Method for producing fertilizer by utilizing mud and plant straws

Abstract

The invention discloses a method for producing a fertilizer by utilizing mud and plant straws, mainly comprising the following steps with the mixture of concentrated mud and plant straw powders as theraw material and one or a plurality of ammonium sulfite, sodium sulfite and potassium hydrogen sulfite as the stewing decay agent: the stewing decay agent accounting for 8-15 percent of the reduced dry weight of the raw material and the raw material are mixed uniformly, and are stewed at the temperature of 125-170 DEG C for 2-7 hours to obtain the semi-finished product of slurry organic fertilizer which can be directly prepared into commercial organic fertilizer; or appropriate amount of chemical fertilizers such as nitrogen, phosphor, kalium and trace elements are added into the semi-finished product to prepare organic-inorganic composite fertilizer; or the semi-finished product is separated to prepare an organic kalium liquid fertilizer and an organic ammonium liquid fertilizer. The method has simple technology, the decay conversion speed of raw materials is fast, and the purposes of sterilizing, decontaminating and deodorizing the raw material can be realized with the method; the product has high organic content and humic acid content, is sulfur-bearing, and has high fertilizer efficiency; and with the method, the large-scale and low-cost fertilizer utilization of the mud and plant straw waste is realized.

Description

technical field [0001] The invention relates to a method for producing fertilizer by using a mixture of sludge and plant straw, and belongs to the technical field of resource utilization and pollution prevention and control. Background technique [0002] With the development of industry and cities, the discharge of industrial and urban domestic sewage is gradually increasing, and the organic wastewater is mainly treated by biological methods, resulting in a rapid increase in the amount of sludge produced. How to solve the way out of sludge treatment and disposal has become a major environmental problem to be solved urgently in the process of industrial and urban development in various countries. It is known that the main component of sludge is cellular organic matter, and also contains nitrogen, phosphorus, potassium and various trace elements, and the water content is generally 70% to 85%. Crop straw is a biomass agricultural waste with many types and a very large amount o...

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Problems solved by technology

Chinese patent literature, application number: 96122252.2 reports that sodium sulfide, carbon disulfide and a small amount of sodium pyrophosphate, tetrabutylate additives are mixed with sludge from urban sewage treatment plants, and heat treated at 80-85°C and 90-95°C for 1 hour respectively , 1.5 to 2 hours, then filter, the filtrate is further processed to obtain the so-called organic acid fertilizer, the filter residue is discarded after sintering, the water content of the filtrate obtained by this method is too high, and the reaction raw material carbon disulfide used has peculiar smell

To sum up, there is no report on the method of using straw and sludge mixture to produce fertilizer in the prior art