Method for catalytic humification of sludge organic matter
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A technology of organic matter and humification, applied in the field of sludge resource utilization, to achieve the effects of saving operating costs, accelerating humification, and increasing content
Active Publication Date: 2019-07-12
TSINGHUA UNIV
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Problems solved by technology
The main bottleneck of sludge accelerated humification process lies in the efficiency, rate and application cost of catalytic humification
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Embodiment 1
[0047] Embodiment 1, take pig iron scrap as catalyst, catechol is the sludge catalytic humification of precursor additive
[0048] 1. The amount of catechol added is 5mg / g sludge dry basis
[0049] (1) Raw material and formula
[0050] The moisture content of dewatered municipal sludge is about 80%, and the organic matter (volatile solid) content is about 55% (dry basis).
[0051] The materials were prepared according to the following formula, the total material of each formula was 100kg: pig iron filings: dehydrated municipal sludge = 4:1; the amount of catechol added was 5mg / g sludge dry basis.
[0052] (2) Method
[0053] according to figure 1 The process flow chart shown carries out the catalytic humification of sludge, and the specific steps are as follows:
[0054] 1) The material is crushed, and the particle size of pig iron chips after crushing is 0.2-0.5cm;
[0055] 2) mixing materials, according to the ratio of the above formula, fully mixing the dehydrated muni...
Embodiment 2
[0062] Embodiment 2, the sludge catalytic humification with iron oxide and catechol as additives
[0063] (1) Raw material and formula
[0064] The moisture content of dewatered municipal sludge is about 80%, and the organic matter content is about 55% (dry basis).
[0065] Prepare the materials respectively according to the following formula, each formula has a total material of 100kg: dehydrated municipal sludge: iron oxide = 10:1; the amount of catechol added is 100mg / g sludge dry basis.
[0066] (2) Method
[0067] according to figure 1 The process flow chart shown carries out the catalytic humification of sludge, and the specific steps are as follows:
[0068] 1) The material is crushed, and the particle size of iron oxide chips after crushing is 0.2-0.5cm;
[0069] 2) mixing materials, according to the ratio of the above formula, fully mixing the dehydrated municipal sludge, iron oxide and catechol to obtain the mixed materials;
[0070] 3) Mix the mixed material wi...
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Abstract
The invention discloses a method for catalytic humification of sludge organic matters. The method comprises the step of performing aerobic fermentation on the sludge. Iron-containing matter (such as, raw iron chips and ferric oxide) is taken as the catalyst for aerobic fermentation and phenolic compound (such as, catechol) is taken as an additive. A result shows that the mass ratio of sludge to iron-containing matter is 4:1; the dosage of the phenolic compound is 100mg phenolic compound / g dry sludge basis; after aerobic fermentation for 15-25 days, the humic acid content in the sludge is 37.91-144.60% higher than that in the original sludge. According to the method provided by the invention, the humification process of sludge composting can be quickened and the humic acid content in the sludge composting product also can be increased; a large amount of sludge-base organic fertilizer rich in humic acid can be supplied; the land utilization can be performed without secondary compost; the iron-containing matter as the catalyst can be used as the catalyst for new sludge composting and can be reused; the catalyst has a function of accelerating the sludge composting humification; the running cost can be obviously saved.
Description
technical field [0001] The invention relates to the field of sludge resource utilization, in particular to a method for catalyzing the humification of sludge organic matter. Background technique [0002] With the vigorous advancement of my country's urbanization and industrialization, people's requirements for the quality of the living environment are constantly improving. The treatment capacity of sewage treatment facilities is increasing year by year, and the treatment degree is deepening. The sludge generated in the sewage treatment process is growing explosively. The annual production of urban wet sludge (80% moisture content) in China has increased from 15 million tons in 2008 to 42 million tons in 2014. Sludge has the characteristics of high moisture content, high organic matter content, and high viscosity. At the same time, it is enriched in pollutants such as pathogenic bacteria, heavy metals, and parasite eggs. If it is not handled properly, it will easily pose a hu...
Claims
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