Special bank protection base material for treating black and odorous water body

Abstract

The invention discloses a special bank protection base material for treating a black and odorous water body. The special bank protection base material for treating the black and odorous water body isprepared by mixing 10%-50% of bentonite with 50%-90% of decomposed sludge, and the decomposed sludge is a product produced by compost fermentation of the sludge produced by an urban domestic sewage treatment plant. The invention discloses another special base material which is particularly prepared by mixing 10%-50% of bentonite and 50%-90% of an organic fertilizer. The production steps of the special base material are simple, only the selected decomposed sludge or organic fertilizer and the bentonite need to be uniformly mixed according to a required proportion, and then the mixture can be used. The special base material of the invention is good in water retention property and fertilizer retention property, and is suitable for growth of animals and microorganisms, the base material is high in capillary water holding capacity and small in volume weight, meanwhile, the maximum proportion of the decomposed sludge used in the invention can reach 90%, the utilization rate of the decomposedsludge is greatly increased, and the special bank protection base material for treating the black and odorous water body has a positive promotion effect on development of the sludge composting industry, and meanwhile, the area of the land occupied by traditional sludge landfill or stacking treatment is reduced.

Description

technical field [0001] The invention relates to a special base material for revetment for controlling black and odorous water bodies, in particular to a special base material for laying on the bank (or embankment) of the water body. Background technique [0002] Black and odorous water is a collective term for water that has an unpleasant color and / or emits an unpleasant smell. Because a large number of pollutants enter the water body, COD, nitrogen, phosphorus and other pollutants in the water body exceed the standard, the dissolved oxygen drops rapidly, and under anaerobic conditions, the action of microorganisms produces NH 3 、H 2 S, sulfide compounds and other odor-causing substances, as well as black-causing substances such as FeS and MnS, will cause the water body to become black and smelly. Generally, black and odorous water bodies are prone to appear in slow-flowing water bodies such as river ditches, ponds, and puddles. The existence of black and odorous water no...

AI Technical Summary

Problems solved by technology

[0010] (1) The revetment base material uses too much curing agent, so that the porosity of the revetment base material is not high, the air permeability is average, and the water retention and fertilizer retention are not good.

[0011] (2) The material used for the bank revetment base material is heavy, and the substrate has a high probability of slipping from the bank revetment. It needs to be fixed with fences or other methods, which increases the difficulty of construction and increases the cost

[0012] (3) The composition of the materials used in the revetment base material is complex and the production cost is high, which is not conducive to large-scale production and application

[0013] According to the inventor's actual investigation, sewage treatment plants in various places produce a large amount of sludge every year, and have not been effectively utilized. For example: Guangyuan City Green Mountain Environmental Protection Technology Co., Ltd. Domestic sludge is treated with sludge bio-composting to implement comprehensive utilization of resources. The annual sludge treatment volume is about 50,000 tons, and the water content of the sludge used is about 80%. The annual output of decomposed sludge is about 17,000 tons, and the water content is about 35%. The heavy metal content limits in the decomposed sludge are in line with the national standard of the People's Republic of China "Agricultural Sludge Pollutant Control Standards" GB4284-2018 Grade A However, due to the lack of understanding of such products, many users are resistant to sludge composting products, resulting in a poor outlet for decomposed sludge, and a large amount of hoarding seriously hinders The continuous operation of the sludge composting plant, so finding a suitable place for the decomposed sludge will play a positive role in the development of the entire sludge composting industry, and may even change the current industrial structure of the sludge treatment industry, which is mainly based on incineration and landfill. Turning to the resource utilization of sludge composting

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