CN-118812004-B - Nitrifying bacteria early warning system and method for sewage plant

CN118812004BCN 118812004 BCN118812004 BCN 118812004BCN-118812004-B

Abstract

The invention relates to the technical field of sewage treatment, and discloses a nitrifying bacteria early warning system and an early warning method for a sewage plant, wherein the early warning system comprises a first reactor, a second reactor and a central processing unit, wherein probes are arranged in the first reactor and the second reactor and are respectively used for detecting ammonia nitrogen concentration and pH value of a solution in the first reactor and the second reactor; the central processing unit is respectively connected with the first probe and the second probe and is used for acquiring data detected by the first probe and the second probe, analyzing and processing the acquired data, judging the activity state of nitrifying bacteria sludge in the nitrifying bacteria sludge tank according to an analysis result, and sending early warning to sewage which does not meet the requirements according to the analysis result. The early warning system has the advantages of simple and reliable structure, direct method, stronger pertinence and applicability, higher matching degree, visual effect, rapid and simple operation, and good repeatability, stability and quality control capability.

Inventors

WANG XUN
CAO WEI
LIU TENGFEI
LIU YUN
ZHANG LEIYAN
WU TIANFU
JU XINGHUA

Assignees

中冶生态环保集团有限公司

Dates

Publication Date: 20260505
Application Date: 20240904

Claims (9)

1. A nitrifying bacteria early warning method for a sewage plant is characterized in that a nitrifying bacteria early warning system for the sewage plant is adopted, and the nitrifying bacteria early warning system for the sewage plant comprises: the sampling mixing tank is used for collecting and containing sewage; A nitrifying bacteria sludge tank for accommodating nitrifying bacteria sludge; A solution preparation unit for preparing parallel sample solution; The first reactor is respectively connected with the sampling mixing tank and the outlet end of the nitrifying bacteria sludge tank, and is provided with a first probe for detecting the water quality parameters of the liquid in the first reactor; The second reactor is respectively connected with the solution preparation unit and the outlet end of the nitrifying bacteria sludge tank, and is provided with a second probe for detecting the water quality parameters of the liquid in the second reactor; The central processing unit is used for controlling the first reactor to be respectively communicated with sewage and nitrifying bacteria sludge, the second reactor to be respectively communicated with parallel sample solution and nitrifying bacteria sludge, the central processing unit is respectively connected with the first probe and the second probe in a signal manner and used for acquiring water quality parameters detected by the first probe and the second probe, the central processing unit forms a water quality parameter curve according to the received water quality parameters, analyzes and processes the acquired water quality parameters and the water quality parameter curve, judges the activity state of nitrifying bacteria sludge in the nitrifying bacteria sludge tank according to an analysis result, and sends out early warning to sewage which does not meet requirements according to the analysis result; Aeration devices are arranged in the sampling mixing tank, the first reactor, the second reactor and the nitrifying bacteria sludge tank; The nitrifying bacteria early warning method for the sewage plant comprises the following steps: The sewage in the sampling mixing tank is sent to a first reactor, the water quality parameter of the sewage in the first reactor is obtained, parallel sample solution is prepared according to the water quality parameter of the sewage, the water quality parameter comprises ammonia nitrogen concentration and pH value, the deviation between the water quality parameter of the parallel sample solution and the water quality parameter of the sewage is within the deviation threshold value range, and the parallel sample solution is sent to a second reactor; Respectively feeding nitrifying bacteria sludge into a first reactor and a second reactor from a nitrifying bacteria sludge tank, then starting aeration of the first reactor and the second reactor, respectively mixing sewage and parallel sample solutions with the nitrifying bacteria sludge to form a first solution and a second solution, respectively obtaining ammonia nitrogen concentration of the first solution and the second solution, fitting an ammonia nitrogen degradation curve according to ammonia nitrogen concentration values, and respectively calculating an ammonia nitrogen degradation slope K 1 and an ammonia nitrogen degradation slope K 2 ; Analyzing and treating the water quality parameters of the sewage in the first reactor to obtain an ammonia nitrogen concentration average value C 1 and a pH average value P 1 of the sewage, respectively comparing C 1 、P 1 with an ammonia nitrogen concentration threshold value C 0 and a pH threshold value, judging whether the quality of the inlet water meets the requirements according to the comparison result, and sending an early warning signal to the sewage which does not meet the requirements; Dividing the inhibitory hazard grade of nitrifying bacteria of the water quality of the inflow water and sending out an early warning signal according to the value of the ammonia nitrogen degradation slope K 1 and the ratio of K 1 to K 2 ; Comparing the ammonia nitrogen degradation slope K 2 with the ammonia nitrogen degradation slope K y , and judging the activity state of nitrifying bacteria sludge in the nitrifying bacteria sludge tank according to the comparison result, wherein K y is the ammonia nitrogen degradation slope of a standard mixed solution formed by the standard sewage solution and the standard active nitrifying bacteria sludge.
2. The nitrifying bacteria early-warning method for the sewage plant according to claim 1, wherein the water outlet end of the sampling mixing tank is communicated with the first reactor through a lifting metering pump, the outlet end of the nitrifying bacteria sludge tank is respectively communicated with the first reactor and the second reactor through lifting metering pumps, the outlet end of the solution preparation unit is communicated with the second reactor through lifting metering pumps, and any lifting metering pump is connected with the central processor.
3. The nitrifying bacteria early-warning method for the sewage plant according to claim 2, characterized in that the solution preparation unit comprises an ammonia nitrogen solution tank and a pH adjusting solution tank, wherein the ammonia nitrogen solution tank and the pH adjusting solution tank are connected with the inlet end of the second reactor through a lifting metering pump, and the lifting metering pump is connected with the central processor.
4. The nitrifying bacteria early-warning method for the sewage plant according to claim 2, characterized in that the nitrifying bacteria early-warning system for the sewage plant further comprises a nitrifying bacteria nutrient solution tank, wherein the nitrifying bacteria nutrient solution tank is connected with the nitrifying bacteria sludge tank through a lifting metering pump, and the lifting metering pump is connected with the central processor.
5. The nitrifying bacteria early warning method for the sewage plant according to claim 1, characterized in that an ammonia nitrogen concentration average value C 1 is compared with an ammonia nitrogen concentration threshold value C 0 , and if C 1 ＞C 0 , an early warning of too high ammonia nitrogen concentration in the sewage is sent out; And comparing the pH average value P 1 with a pH threshold value, and if the P 1 is not in the pH threshold value range, giving out early warning of abnormal pH value of the sewage.
6. The nitrifying bacteria early warning method for a sewage plant according to claim 1, characterized in that before the step of mixing sewage and parallel sample solutions with nitrifying bacteria sludge to form a first solution and a second solution, the method further comprises: acquiring water quality parameters of the parallel sample solution, and analyzing and processing the water quality parameters of the parallel sample solution to obtain an ammonia nitrogen concentration average value C 2 and a pH average value P 2 of the parallel sample solution; And respectively comparing the ammonia nitrogen concentration average value C 1 and the pH average value P 1 of the sewage with the ammonia nitrogen concentration average value C 2 and the pH average value P 2 of the parallel sample solution, and if the deviation of C 2 and C 1 and the deviation of P 2 and P 1 are within the deviation threshold value range, the parallel sample solution is qualified.
7. The method for pre-warning nitrifying bacteria in sewage plants according to claim 1, wherein the steps of classifying the inhibitory hazard level of nitrifying bacteria in water quality of inflow water and sending pre-warning signals according to the value of the degradation slope K 1 of ammonia nitrogen and the ratio of K 1 to K 2 comprise: If K 1 is more than or equal to 0, an early warning signal with the nitrifying bacteria inhibitory hazard level of I is sent out, if K 1 /K 2 is more than or equal to 0.2, an early warning signal with the nitrifying bacteria inhibitory hazard level of II is sent out, if K 1 /K 2 is more than or equal to 0.4, an early warning signal with the nitrifying bacteria inhibitory hazard level of III is sent out, if K 1 /K 2 is more than or equal to 0.6 and more than or equal to 0.4, an early warning signal with the nitrifying bacteria inhibitory hazard level of IV is sent out, and if K 1 /K 2 is more than or equal to 0.8 and more than or equal to 0.6, an early warning signal with the nitrifying bacteria inhibitory hazard level of V is sent out.
8. The nitrifying bacteria early warning method for the sewage plant according to claim 1, characterized in that the step of comparing the ammonia nitrogen degradation slope K 2 with the ammonia nitrogen degradation slope K y and judging the activity state of nitrifying bacteria sludge in the nitrifying bacteria sludge tank according to the comparison result comprises the following steps: If the deviation between K 2 and K y is within the deviation threshold range, judging that the activity state of nitrifying bacteria sludge in the nitrifying bacteria sludge tank is qualified; If the deviation between K 2 and K y is not within the deviation threshold range, judging that the activity state of nitrifying bacteria sludge in the nitrifying bacteria sludge tank is unqualified and the early warning signal is invalid.
9. The nitrifying bacteria early-warning method for the sewage plant according to claim 1, characterized in that the deviation of the average value of the ammonia nitrogen concentration of the standard mixed solution and the average value of the ammonia nitrogen concentration of the second solution and the deviation of the average value of the pH of the standard mixed solution and the average value of the pH of the second solution are all within a deviation threshold value range.

Description

Nitrifying bacteria early warning system and method for sewage plant Technical Field The invention relates to the technical field of sewage treatment, in particular to a nitrifying bacteria early warning system and method for a sewage plant. Background The sewage treatment plant is used as an indispensable public facility in the city and is positioned at the tail end of the city pipe network to bear the important responsibility of discharging the water environment terminal. Unlike domestic sewage, industrial waste water contains great amount of heavy metal, thiourea, toxic organic matter and other toxic inhibiting matter, and its effluent has various complicated, unstable and other features. Research shows that although the toxic substances have a certain correlation with the conventional detection physicochemical indexes, the conventional physicochemical indexes are difficult to reflect the comprehensive toxicity of the water quality, and once the water inlet of a sewage plant is impacted strongly by the toxic substances, a large number of toxic death phenomena can occur in microorganisms at the biochemical end of the sewage plant, the nitrification of nitrifying bacteria is inhibited, and even the breakdown of a sewage treatment biochemical system is caused. At present, most of integrated early warning equipment for monitoring inflow water quality of sewage plants in the market adopts a chemical method to early warn nitrifying bacteria high-inhibition sewage in inflow water quality, judges the activity state of nitrifying bacteria sludge, needs long time for detecting nitrifying bacteria, is about one hour, and has poor measurement accuracy due to complex related water quality condition. Therefore, how to provide a nitrifying bacteria early warning system and an early warning method for a sewage plant with short detection time and high measurement accuracy is a problem to be solved by those skilled in the art. Disclosure of Invention In view of the above, the invention provides a nitrifying bacteria early warning system and an early warning method for a sewage plant, which are used for solving the problems of long time and poor measurement accuracy of nitrifying bacteria detection process of integrated early warning equipment for monitoring inflow water quality of the sewage plant in the prior art. In order to solve the technical problems, the invention adopts the following technical scheme: In one aspect, the invention provides a nitrifying bacteria early warning system for a sewage plant, comprising: The first reactor can be communicated with sewage and nitrifying bacteria sludge, and is provided with a first probe for detecting the water quality parameters of liquid in the first reactor; the second reactor can be communicated with the parallel sample solution and the nitrifying bacteria sludge, the deviation of the water quality parameter of the parallel sample solution and the water quality parameter of the sewage is in the deviation threshold range, and the second reactor is provided with a second probe for detecting the water quality parameter of the liquid in the second reactor; the central processing unit is used for controlling the first reactor to be respectively communicated with sewage and nitrifying bacteria sludge, the second reactor to be respectively communicated with parallel sample solution and nitrifying bacteria sludge, the central processing unit is respectively connected with the first probe and the second probe in a signal manner and used for acquiring water quality parameters detected by the first probe and the second probe, the central processing unit forms a water quality parameter curve according to the received water quality parameters, analyzes and processes the acquired water quality parameters and the water quality parameter curve, judges the activity state of nitrifying bacteria sludge in the nitrifying bacteria sludge tank according to an analysis result, and sends early warning to sewage which does not meet requirements according to the analysis result. Preferably, the water quality parameters include ammonia nitrogen concentration and pH. Preferably, the water quality parameter curve comprises an ammonia nitrogen degradation slope curve. The device comprises a first reactor, a second reactor, a liquid preparation unit, a sampling mixing tank, a nitrifying bacteria sludge tank and a solution preparation unit, wherein the sampling mixing tank is used for collecting and containing sewage, the nitrifying bacteria sludge tank is used for containing nitrifying bacteria sludge, the liquid preparation unit is used for preparing parallel sample solution, the water outlet end of the sampling mixing tank is communicated with the first reactor through a lifting metering pump, the outlet end of the nitrifying bacteria sludge tank is respectively communicated with the first reactor, the second reactor and the nitrifying bacteria sludge tank through the lifting metering pump, and the o