Biological preparation by aiming at urban sludge treatment

Abstract

The invention discloses a biological preparation by aiming at urban sludge treatment. The biological preparation is prepared from biological extracts of Chinese honeylocust fruits, radix et rhizoma rhei, radix asparagi, bighead atractylodes rhizome, radix euphorbiae lantu, flaxseed, aloe and the like according to a certain proportion; the biological preparation has high activity inhibition effectson staphylococcus aureus, escherichia coli tritirachium album, fusarium, botrytis cinerea and rhizoctonia solani; raw liquid in a water solution is prepared from the following major ingredient: 5 to7 percent of Chinese honeylocust fruits, 2 to 4 percent of radix et rhizoma rhei, 5 to 7 percent of radix asparagi, 5 to 7 percent of bighead atractylodes rhizome, 5 to 7 percent of radix euphorbiae lantu, 3 to 5 percent of flaxseed and 5 to 8 percent of aloe. In the use process, the biological preparation is diluted by water to reach 1 to 200 times, better 25 to 150 times and optimal 50 to 100 times. The biological preparation simultaneously has the complexing action for eliminating free harmful heavy metal; further, nanoporous innocuous and innocent aerogel is added for adsorbing free stateheavy metal ions; then, ultraviolet light is used for irradiation for completely killing remaining bacteria; finally, dewatering and drying are performed to obtain a powdery organic solid fertilizer;storage and transportation can be further performed while granulation is performed. The biological preparation has the characteristics that the investment is low; the practicability is high; no secondary pollution exists; the wastes are comprehensively utilized.

Description

technical field [0001] The invention relates to the technical field of sludge treatment by bioengineering technology, in particular to a biological preparation for urban sludge treatment. Background technique [0002] With the development of social economy and urbanization, the generation and quantity of urban sewage are constantly increasing. According to relevant predictions, the amount of urban sewage in my country will increase significantly in the next 20 years, and the sewage discharge in 2010 will reach 4.4×1010m3·d-1. At present, my country's annual output of dry sludge is nearly 3×106t. With the development of domestic sewage treatment business, the total treatment water volume and treatment degree of sewage treatment plants continue to expand and improve, and the amount of sludge produced will also increase day by day. A large amount of sludge has not been treated in a timely and reasonable manner, which has become a heavy burden for sewage treatment plants. [0...

AI Technical Summary

Problems solved by technology

[0007] The sludge wet oxidation method has the disadvantages of high temperature and high pressure, complex equipment, and high operation and maintenance costs; earthworms process sludge and obtain organic fertilizers through earthworm purification, but there are large areas, long processing time, and processed earthworms. Enrichment of heavy metals, membrane bioreactor, purification is relatively thorough, but the clogging of the membrane and the price of membrane materials limit the popularization and application of this method; the basic principle of sludge acidification is to return the excess sludge to the wastewater treatment system after hydrolysis and acidification In order to achieve the purpose of reducing or basically no sludge discharge, this method is in the exploratory stage; the sludge artificial wetland treatment technology is a new technology under research, which cannot be applied on a large scale yet. Sanitary landfill is easy to operate. The investment cost is small, the treatment cost is low, and the adaptability is strong, but its land occupation is serious. If the anti-seepage technology is not enough, it will lead to potential soil pollution and groundwater pollution; sludge incineration requires a large investment in treatment facilities and high treatment costs. Incineration of organic matter will produce toxic substances; sludge throwing into the sea is a simple and economical treatment method. Governments of various countries have introduced policies to stop throwing into the sea to control pollution