Recycling and emission reduction method of gases in sludge aerobic treatment

Abstract

The invention relates to the field of sludge treatment, in particular to a recycling and emission reduction method of gaseous substances in sludge aerobic treatment. The international patent classification (IPC) number of the invention is C02F1 / 74. The sludge aerobic treatment is divided into two stages, namely a main gas production stage and a microbiological gas production stage, wherein the gaseous substances generated in the main gas production stage are utilized to improve the active environment of microorganisms in the microbiological gas production stage, thus the microorganisms in the microbiological gas production stage can be used for further completing the oxygenolysis of organic substances and removing main smelly substances in the aerobic treatment; and finally the gases generated in the microbiological gas production stage are collected and discharged when meeting the related standard. By adopting the method provided by the invention in the sludge oxidation treatment process, according to the relation between the activity of microorganisms in sludge and the environment, the gases generated in the high temperature oxidation stage are recycled to improve and regulate the microbiological environment in the low temperature stage; in the entire process, no foreign microbial agent is used, and no biological deodorization equipment is required; and the investment cost and the operating cost are low, no smelly gases is discharged in the whole process, the production cycle is shortened, and the fertilizer efficiency of the product is greatly increased.

Description

1. Technical field [0001] The invention relates to the field of sludge treatment, in particular to a method for reusing and reducing gaseous substances in the process of aerobic treatment of sludge. Recycling and reducing emissions belong to the field of environmental protection technology, and its IPC international patent classification number is C02F1 / 74. 2. Background technology [0002] With the development of technology and the improvement of people's requirements for environmental quality, the control of odor pollution is becoming more and more strict. The gas produced during the static aerobic treatment of sludge is mainly CO 2 , NH 3 and water vapor. In addition, there are also local anaerobic environments to different degrees, and some different concentrations of H are produced to different degrees. 2 S gas. Controlling it is a main task in the process of sludge static aerobic treatment, and it has also become an indicator to measure whether the sludge treatmen...

AI Technical Summary

Problems solved by technology

These two methods have different degrees of disadvantages. The odorous substances produced in the sludge aerobic treatment process are the inevitable products of microbial activities, and the total amount is constant. The oxidation can be accelerated by controlling the process parameters or temporarily stored in the pile. It is temporarily feasible internally, but when the internal environment of the sludge pile changes, it will be released sooner or later, but it is not concentrated release, which is equivalent to the dilution of odorous substances

The above-mentioned problems also exist by adding specific strains, and with the continuous strengthening of the "General Technical Guidelines for Biosafety of Microbial Fertilizers", it will affect the safe application of sludge products, increase the cost of biological detection of strains and products, and increase the cost of sludge. Investment and operating costs for oxygen treatment

Images