Bidirectional ventilation and pneumatic pile-turning composting process

A composting method and air pressure technology, applied in organic fertilizers, fertilization devices, climate change adaptation, etc., can solve the problems of void ratio loss, pile overturning, odor and aerosol pollution, etc., to reduce volume demand and increase speed , the effect of slowing down the flow rate

CN101062872AActive Publication Date: 2007-10-31TONGJI UNIV
0 Cites 17 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2007-10-31

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a bidirectional flow ventilation and air pressure composting method, which comprises the following steps: dwelling pile body with height at 2-2. 5m and upper margin at 0. 5-1. 0m in box compost reactor; inserting three heat indicators and three pile body gap gas sampling pipe into different height; adopting 0. 1-0. 2m3 / min fixing air quantity per m3 initial compost raw material and batch process; venting; changing the direction of ventilation when the biggest differential temperature more than 5 deg. c of the three heat indicators; turning over the pile at the second day for one time one day; compressing the air with impulse; discharging momentary; making the pile body float and drop; testing oxygen concentration of the gas in the pile body per 15 min; finishing the compost when the biggest differential value less than 1. 0% of adjacent twice. This invention possesses low operating cost without twice pollution, which can be used to the compost of life garbage, agricultural waste and sludge of the waste water treatment plant.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] A two-way ventilation and air pressure turning composting method, relating to a composting main fermentation process, specifically a composting main fermentation process for domestic garbage, agricultural waste, and sewage treatment plant sludge, belonging to the technical field of solid waste treatment and resource utilization . Background technique

[0002] Composting technology has an ancient history, and has been widely used in modern society for the harmless treatment of wastes rich in biodegradable organic matter, such as household garbage, agricultural waste, sludge from sewage treatment plants, etc., and the products of composting ( Compost) is also rich in humus and plant nutrients, suitable for land use, so that composting technology has resource value at the same time.

[0003] The main mechanism of the composting process is that the organic matter in the raw material is degraded and converted into stable organic...

Examples

Embodiment Construction

[0021] Please refer to Fig. 1 and 2, the specific embodiment of the present invention is as follows.

[0022] Treatment object: 100t / d of dewatered sludge from sewage treatment plant, moisture content 80%, before composting, adjust the moisture content of the mixture to 60% according to the conventional requirements of the composting process, mix it with broken straw in a weight ratio of 1∶0.4 Mixing, so that the moisture content of the mixture is adjusted to 60%, the actual composting material volume is 140t / d, and the material bulk density is 0.6t / m 3 .

[0023] Main processing equipment: box-type composting reactor 1 is a container-type structure. According to the requirements of the amount of materials handled per day above, the calculated stacking volume is 233m 3 , the stacking height is 2.33m, and the reactor width is 5m, so the reactor length is 20m, and a 0.87m high buffer space is left above the material stack. A gas distribution layer 20 with a height of 0.3m is ...