Quick starting method of step-by-step biofilm culturing of river biofilm restoration system

Abstract

The invention provides a quick starting method of step-by-step biofilm culturing of a river biofilm restoration system. The method comprises the following steps: A, hanging a filling material in an SBR reactor, taking activated sludge as inoculation sludge, injecting simulation sewage good in biodegradability into the SBR reactor to form a culture solution, performing uniform mixing and aeration for 5 days, and changing the simulation sewage once every other day; B, taking the filling material from the SBR reactor and putting the filling material in a river simulation biofilm reactor, the bottom of which is uniformly provided with aerators, wherein the river simulation biofilm reactor is operated in an intermittent aeration manner and discharges the supernatant during an aeration-stopping period, and filling the river simulation biofilm reactor with new low-pollution water, and performing repeated operation for 2-3 days in an intermittent aeration manner; and C, taking river deposit out, removing the upper overlaying water, removing animal and plant impurities through screening, laying the river deposit at the bottom of the river simulation biofilm reactor, and performing sealed aeration for 3-5 days. Quick starting of biofilm culturing is achieved, the obtained biofilm enriches functional microorganisms, and the river biofilm restoration system can be stably operated.

Description

technical field [0001] The invention relates to the technical field of bioremediation of river water bodies, in particular to a rapid start-up method for a biofilm system of river restoration step by step. Background technique [0002] At present, various point and non-point source pollution such as urban domestic sewage, industrial wastewater, agricultural sewage, domestic garbage and initial rainwater invade urban water bodies, and the water environment of urban rivers is polluted to varying degrees. Nitrogen, phosphorus and organic pollutants generally exceed the " Surface water environmental quality standard (GB3838-2002) class IV water standard, water body presents eutrophication state, causes phytoplankton to reproduce vigorously, consumes dissolved oxygen in water, directly causes water body to turn black and smelly, seriously affects ecological security and human beings healthy. [0003] Biofilm method is a widely used sewage (waste) water biological treatment and w...

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Problems solved by technology

[0002] At present, various point and non-point source pollution such as urban domestic sewage, industrial wastewater, agricultural sewage, domestic garbage and initial rainwater invade urban water bodies, and the water environment of urban rivers is polluted to varying degrees. Nitrogen, phosphorus and organic pollutants generally exceed the " Surface water environmental quality standard (GB3838-2002) class IV water standard, water body presents eutrophication state, causes phytoplankton to reproduce vigorously, consumes dissolved oxygen in water, directly causes water body to turn black and smelly, seriously affects ecological security and human beings healthy

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