Preparation of natural fertilizing material

Details Preparation of natural fertilizing material Preparation of natural fertilizing material

1987-04-16

1989-02-14

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Organic material-containing

71 13, 71 27, 71903, 71904, C05F 700, C05F 300

Patent

active

048044024

ABSTRACT:
A method and plant are provided for sterilizing waste sewage sludge with methyl bromide vapor, to produce a natural fertilizing material. The moisture content of the sludge is reduced to a level where the vapor permeability of the sludge is sufficiently high to reduce the contact period of the methyl bromide vapor with the sludge to an economically viable level. The methyl bromide is provided at a dose of at least 50 g/m.sup.3 to the top of a bed of sewage sludge having a moisture content of less than 35% and about 1 meter thick and allowed to permeate the bed over a period of about 48 hours under the force of gravity, the bed of sewage sludge being covered during the entire treatment period with a cover which is impermeable to the methyl bromide vapor. Harmful pathogens and parasites such as Ascaris ova are effectively eliminated.

REFERENCES:
patent: 3445383 (1969-05-01), Horvath
patent: 4056380 (1977-11-01), Thiac
patent: 4280656 (1986-04-01), Cohen et al.
Enigk et al (Enigk), Zentrablatt fuer Bakteriologie Abt 1, Origionale, vol. 179, pp. 397-432 (1960).

Affiliated with

Also associated with

Rating

Preparation of natural fertilizing material does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preparation of natural fertilizing material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of natural fertilizing material will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1363401