CN101731091A

CN101731091A - Method for preparing multifunctional flower cultivating soil in unban garden by hydrolyzing sludge

Info

Publication number: CN101731091A
Application number: CN200910273155A
Authority: CN
Inventors: 李亚东; 王行国; 杨兰芳; 倪红; 李海波; 李龙盘
Original assignee: Hubei University
Current assignee: Hubei University
Priority date: 2009-12-11
Filing date: 2009-12-11
Publication date: 2010-06-16

Abstract

The invention provides a method for preparing multifunctional flower cultivating soil in an unban garden by hydrolyzing sludge, comprising the following steps of: hydrolyzing and filtering the sludge at high temperature, then curing the sludge after natural stacking and fermentation, and adding 0.2%-5% of water-retaining agents to prepare the multifunctional flower cultivating soil of the unban garden. After the sludge is treated, a large number of protein and heavy metal ions are removed, pathogenic microorganisms are killed, and the hardening function of a flocculating agent is destroyed. When used for cultivating flowers in the garden, the multifunctional flower cultivating soil in the unban garden can realize the functions of being free of watering, fertilization and soil loosening, has the advantages of simple operation and water consumption cost and labor cost saving, and overcomes the defects of biological pollution and resource shortage existing in the traditional flower cultivating soil in the garden.

Description

Utilize hydrolyzing sludge to prepare the method for multifunctional flower cultivating soil in unban garden

Technical field

What the present invention relates to is to prepare landscape flower to cultivate with native method, particularly a kind of method of utilizing hydrolyzing sludge to prepare multifunctional flower cultivating soil in unban garden.

Technical background

Mud is the sediment that sewage treatment plant produces in the processing procedure of purifying waste water, it generally is the mixture of primary sludge and second pond activated sludge, it comprises solid particles such as silt particle in the sewage, fiber, plant and animal residues and the floccule that condenses thereof, integrated solid materials such as the metallic element of various colloids, organic matter and absorption, microorganism, germ, worm's ovum, weed seed, wherein the activated sludge content of organics is up to 60%～70%.Primary sludge is meant the mud through one-level sedimentation basin or primary clarifier output, the second pond activated sludge is the cotton-shaped particle of forming based on aerobic bacteria, except that adsorbate also all different protozoas of its surface attachment, metazoa, form the micropopulation of a complexity, very strong biologically active is arranged, in sewage disposal process, it has the ability of very strong absorption, oxidation and decomposing organic matter, when inactive state, has good settling property again, so claim activated sludge.At present the sludge yield in China every year is increasing progressively with 10% speed approximately, 2006,661 in China establishes and builds together into 791 of sewage treatment plants in the city, city, about 1,730,000 t of sludge yield (dry weight), and in continuous increase, caused for the second time and polluted, how rationally disposing sludge has become very urgent task.

The early stage sludge treatment form of China mainly is a landfill, directly farmland (soil) utilizes, burns, fills out the sea and throws aside.Raising and development of science and technology along with environmental consciousness, filling out the sea is under an embargo, directly farmland (soil) utilizes and throws aside because of poisonous and harmful substance contaminated soil in the mud is subjected to strict restriction, and mud mainly is the recycling of mud landfill and mud at present.Because the national conditions difference, the degree and the mode of country variant and regional sludge treatment there are differences.All there is deficiency in said method, is not desirable method.

The main kind of conventional landscape flower soil is: loam, leaf mould, peat soil, river sand (or plain sandy soil), wood chip (or sawdust), rotted leaf (pulverizing), pine needle (pulverizing) etc. are deceived in the mountain area.Selected materials quantity is selected materials by volume during preparation flower nutrition soil.Because of containing abundant natural plants somatotropin humic acid in the peat soil, be specially adapted to cuttage seeding with the flower nutrition soil of its preparation and produce callus and root of hair, can improve the survival rate of cottage propagation nursery stock greatly.Mud nutrition soil: the mud of municipal sewage plant contains relatively abundant organic nutrition composition and nitrogen, phosphorus, potassium, can replace fertilizer to a certain extent, increases soil fertility, and be good soil conditioner.

Existing landscape flower soil: be mainly derived from garbage loading embeading factory, the rubbish of landfill more than 10 years is excavated, sieves, sterilizes, promptly become flower cultivating soil and sell, be widely used in lawn, flower bed, flowerpot, nursery stock transplanting etc., annual big city consumes 200,000 tons approximately.But in fact, there is the danger of biological pollution and chemical contamination in this soil, and on the one hand, part spends soil supply producer not with the refuse soil sterilization, do not carry out heavy metal ion content simultaneously and measure, and price is between 100～120 yuan.

Between above-mentioned Treatment of Sludge, disposal, recycling present situation, and landscape flower soil present situation, propose to utilize hydrolyzing sludge to prepare the technical thought of multifunctional flower cultivating soil in unban garden.

Summary of the invention

The present invention proposes a kind of with quicklime hydrolysis mud and remove by filter filtrate (being used for other field), residual residue is hydrolyzing sludge, with hydrolyzing sludge ageing method processing by fermentation, adding water-loss reducer again mixes, promptly prepare the method for the multi-functional landscape flower soil of exempting to apply fertilizer, exempting to water, need not the process of loosening the soil, the loaded down with trivial details property of complex operations processes such as need loosening the soil, apply fertilizer, often water when overcoming the plantation landscape flower.The present invention is achieved in that its method is:

1, mud is mixed in 100: 6 ratio with lime; Be put in the reactor, feed the high-temperature steam hydrolysis of 0.6-0.7Mp;

2, at high temperature 145-155 ℃ of following hydrolysis 1-2 hour;

3, remove by filter protein solution containing (being used for other field);

4, the residue of Guo Lving is a hydrolyzing sludge;

5, spontaneous fermentation, maturation process 15-20 days;

6, the water-loss reducer (as the rich board HI-SWEEL of millet super moisture absorbing resin, French SNF water-loss reducer, sodium carboxymethylcellulose, xanthans) that adds 0.2-5% again mixes, and promptly makes multifunctional flower cultivating soil in unban garden.

Directly plant the gardens flower plant during use, need not fertilising, but water conservation rained during this period and can recover its water retention characteristic about 40 days.

Mechanism of the present invention is such, mud contains a large amount of microorganisms, rich in proteins, phosphorus, materials such as potassium, usually as fertilizer, but owing to contain heavy metal ion, thereby as fertilizer sources usage amount and scope be restricted, and can not directly use as landscape flower soil simultaneously, because of nitrogen, phosphorus content is too high and poison, therefore, with the proteolysis in the mud and remove by filter, also go out the plurality of heavy metal ion through hydrolysis simultaneously, its nitrogen, phosphorus, the soil that the content of potassium is equivalent to apply fertilizer, because through high temperature treatment, the residue quality is loose ventilative, slaking by fermentation again, add water-loss reducer, make it meet the requirement of landscape flower soil.Use can realize exempting from watering, exempt from the operating process of applying fertilizer, exempting to loosen the soil in landscape flower cultivation.

The present invention has unique advantage.

1, the characteristics that mud contains a large amount of protein (nitrogen), phosphorus, potassium have been made full use of.Mud has become the serious problems of sewage disposal process, has caused for the second time and has polluted, and this invention can realize the recycling of mud, and cost is low, function is complete, easy to operate.

2, this multifunctional flower cultivating soil in unban garden is layed in Anywhere, directly plants or transplant various ornamental plants, for the first time through after watering or raining, plant gets final product well-grown, need not to refertilize, water, and under 35-38 degree hot weather, but 28-40

It need not water, and can solve water conservation characteristics once more in case rain.Remove the complex operations of manually watering from and reach water-saving purpose.

3, this multifunctional flower cultivating soil in unban garden is as being used for family garden, and can reach watered in 1 year gets final product for 1-2 time, avoids not causing flowers withered because of watering, and realizes floriculture at home, supports careless convenience.

As: multifunctional flower cultivating soil in unban garden is directly paved, sowed tall fescue seed or direct transplanting scarlet sage flower seedling, density is unrestricted, plant gets final product well-grown, need not to rewater, rain once in a while and can satisfy the plant growing moisture requirement, in family's use, can be with in the multi-functional landscape flower soil in city, the direct plantation of ornamental plant, after once watering, rewater after can reaching half a year, as in positions such as balconies, can water plant grew well.

Embodiment

The present invention is further described below in conjunction with embodiment.

Embodiment 1 stacks the fermentation maturation process after 15-20 days naturally with hydrolyzing sludge, with water-loss reducer (as the rich board HI-SWEEL of millet super moisture absorbing resin, French SNF water-loss reducer, sodium carboxymethylcellulose, xanthans) and hydrolyzing sludge according to 0.2-5.0: 100 ratio mixes, and can prepare the multi-functional landscape flower soil in city;

Embodiment 2 lays the city of embodiment 1 multi-functional landscape flower soil arbitrary height, plantation Aztec marigold, azalea, camellia Festuca Arundinacea plant are operated layout, plant grew well routinely, the fertilising that need not to water, demonstration place: in Wuhan Urban Drainage Development Co., Ltd..

Embodiment 3 is positioned over the multi-functional landscape flower soil in the city of embodiment 1 in the flowerpot, plantation Festuca Arundinacea, cigarette seedling, be positioned over platform, under Wuhan City's 35 degree hot weathers, can realize 25 need not to water more than it (usually at this moment between in will rain, can realize water conservation once more), plant grew well, contrast only needs 7-10 days, and plant is all dead; Almost need water once with the top half a year and be planted in indoor flowers.

Claims

1. method of utilizing hydrolyzing sludge to prepare multifunctional flower cultivating soil in unban garden is characterized in that method is:

1), mud is mixed with lime in 100: 6 ratio and mix;

2), at high temperature 145-155 ℃ of following hydrolysis 1-2 hour;

3), remove by filter protein solution containing;

4), residue is a hydrolyzing sludge;

5), spontaneous fermentation, maturation process 15-20 days;

6) add the water-loss reducer of 0.2-5%, again, mix, promptly make multifunctional flower cultivating soil in unban garden, water-loss reducer is the rich board HI-SWEEL of millet, perhaps super moisture absorbing resin, perhaps French SNF water-loss reducer, perhaps sodium carboxymethylcellulose, perhaps xanthans.