Method for preparing biological carbon soil by static aerobic composting of sludge

Abstract

The invention discloses a method for preparing biological carbon soil by static aerobic composting of sludge, which comprises the following steps of: (1) preparing materials: taking the following components in part by weight: 100 parts of fresh sludge, 40 to 50 parts of return mixture and 15 to 20 parts of sludge composting conditioner; (2) stacking the mixture to a strip stack; (3) arranging an online temperature probe at an interval of 20 to 40 meters in the formed strip stack, and arranging a controller in control connection with the temperature probe; (4) performing dynamic mechanical stack turning and static aerobic ventilation; (5) repeating the operation of the step (4) for 15 to 18 days, wherein in the process, the temperature of more than 55 DEG C in the strip stack is maintained for 5 to 6 days, the water content of the sludge of the strip stack is reduced to be less than 40 percent, and the strip stack forms recyclable biological carbon soil; (6) sieving, packing, storing and transporting the biological carbon soil; and (7) arranging a deodorization device in a composting workshop. The method is suitable for innocent treatment of the sludge generated by sewage treatment, has complete process and good effect, is simple and convenient to operate, and does not pollute the environment.

Description

technical field [0001] The invention relates to a technology in the field of sewage treatment, in particular to a technology for treating sludge generated in the process of sewage treatment. The technology performs static aerobic composting treatment on the sludge to reduce the water content of the sludge and disinfect it. Sterilize, deodorize, and sieve to make biological carbon soil. Background technique [0002] With the continuous improvement of my country's sewage treatment capacity, the sludge generated in sewage treatment is also increasing, and the problem of sludge treatment and disposal has clearly emerged. As we all know, my country is in the stage of rapid development of sewage treatment plants. In 2003, the national sewage treatment rate was 42.39%, and in 2007 it had reached 62.9%. In 2008, 1,529 urban sewage treatment plants were put into operation across the country, treating 23.3 billion cubic meters of sewage and producing about 16 million tons of sludge w...

AI Technical Summary

Problems solved by technology

However, the current sludge composting technology is not perfect enough, and the equipment and process are relatively simple. Using forklifts, tractors and other sludge turning methods has low efficiency, poor turning and mixing effects, and the sludge void ratio and stacking type cannot be guaranteed.

At the same time, in the actual operation process of mechanical turning and throwing, the operation frequency and timing are difficult to grasp, which makes it difficult to improve the efficiency and effect of sludge composting, and the effect efficiency and product quality of sludge treatment are not ideal.