Microbial organic fertilizer by using papermaking sludge as raw material and preparation method thereof

Abstract

The invention provides microbial organic fertilizer by using papermaking sludge as raw material and a preparation method thereof; the microbial organic fertilizer comprises strains, absorption carrier and fermenting carrier, wherein the strain is mixed composite microbial agent prpared by mixingequal weight ratio of thermophilic fat bacillus licheniformis, trichoderma harzianum, lactobacillus planetarium and saccharomyces cerevisiae; the mixed composite microbial agent is inoculated on the fermenting carrier; the composite microbial agent is formed after the absorption carrier absorbs strain mixed liquid; the absorption carrier is crop straw; the fermenting carrier is the paper mill sludge or a mixture of the paper mill sludge and the crop straw; the strain mixed liquid is the mixture of thermophilic fat bacillus licheniformis, trichoderma harzianum, lactobacillus planetarium and saccharomyces cerevisiael; the preparation method comprises the following steps: cultivating and fermenting each strain respectively, then, mixing the strain culture liquid according to proportion, absorbing the strain culture liquid by the absorption carrier so as to obtain the composite microbial agent; drying at a low temperature until moisture content is less than 30%; inoculating the composite microbial agent to the fermenting carrier, and carrying out mixed fermentation for 28-30 days so as to obtain a product. The preparation method is characterized by simple technology without using special equipment; prepared microbial organic fertilizer can boost crop increase production and improve product quality; in addition, environment stink can be eliminated effectively; and environment can be purified.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a bio-fertilizer made from paper-making sludge by combining microbial technology and a preparation method thereof. Background technique [0002] The paper industry is one of the important basic industries of my country's national economy. At the same time, the paper industry is also a processing and manufacturing industry with high resource and energy consumption intensity, large polluting industries, and large environmental impact. According to statistics, in 2007, the total amount of wastewater treatment sludge in my country's paper industry was about 3 million to 4 million tons. Papermaking sludge is a kind of biological solid waste. It not only contains a large amount of cellulose organic matter and plant nutrients such as nitrogen, phosphorus and potassium, but also contains pathogens, which is easy to rot and smell. Due to the relative shortage of landfill sites, it is common f...

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Problems solved by technology

[0003] It is found that the publication number is CN1778771A, and in the invention patent application document named as the method for preparing organic compound fertilizer by using papermaking sludge, a method for preparing organic fertilizer by using papermaking sludge is provided. The proportioned sludge, nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer are mixed uniformly by a mixer to form an organic fertilizer, so that it can use the fertilizer value of the papermaking sludge whose weight metal content is within the requirements of the national agricultural standard, and then mix it with Appropriate amounts of N, P, and K are used to make the sludge into a sludge compound fertilizer that is convenient to use and has good fertilizer efficiency; however, the moisture content of the sludge used in this method is 5%-10%, which is difficult to achieve by conventional methods. The moisture content of the invented sludge is 55%~70%

The Chinese Patent Publication No. is CN144677A, titled "Organic Fertilizer Prepared from Sewage Sludge", which provides a kind of organic fertilizer that utilizes Shanghai urban sewage sludge and adopts original bacteria from Changbai Mountain in Northeast China to form an ecological flora and ferment it into an organic fertilizer. , but this method is limited to the use of municipal sludge for civil use to prepare organic fertilizers. Due to the high content of crude fiber in papermaking sludge, it is not easy to degrade, so the scope of application of this method is small

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