CN1232458C

CN1232458C - Repair process with river mud repair material for sewage treatment

Info

Publication number: CN1232458C
Application number: CNB011059540A
Authority: CN
Inventors: 章永泰
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-12
Filing date: 2001-04-12
Publication date: 2005-12-21
Anticipated expiration: 2021-04-12
Also published as: CN1310136A

Abstract

The present invention relates to a repair process of a river mud repair material for sewage treatment, which particularly to has the following steps: a base material is pulverized into particles with certain particle diameter size, and the particles are mixed to be activated to form a base material with a plurality of holes; the dosage of the base material which is activated reaches a river mud covering layer whose thickness is more than 1cm, bacteria are added in water uniformly, and then, oxygen charge and aeration are carried out. After 5 to 6 days, a flocculant is added, or the base material is put in the river bottom to form an inorganic fixing layer whose thickness is more than 1cm. The oxygen charging and the aeration are carried out for 2 to 3 days, and the flocculant is added again to form the inorganic fixing layer whose thickness is more than 1cm.

Description

The method that the waste water control river bottom mud is repaired

Technical field

What the present invention relates to is the method that a kind of waste water control river bottom mud is repaired, and belongs to the waste water control field.

Summary of the invention

In the purification of water quality process of great water bodies such as river course, lake, reservoir, be a comparatively problem of difficulty to the processing of contaminated bed mud.Method commonly used at present is desilting, promptly adopt the mode of damming, digging bed mud, though this method can be removed pollutants in sediments, but quantities is big, the need personnel are many, expense is high, the bed mud that digs out also can form secondary pollution, and this method is when being used for water quality and administering, and water body also can only be kept the cleaning of certain hour, along with entering of pollutent, the new pollution formation bed mud that can precipitate again.In traditional sewage treatment process, there is the sandstone of employing to make filter bed, utilize sandstone gap between particles some oarse-grained organic suspension materials that dam, but the less organic suspension material of particle is difficult to remove, those water miscible organic substances just can't be removed at all; And the sandstone filter bed must carry out back flushing in operation behind the certain hour, and the macrobead suspended matter that wherein dams can cause secondary pollution again.Through retrieval to prior art, so far do not find the reported in literature identical with technical scheme as yet with technical theme of the present invention, in analysis to the prior art document, Japanese Patent is arranged, application number is: the flat 4-139800 of special hope, the invention people is secondary east, river, and denomination of invention is: with the material and the use thereof of biological method processing.This filtering material is used for water body purification more, but can not be used to repair river bottom mud, and filtering material carbon/nitrogen is more uncomfortable as administering the repair materials that is rich in the bed mud of nitrogen in the river course than low.

Summary of the invention the objective of the invention is to overcome deficiency of the prior art, the method that provides a kind of waste water control river bottom mud to repair.

Technical scheme of the present invention is as follows: the present invention utilizes river mud repair material for sewage treatment, mainly comprise: the substrate material of making by coal dust and/or oat bar and/or materials such as China fir and/or linden, be attached to the composite flora on the substrate carrier, wherein composite flora mainly comprises: yeast and/or milk-acid bacteria and/or photosynthetic bacterium and/or wire bacterium and/or aspergillus, flocculation agent is a polyacrylamide solution, the concentration of polyacrylamide is controlled at 1～2mg/l, and dosage compares at 0.8: 1～1: 1 with carrier bulk.

Renovation technique is specific as follows: the particle that 1. earlier base material is crushed to certain size, pulverized coal particle is that to be width become the following size particles of 2mm less than the thin slice of 2mm and/or China fir and/or linden for 1-50 order and/or oat bar, carry out activation treatment after the mixing, formation has the porous base material, has bigger specific surface area, for the implantation of microorganism provides more adsorption surface;

2. be added to activated treated base material in the river course equably, its dosage reaches more than the 1cm for the bed mud level of coverage, after base material is deposited on the riverbed fully, Xiang Shuizhong adds bacterial classification equably, according to the water pollution situation, bacterium liquid dosage is controlled at 10mg/l concentration, carry out oxygenic aeration then, after 5-6 days, a large amount of microorganisms growth and breeding on these carriers is arranged, add flocculation agent at last, perhaps drop into the carrier substrate that the composite flora implantation is arranged more than the 1cm of river bed thick, carried out oxygenic aeration 2～3 days, and added flocculation agent again, progressively at the inorganicization immovable bed that forms on the river bottom mud more than one deck 1cm.

When carrier substrate with microorganism or when being added in the water in batches, at first contact with water body, constantly make water body obtain biological degradation in the settling process, treat just constantly to be attached to when microorganism further is diffused into the river bed a large amount of breeding growths on the carrier substrate, the microorganism bed mud that deepens continuously, and make it obtain biological degradation.Utilize microorganism to make polluted bed mud obtain degraded, according to the microorganism life condition, the nutrition source that the microorganism living necessities are certain, (it is 50-80 that the general soil microorganism needs C: N: 1) to need to keep certain proportion between each nutrition source.Coal dust, oat bar, China fir, the contained separately carbon-nitrogen ratio difference of linden in the base material of the present invention adopt different ratios to mix the carrier substrate that can reach different carbon-nitrogen ratios according to the water pollution situation, and the carrier substrate carbon-nitrogen ratio of making is more than 250: 1.Like this, growth microorganism existence thereon has enough carbon sources but lacks nitrogenous source, when microorganism is in the nitrogen hunger state, attached to the microorganism on the base material just engulf in a large number in the water with bed mud in nitrogen and other nutritive substances with synthetic self, like this, the nitrogenous source in the bed mud and other organic matters constantly are consumed and make inorganicization of bed mud.Simultaneously water body is carried out aeration fully reaction under aerobic condition by microorganism and top layer bed mud, make it inorganicization, microorganism progressively gos deep into the bed mud depths, make the deep layer bed mud also obtain decomposing and inorganicization, when immovable bed reaches 1cm when above, can effectively keep apart upper strata water body and bed mud, microorganism gos deep into bed mud with keeping, nitrogenous source is constantly degraded, reluctant phosphate anion in the water, the difficult organism that decomposes of various heavy metal ion and various macromole is all covered by inorganic layer and can not be discharged in the water, can add base material and microorganism in actual applications in batches, make inorganicization of bed mud degree increase through repeatedly adding repair materials, inorganicization layer is more and more thicker, like this, formed the immovable bed of inorganicization of one deck on river bottom mud, endogenous pollution has obtained control fully.For ease of using, in the waste water control of great water body, drop in the water again after can making repair materials earlier, making work can aboard ship be finished, and is covered in the bed mud surface along with hull mobile is added to the korneforos equably to the base material of inoculating flora, carries out oxygenic aeration simultaneously, also can reach effect same, make and make and use a step to finish, saved manpower and materials, and efficient height, expense are low.

The present invention has substantive distinguishing features and marked improvement, after in great water body governance processes such as river, lake, reservoir, water body and bed mud being isolated with the method for inorganicization of bed mud, the water body that in the water body treating process water body is carried out oxygenic aeration and cause flows and bed mud is started and influences water quality, solved the problem of sediment pollution source to the influence of upper strata water quality, also saved simultaneously the heavy work of desilting, the saving fund, non-secondary pollution is efficient, the clean novel method that solves sediment pollution.

Embodiment

Below further provide example again to performance of the present invention:

Example 1: getting muddy water amount sum is 0.1m ³, wherein the thick about 0.15m of bed mud gets nearly bed mud place mud mixture, and post precipitation is got supernatant liquor and measured: CODcr is 38.3mg/l, ammonia-nitrogen content (NH ₃-N) be 10.5mg/l, BOD ₅Be 14.7ppm.Carrier substrate employing 30～50 purpose coal dusts and width are less than the oat bar of 2mm, mixed with mass ratio 8:2, and after activated processing, the amount that adds reaches the above thickness of 1cm, adds an amount of bacterium liquid after 1-2 hour, drops into the interior bacterial concentration of back water body about 10mg/l, behind the oxygenic aeration in a week (aeration rate 1.3 litres of air per minute), microorganism has a large amount of implantations, and the polyacrylamide flocculant that adds 1mg/l makes substrate forming, and dosage is identical with the base material volume.Getting the water of muddy water interface equally measures: this moment, water body CODcr reduced to 13.6mg/l, ammonia nitrogen (NH ₃-N) reduce to 0.4mg/l, BOD ₅Reduce to 4.2mg/l, water quality is brought up to III class water from the original V class water that is inferior to.After two months, CODcr remains on about 10mg/l, ammonia nitrogen (NH ₃-N) about 0.3mg/l, the more important thing is that the bed mud mud layer significantly decreases, reduce to 12-10cm from original 15cm, the reduction of bed mud is at 3～5cm, and the top layer bed mud has been tangible inorganicization state, and the following thick bed mud of about 1cm in top layer presents canescence, the bed mud on top layer has formed the close integral body of matter, stoped the diffusion of pollutants in sediments in water that is covered under it, under continuous aerobic condition, the bed mud of severe siltation descends more than 1/3 through making its thickness after inorganicization.

Example 2: getting muddy water amount sum is 0.1m ³, wherein the thick about 0.15m of bed mud gets nearly bed mud place mud mixture, and post precipitation is got supernatant liquor and measured: CODcr is 38.3mg/l, ammonia-nitrogen content (NH ₃-N) be 10.5mg/l, BOD ₅Be 14.7ppm.Adopt the China fir and the linden of 10～30 purpose coal dusts, the following particle diameter of 2mm to make carrier substrate with the mixed of mass ratio 7:2:1, the activated processing of base material, compound biological bacterium liquid and carrier substrate are blended in 20 ℃ cultivated 4～5 days down, make microorganism a large amount of breeding growths on base material.The carrier substrate of attached microbial is dropped in the water, dosage reaches and covers the above thickness of bed mud 1cm, carry out oxygenic aeration (aeration rate 1.3 litres of air per minute), the polyacrylamide flocculant that adds 2mg/l makes substrate forming, and dosage is the 0.8:1 of base material volume.Getting the water of muddy water interface equally measures: this moment, water body CODcr reduced to 11.2mg/l, ammonia nitrogen (NH ₃-N) reduce to 0.4mg/l, BOD ₅Reduce to 3.6mg/l, water quality is brought up to III class water from the original V class water that is inferior to.After two months, CODcr remains on about 10mg/l, ammonia nitrogen (NH ₃-N) about 0.3mg/l, the more important thing is that the bed mud mud layer significantly decreases, reduce to 12-10cm from original 15cm, the reduction of bed mud is at 3～5cm, and the top layer bed mud has been tangible inorganicization state, and the following thick bed mud of about 1cm in top layer presents canescence, the bed mud on top layer has formed the close integral body of matter, stoped the diffusion of pollutants in sediments in water that is covered under it, under continuous aerobic condition, the bed mud of severe siltation descends more than 1/3 through making its thickness after inorganicization.

Claims

1, a kind of method of waste water control river bottom mud reparation is characterized in that the method for reparation is:

1. base material is made by coal dust and/or oat bar and/or China fir and/or linden, adopt 30～50 purpose coal dusts and width oat bar less than 2mm, with 8: 2 mixed of mass ratio, perhaps adopt the China fir and the linden of 10～30 purpose coal dusts, the following particle diameter of 2mm to make carrier substrate with 7: 2: 1 mixed of mass ratio

Earlier base material is crushed to the particle of certain size, pulverized coal particle be 1-50 order and/or oat bar to be width become the following size particles of 2mm less than the thin slice of 2mm and/or China fir and/or linden, carry out activation treatment after the mixing, form and have the porous base material;

2. be added to activated treated base material in the river course equably, its dosage reaches more than the 1cm for the bed mud level of coverage, after base material is deposited on the riverbed fully, Xiang Shuizhong adds bacterial classification equably, carry out oxygenic aeration then, after 5-6 days, a large amount of microorganisms growth and breeding on these carriers is arranged, add flocculation agent at last, perhaps drop into the carrier substrate that the composite flora implantation is arranged more than the 1cm of river bed thick, carried out oxygenic aeration 2-3 days, and added flocculation agent again, at the inorganicization immovable bed that forms on the river bottom mud more than one deck 1cm.