CN-122010375-A - Emission reduction and stabilization control method for ammonia storage fermentation of fecal water mixture

CN122010375ACN 122010375 ACN122010375 ACN 122010375ACN-122010375-A

Abstract

The invention relates to the technical field of sewage treatment, and discloses a control method for ammonia emission reduction and stabilization of fecal water mixture storage fermentation, which is used for solving the problem that the fecal water mixture with continuous fluctuation of components and fermentation activity is difficult to realize cooperative control of ammonia volatilization inhibition and stabilization treatment in the storage fermentation process in the traditional method; according to the method, firstly, batch division and state identification are carried out on the materials in the pool, the volatilization risk state and the fermentation receiving state are determined, grading control, continuous rechecking and activity recovery processing are carried out in the storage stage, fermentation transition control is carried out after the transfer condition is met, and stable pushing, stabilization control and abnormal rollback processing are sequentially carried out in the fermentation stage, so that cooperative control of ammonia volatilization inhibition and stabilization processing in the process of storing and fermenting a fecal water mixture is realized.

Inventors

DU LIANZHU
MA YINGJUN
DU HUIYING
ZHANG KEQIANG

Assignees

农业农村部环境保护科研监测所

Dates

Publication Date: 20260512
Application Date: 20260409

Claims (10)

1. A control method for reducing emission and stabilizing ammonia during storage and fermentation of a fecal water mixture is characterized by comprising the following steps: The fecal water mixture entering the storage unit is processed and established, and the ammonia volatilization risk state and the fermentation receiving state are determined according to the material state after entering the tank; according to the ammonia volatilization risk state, corresponding storage control is carried out on the fecal water mixture, and hierarchical control is carried out on the liquid level state, the disturbance intensity, the liquid level change and the rechecking frequency; continuously performing state rechecking in the storage control process, and adjusting the storage control intensity according to the rechecking result, or executing activity recovery processing; After reaching the condition of the transfer section, transferring the fecal water mixture into fermentation transition control, and sequentially carrying out uniform mixing control, reflux control and liquid level adjustment; After the fermentation transition control is finished, fermentation stability control and stabilization control are sequentially carried out on the fecal water mixture, and corresponding control links are returned when abnormality occurs.
2. The method for controlling emission reduction and stabilization of ammonia fermentation stored in a fecal water mixture according to claim 1, wherein the steps of establishing a fecal water mixture entering a storage unit in a treatment process and determining an ammonia volatilization risk state and a fermentation receiving state according to a material state after entering a tank comprise: Batch merging or reclassifying the pond-entering materials according to the continuous pond-entering time period, the source unit and the front-end pretreatment consistency; establishing batch records, and judging multiple time points by combining the liquid level state, the temperature, the acid-base state, the solid content, the odor level, the foam state, the layering condition and the change after disturbance; dividing the volatilization risk level and the subsequent receiving level, and correspondingly determining the standing time, the rechecking time sequence, the liquid level change limit value, the disturbance limit and the return water merging rule.
3. The method for controlling emission reduction and stabilization of fermented ammonia stored in a fecal water mixture according to claim 1, wherein the corresponding storage control of fecal water mixture is performed according to the ammonia volatilization risk status, comprising: step adjustment is carried out on the storage process according to the ammonia volatilization risk level; standing and maintaining, reducing local foam, laying back the surface of the homologous liquid phase, and inhibiting disturbance or controlling low-intensity disturbance under a high risk state; in the risk state, adopting a liquid level adjusting mode of transition from partial coverage to continuous coverage; In low risk conditions a flat level is maintained and, if necessary, a gentle level dressing is performed.
4. The method for controlling ammonia emission reduction and stabilization in fecal water mixture storage fermentation according to claim 1, wherein the step control of the liquid level state, the disturbance intensity, the liquid level change and the rechecking frequency comprises the steps of: Setting a disturbance gear, a liquid level change control boundary and rechecking frequency according to the risk level; The method comprises the steps of carrying out instant rechecking after external disturbance, and correspondingly adjusting the feeding and discharging rhythm, disturbance intensity, liquid level change control boundary and risk level when liquid level overrun, foam expansion, liquid level cracking, layering aggravation, deposition increase or abnormal source definition occurs.
5. The method for controlling ammonia emission reduction and stabilization in fecal water mixture storage fermentation according to claim 1, wherein the continuous status check is performed during the storage control process, comprising: Setting instant rechecking, short-time rechecking and time delay rechecking for the current batch; Adopting consistent observation conditions at the same stage, and carrying out multi-time acquisition on the liquid level state, the foam state, the odor level, the layering condition, the deposition condition, the liquid level change, the external disturbance record, the temperature and the acid-base state; and judging according to the front and back rechecking changes, and taking the judgment as the basis for the subsequent control intensity adjustment.
6. The method for controlling ammonia emission reduction and stabilization in fecal water mixture storage fermentation according to claim 1, wherein the storage control intensity is adjusted according to the rechecking result or the activity recovery treatment is performed, comprising: Maintaining, down-regulating or up-regulating the current control intensity according to the continuous rechecking result; when continuous deterioration, thicker surface layer, increased local deposition, slow layering recovery or poor uniformity recovery occurs, carrying out zonal slow mixing, middle layer backflow redistribution, controlled surface layer loosening and observation after recovery; when recovery abnormality occurs, standing recovery, liquid level trimming and parameter callback are carried out, and the next control stage is carried out after the subsequent fermentation transition judgment condition is met.
7. The method for controlling the emission reduction and stabilization of ammonia fermentation stored in a fecal water mixture according to claim 1, wherein after reaching the condition of transition, the fecal water mixture is transferred to a fermentation transition control, comprising: switching a batch meeting the transfer condition and having the temperature and the solid content in a preset range into a fermentation transition state, setting an initial transition period, a balanced transition period and a confirmation transition period according to the difference of the connection or direct connection after the recovery, and recording the transfer time, the liquid level state, the odor grade, the foam state, the layering condition, the liquid level, the temperature, the solid content and the connection state; for batches that do not meet the transfer-in condition, the current storage control is continued or the activity recovery process is returned.
8. The method for controlling emission reduction and stabilization of ammonia fermentation stored in a fecal water mixture according to claim 1, wherein the mixing control, the reflux control and the liquid level adjustment are sequentially performed, comprising: The fermentation transition stage is carried out with sectional mixing, middle layer reflux and liquid level trimming; controlling the mixing action range of the first round in the initial transition period, and performing instant rechecking after mixing; Adjusting the mixing interval, the reflux ratio and the liquid level trimming mode according to the odor falling back, the foam change and the liquid level recovery condition in the equilibrium transition period; confirming the reduction of the operation frequency in the transition period, and judging according to the conditions of odor falling, foam lasting, liquid level recovery, liquid level stabilization and uniform recovery; When abnormality occurs, mixing and backflow are suspended, the observation window is shifted, and transition control is carried out again according to lower parameters or the precursor processing state is returned.
9. The method for controlling the emission reduction and stabilization of ammonia fermentation stored in a fecal water mixture according to claim 1, wherein after the fermentation transition control is finished, the fecal water mixture is sequentially subjected to fermentation stabilization control and stabilization control, comprising: After the transition control is finished, carrying out propulsion grade classification on the batch according to the conditions of liquid level recovery, odor falling, foam persistence, stable state after backflow and uniform recovery after turning, and setting mixing frequency, mixing time and backflow proportion according to the propulsion grade; After the continuous rechecking meets the transfer condition of stabilizing control, the active mixing frequency, the reflux ratio, the liquid level trimming mode and the rechecking interval are adjusted, and the low disturbance observation mode is adopted in the confirmation window before output to confirm the odor, the foam, the liquid level, the layering, the deposition and the liquid level state, so as to form the stabilizing record.
10. The method for controlling the emission reduction and stabilization of ammonia for storage and fermentation of fecal water mixture according to claim 1, wherein the method returns to the corresponding control link when abnormality occurs, and comprises the following steps: in the fermentation stage, abnormal discrimination is carried out on odor rising, foam sustaining, liquid level cracking, layering expansion, deposition increase, liquid level abnormality and local dead zone change; When the fermentation abnormality is judged, the propulsion level is regulated down and the reflux is suspended in sequence, and the control is switched back to the preamble transition confirmation control or the activity recovery treatment; When the stabilization abnormality is determined, the fermentation stabilization control is switched back to the fermentation stabilization control, and a fermentation stabilization period is added when the stabilization is continuously unstable; And adjusting mixing time, reflux ratio, observation key point and control period according to the temperature condition and the solid content state.

Description

Emission reduction and stabilization control method for ammonia storage fermentation of fecal water mixture Technical Field The invention relates to the technical field of sewage treatment, in particular to a method for controlling ammonia emission reduction and stabilization of fecal water mixture storage fermentation. Background The livestock and poultry raising process has the characteristics of high water content, large component change, high nitrogen conversion speed, unstable fermentation activity and the like, is easy to generate problems of ammonia volatilization, nitrogen loss, uneven subsequent stabilization degree and the like in storage and fermentation treatment, the prior art has researched emission reduction and recycling utilization in livestock and poultry manure treatment, for example, chinese patent application CN114632411B published in 22 10 months of 2024 discloses a nitrogen and carbon emission reduction method applied to livestock and poultry manure, the steps of feeding, temporary storage, treatment, storage and the like are regulated and controlled, and measures such as acidification, coverage, methane inhibition, carbon nitrogen ratio regulation, engineering parameter regulation and the like are adopted, and for example, chinese patent application CN101565333B published in 2012 02 month 15 discloses a system and a method for preserving nitrogen and phosphorus and reducing ammonia in livestock and poultry manure composting process, nutrient nitrogen and phosphorus retention and ammonia emission reduction in the composting process are realized through adding, so that the prior art can realize certain partial emission reduction and magnesium salt retention in manure treatment; However, the method still cannot effectively solve the problem that the ammonia volatilization inhibition and stabilization treatment in the storage fermentation of the fecal water mixture are difficult to cooperatively solve, mainly because the material state of the fecal water mixture can change along with the storage and fermentation time in the storage and fermentation processes, and the component ratio, the acid-base state, the degradable organic matter amount, the microbial activity and the like of the fecal water mixture have larger fluctuation, the prior art mainly uses the ammonia volatilization inhibition and stabilization control of a single link, the regulation of a single additive or the nutrient fixation in the fermentation process, lacks the technical method for continuously judging and cooperatively regulating the material state change process, leads to the failure of adapting the prior ammonia inhibition measure to the subsequent fermentation process, finally generates the phenomena of unstable ammonia emission reduction effect, blocked fermentation, unreserved nitrogen, and uneven final stabilization degree, thereby influencing the continuity of the fecal sewage treatment process, the recycling effect and the final product quality, and therefore, the method for controlling the ammonia volatilization inhibition and stabilization of the fecal water mixture storage fermentation is needed, and the problem that the ammonia volatilization inhibition and stabilization treatment in the fecal water mixture storage fermentation are difficult to cooperatively solve is effectively solved. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a control method for reducing emission and stabilizing ammonia during storage and fermentation of a fecal water mixture, which solves the problem that the fecal water mixture with continuously fluctuating components and fermentation activity is difficult to realize cooperative control of ammonia volatilization inhibition and stabilization treatment during storage and fermentation in the traditional method. In order to achieve the above purpose, the present invention provides the following technical solutions: A control method for reducing emission and stabilizing ammonia during storage and fermentation of a fecal water mixture comprises the following steps: The fecal water mixture entering the storage unit is processed and established, and the ammonia volatilization risk state and the fermentation receiving state are determined according to the material state after entering the tank; according to the ammonia volatilization risk state, corresponding storage control is carried out on the fecal water mixture, and hierarchical control is carried out on the liquid level state, the disturbance intensity, the liquid level change and the rechecking frequency; continuously performing state rechecking in the storage control process, and adjusting the storage control intensity according to the rechecking result, or executing activity recovery processing; After reaching the condition of the transfer section, transferring the fecal water mixture into fermentation transition control, and sequentially carrying out uniform mixing control, reflux contro