processing sludge to prepare biological organic fertilizer and a special starter thereof. The active components of the sludge starter are composed of bacillus subtilis, bacillus stearothermophilus, aspergillus niger, thermophilic sporotrichum and saccharomyces cerevisiae. The provided method for processing sludge to prepare biological organic fertilizer is as follows: the sludge and excipient are mixed; then the provided sludge starter is inoculated into the mixture of the sludge and the excipient to ferment the mixture of the sludge and the excipient, and thus matured sludge is obtained; finally, streptomyces microflavus is inoculated into the matured sludge to cultivate the matured sludge continuously until the biological organic fertilizer is obtained. The method for processing sludge to prepare biological organic fertilizer has the advantages of simple technical procedures, less investment on the equipment, and good fermentation, dehydration, deodorization and maturity effects. Thus, the method for processing sludge to prepare biological organic fertilizer is a practical technique that makes the sludge harmless, makes the sludge become resource and recycles the sludge.

Description

technical field [0001] The invention belongs to the field of harmless treatment and recycling of urban sludge, and in particular relates to a method for treating sludge to prepare bio-organic fertilizer and a special fermentation agent thereof. Background technique [0002] With the acceleration of my country's urbanization process and the increase of urban sewage treatment rate year by year, the output of dewatered sludge in urban sewage treatment plants has also increased sharply. How to effectively treat and dispose of these sludges has become an urgent problem for environmental protection in my country. Commonly used sludge treatment and disposal methods include landfill, incineration, thermal drying, throwing into the sea and composting. These treatment and disposal measures have some shortcomings, for example: sludge landfill not only takes up a lot of land, but also pollutes the surrounding environment and Underground water bodies; although sludge incineration occupie...

AI Technical Summary

Problems solved by technology

[0004] 1. The traditional composting method treats sludge. Because no sludge starter is added, urban sludge cannot quickly reach high-temperature fermentation. The sludge fermentation time is long, the degree of harmlessness is low, and the decomposing and deodorizing effects are not good. It is only suitable for Farmers produce for their own use, and cannot realize the harmless, resourceful and commercial treatment of a large amount of sludge

[0005] 2. Using "expanding bacteria" to ferment sludge, adding a large amount of brown sugar to the sludge, resulting in waste of resources and increased production costs; at the same time, "expanding bacteria" are further expanded and cultivated by enzyme bacteria, and the composition is complex, variable and difficult Testing, there is no unified quality standard in China, and the stability of sludge fermentation effect cannot be guaranteed

[0006] 3. The currently used sludge starter is mainly composed of aerobic bacteria, and there is a lack of sludge starter consisting of aerobic bacteria and facultative aerobic bacteria

When the ventilation process fails to meet the requirements of aerobic fermentation, the problems of sludge dehydration and deodorization are often not good; when the ventilation is excessive, it is difficult for compost to maintain high temperature, the degree of harmlessness is low, and it is difficult to meet agricultural standards

[0007] 4. The composting process of tower-type aerobic fermentation or tank-type aerobic fermentation requires external forced ventilation, which requires a large investment in equipment and consumes a lot of resources, which greatly increases the cost of sludge composting

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