Bottom sediment improvement and in-situ reduction technique

Abstract

The invention discloses a bottom sediment improvement and in-situ reduction technique. The bottom sediment improvement and in-situ reduction technique comprises the following steps: adding 200-260 g of a bottom sediment antidote in each square meter of bottom sediment; adding 500-600 g of a surfactant and 100-150 g of a bottom sediment improver; adding 1-5 L of a microbial flora. The bottom sediment improvement and in-situ reduction technique completely eliminates the poisonous and harmful pollution of the water body caused by the agriculture and the industry, implements in-situ reduction on the bottom sediment, and solves the endogenous pollution; the effect lasts long, no engineering desilting is needed; the problems of repeated treatment and repeated investment are solved, the treatmentand remediation period of the water body is shortened; the organic matters of ammonia, nitrogen and phosphorus are removed at the same time, the tolerance of salinity is high, various enzyme systemsare applied to different environments of the bottom sediment; the problems are non-corrosive and nonirritating, are safe and environmentally friendly to human and animals, have no residues, and causeno pollution; the targeting microorganism improves the macrofaunal ecology, the bottom sediment is loosened and activated, the dissolved oxygen of the mud-water interface is increased; the phenomena that the water is turbid, dirty, viscous and foul or has chromatic aberration are eliminated, and phosphide, sulfide, oil, polycyclic aromatic hydrocarbonare and the like are effectively removed.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a bottom sludge improvement and in-situ reduction technology. Background technique [0002] NABIR, the American Association for Natural and Artificial Bioremediation Research, believes that bioremediation is the degradation of harmful organic pollutants in soil, water, sludge or residues or the conversion of harmful inorganic pollutants to a level that does not cause harm to the environment through the action of organisms. Another foreign scholar believes that bioremediation is a process of accelerating the natural degradation of toxic substances in soil or water. Chinese scholars generally believe that bioremediation is the use of specific organisms (including microorganisms, indigenous or exogenous microorganisms, and plants, etc.) to eliminate or enrich environmental pollutants under certain conditions, so as to restore the polluted environment. process. ...

AI Technical Summary

Problems solved by technology

However, so far, although some microorganisms have been found to be able to decompose organic substances such as PAH and PCBs to a large extent through pure culture, the current effect is not ideal to make products that can actively decompose organic substances in situ.

In addition, the degradation of organic matter by microorganisms requires suitable environmental conditions, such as temperature, pH value, nutrient composition, and electron acceptors. However, in on-site treatment, many factors that affect biological activity are often difficult to control, so it is difficult to achieve the maximum biological activity. value

[0009] The main problem of biological treatment of sediment is that the organic matter in the sediment is low in water solubility, and it is generally believed that the degradation rate of organic matter is affected by the concentration of the liquid phase, and microorganisms can only use the organic matter in the liquid phase, but not the organic matter in the solid phase. The bioavailability of organic matter in the sediment is low and the degradation rate is slow