An economical environmental-friendly composite fertilizer containing active sludge and a preparing method thereof

Abstract

An economical environmental-friendly composite fertilizer containing active sludge is disclosed. The fertilizer is characterized in that: the fertilizer is prepared from following raw materials by weight in part: 55-59 of oil tea cake, 40-44 of peanut bran, 39-43 of paulownia saw dust, 40-45 of straw powder, 50-55 of chicken manure, 9-11 of kaolin, 3-5 of humic acid, 2-4 of fern root powder, 7-9 of an EM bacterial agent, 8-9 of potassium salt of fulvic acid, 1-2 of ferric sulfate, 20-24 of the active sludge, 10-14 of calcium superphosphate, 25-29 of urea, 6-8 of a soil conditioning agent and a proper amount of water; the fertilizer is economical and environmental friendly; the active sludge is fermented into organic fertilizers and is cooperated with inorganic element fertilizers, the fertilizer efficacy is good, and the fertilizer can increase the crop yield and effectively improve the soil quality; the soil conditioning agent is added, and therefore the fertilizer has functions of promoting efficacy and promoting plant nutrition absorption; and urea melting coating is adopted so that the slow release effects are significant and the fertilizer efficacy is durable.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to an economical and environment-friendly compound fertilizer added with activated sludge and a preparation method thereof. Background technique [0002] At present, my country's agriculture is developing rapidly. my country is not only a big agricultural country, but also a big country in the use of fertilizers. The application and development of fertilizers are getting more and more attention. In order to meet the needs of the development of agricultural modernization, the production of fertilizers is developing in a diversified direction such as high-efficiency compound fertilizers and multi-functional fertilizers. [0003] With the continuous development of environmental protection in my country, urban sewage treatment plants have been built in large numbers all over the country, and the problem of the treatment and utilization of a large amount of activated sludge by-products has be...

AI Technical Summary

Problems solved by technology

Activated sludge contains four-fifths of water and one-fifth of suspended organic matter, including bacteria, harmful microorganisms, humus and heavy metal complex substances. Due to the complex composition and viscous state of activated sludge, its Disposal and utilization has become a difficult problem. So far, there is no mature technology for efficient and harmless treatment or utilization of activated sludge, and it is still in a state where landfill, incineration or a small part of composting are likely to cause secondary pollution; therefore, my country It is also necessary to increase the investment in this subject to realize the efficient and comprehensive utilization of activated sludge that is completely harmless and resource-based