CN1194908C

CN1194908C - River mud repair material for sewage treatment

Info

Publication number: CN1194908C
Application number: CNB011059559A
Authority: CN
Inventors: 章永泰
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-12
Filing date: 2001-04-12
Publication date: 2005-03-30
Anticipated expiration: 2021-04-12
Also published as: CN1310137A

Abstract

The present invention relates to a river mud repair material for sewage treatment, which mainly comprises a carrier base material, a compound bacterial colony and a polymer flocculant which flocculates the carrier base material on the river channel mud, and the compound bacterial colony is attached to the carrier base material, wherein the carrier base material comprises coal powder and/or oat stems and/or Chinese fir and/or linden. The compound bacterial colony comprises saccharomycete and/or lactic acid bacteria and/or photosynthetic bacterium and/or linear bacteria and/or aspergillus, and the flocculant is polyacrylamide.

Description

River mud repair material for sewage treatment

What the present invention relates to is a kind of repair materials, and particularly a kind of river mud repair material for sewage treatment belongs to the waste water control field.

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.Charcoal absorption is another kind of traditional sewage treating material, gac also has more application in sewage disposal, but gac costs an arm and a leg, the life-span lacks, through retrieval, do not find the reported in literature identical with technical scheme so far as yet, in analysis to the prior art document with technical theme of the present invention to prior art, Japanese Patent is arranged, application number is: the spy is willing to flat 4-139800, and the invention people is secondary east, river, and denomination of invention is: with the material and the use thereof of biological method processing.This material is used for water body purification more, but this filtering material is not suitable for the reparation river bottom mud, and this material carbon/nitrogen is not suitable for the repair materials that is rich in nitrogen mud in the polluted river channel than low.

The objective of the invention is to overcome deficiency of the prior art, a kind of river mud repair material for sewage treatment that is used for is provided.

Technical scheme of the present invention and performance are as follows: the present invention mainly comprises: carrier substrate, be attached to the composite flora on the carrier substrate, and with flocculate polymeric flocculant on river bottom mud of carrier substrate, carrier substrate comprises: coal dust and/or oat bar and/or China fir and/or linden are formed, coal dust is by granulometric composition between 1～50 order, the width of oat bar is in 2mm, China fir, the linden particle diameter at 2mm with endoparticle, base material is through high temperature and acidification, temperature is controlled at 200～300 ℃, adopting concentration is that mineral acids such as 1～10% hydrochloric acid or sulfuric acid soak, make base material become porous mass, the specific surface area that tool is bigger, for composite flora growth implantation provides more adsorption space, made carrier substrate is for microbial growth provides the place.The carrier substrate carbon-nitrogen ratio of making as stated above is about 250: 1, composite flora comprises: yeast and/or milk-acid bacteria and/or photosynthetic bacterium and/or wire bacterium and/or aspergillus, elder generation on carrier substrate, cultivated bacterial classification inoculation 3-5 days at normal temperatures, dropped in the water then; Or elder generation adds carrier substrate in the river course, again multiple platform flora is added in the entry, base material forms suspension rapidly in water in 30 minutes, and under aerobic condition, form special high-efficiency activated mud with composite flora, add polymeric flocculant at last, flocculation agent is meant polyacrylamide solution, and concentration of polyacrylamide is controlled at 1～2mg/l, and dosage compares at 0.8: 1～1: 1 with carrier bulk.Carrier substrate is sunk under water, under the effect of flocculation agent, be covered in above the contaminated river bottom mud, improve the self-purification capacity of water body.

The mechanism of river mud repair material mainly is: carrier substrate has a constant carbon-nitrogen ratio, according to the microorganism life condition, the nutrition source that the microorganism living necessities are certain, it is 50～80: 1 that the general soil microorganism needs C: N, the carbon-nitrogen ratio of carrier substrate remains on a higher numerical value usually＞＞50, microorganism existence has had enough carbon sources but has lacked nitrogenous source, it is in the nitrogen hunger state, after the base material with microorganism covers the river bed, attached to the microorganism on the base material just engulf in a large number in the water with bed mud in nitrogen with synthetic self, other organic matter is degraded by microorganisms too in the bed mud, like this, the nitrogenous source in the bed mud constantly is consumed and makes inorganicization of bed mud.

Material of the present invention is the mud shape and adheres to a large amount of composite floras, all can survive at aerobic and anaerobic condition, being covered on the river bottom mud behind the bio-carrier input water body, abundant reaction under aerobic condition makes it inorganicization by microorganism and top layer bed mud to carry out an amount of aeration again, and progressively go deep into bed mud bed mud is further decomposed and inorganicization, make inorganicization of bed mud degree increase through repeatedly adding bio-carrier, inorganicization layer thickens, like this, on river bottom mud, formed the immovable bed that one deck has 1cm above thickness, can keep apart bed mud that contains a large amount of pollutents and upper strata current, microorganism gos deep into bed mud with keeping, ammonia nitrogen progressively is degraded, being difficult in the water handled phosphate anion, 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 carrier substrate and composite flora in actual use in batches, the inorganic layer of river bottom mud is thickened, even water body and bed mud are isolated fully, endogenous pollution has obtained control fully.

Example below further is provided:

Example 1: get a severe contamination river and implement river 0.1m ³, about 0.15m is thick for the bottom bed mud, gets nearly bed mud place mud mixture, and post precipitation is got supernatant liquor and measured: chemical oxygen demand (COD) (CODcr) is 38.3mg/l, ammonia nitrogen (NH ₃-N) be 10.5mg/l, biochemical oxygen demand (BOD) (BOD ₅) be 14.7mg/l.Get 1～10 purpose coal dust and be processed into width and make carrier substrate with interior oat bar sheet with 8: 2 mixed of mass ratio at 2mm, through high temperature acidified processing, the biological bacteria liquid that 10mg/l is mainly contained yeast and milk-acid bacteria mixes with carrier substrate, cultivated 4～5 days down at 20 ℃, 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, dosage is 0.9: 1 of base material volume, after one week, get the water of muddy water interface equally and measure: chemical oxygen demand (COD) (CODcr) is 13.6mg/l, ammonia nitrogen (NH ₃-N) be 0.4mg/l, biochemical oxygen demand (BOD) (BOD ₅) be 4.2mg/l.After two months, bed mud thickness has obvious variation, muddy water interface about 2～3cm that descends, the top layer bed mud is a canescence, show that this part mud layer has been inorganicization state, form the mineralising structure of the thick densification of about 1cm, this inorganic layer has been controlled the Xiang Shuizhong diffusion of the inner endogenous pollution of bed mud.

Example 2: get same polluted river and implement, river 0.1m ³, about 0.15m is thick for the bottom bed mud, and chemical oxygen demand (COD) (CODcr) is 38.3mg/l, ammonia nitrogen (NH ₃-N) be 10.5mg/l, biochemical oxygen demand (BOD) (BOD ₅) be 14.7mg/l.Get 25～35 purpose coal dusts and China fir and linden (China fir, linden particle are in 2mm) and make carrier substrate with 8: 1: 1 mixed of mass ratio, through high temperature acidified processing, the biological bacteria liquid that 10mg/l is mainly contained yeast and photosynthetic bacterium and aspergillus mixes with carrier substrate, cultivated 4～5 days down at 20 ℃, 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 1mg/l makes substrate forming, dosage is 0.8: 1 of base material volume, after one week, get the water of muddy water interface equally and measure: chemical oxygen demand (COD) (CODcr) is 11.6mg/l, ammonia nitrogen (NH ₃-N) be 0.4mg/l, biochemical oxygen demand (BOD) (BOD ₅) be 4.1mg/l.After two months, bed mud thickness has obvious variation, muddy water interface about 2～3cm that descends, the top layer bed mud is a canescence, show that this part mud layer has been inorganicization state, form the above fine and close mineralising structure of 1cm, this inorganic layer has been controlled the Xiang Shuizhong diffusion of the inner endogenous pollution of bed mud.

Example 3: with example 1 example 2 water-quality guideline, get 40～50 purpose coal dusts and rolled oats, China fir, linden with mass ratio 7: 1: 1: 1 mixed is made carrier substrate, through high temperature acidified processing, the biological bacteria liquid that 10mg/l is mainly contained milk-acid bacteria and wire bacterium and aspergillus mixes with carrier substrate, cultivated 4～5 days down at 20 ℃, 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 1mg/l makes substrate forming, dosage is 1: 1 in the base material volume, after one week, get the water of muddy water interface equally and measure: chemical oxygen demand (COD) (CODcr) is 12.2mg/l, ammonia nitrogen (NH ₃-N) be 0.4mg/l, biochemical oxygen demand (BOD) (BOD ₅) be 3.8mg/l.After two months, bed mud thickness has obvious variation, muddy water interface about 2～3cm that descends, the top layer bed mud is a canescence, show that this part mud layer has been inorganicization state, form the above thick fine and close mineralising structure of about 1cm, this inorganic layer has been controlled the Xiang Shuizhong diffusion of the inner endogenous pollution of bed mud.

From last embodiment as can be seen, optimum of the present invention is done the waste water control of pond, river, lake, reservoir.

The present invention has substantive distinguishing features and marked improvement, thereby fully contacting the bed mud that makes pollution with the bed mud that pollutes decomposes and inorganicization, form one deck fixed mineralising inorganic layer, under the condition of not desilting, control sediment pollution, guarantee in the water quality governance process, not to be subjected to the influence that pollutants in sediments discharges, have quantities little, need few, the cost saving of personnel, non-secondary pollution, effect are obvious, make to form the catalytic oxidation workspace that one deck has efficient degradation pollutent ability on the bed mud of governed water, greatly improved the self-purification capacity of water body.

Claims

1, a kind of river mud repair material for sewage treatment, it is characterized in that, comprise: carrier substrate, be attached to the composite flora on the carrier substrate, and with flocculate polymeric flocculant on river bottom mud of carrier substrate, carrier substrate comprises: coal dust and/or oat bar and/or China fir and/or linden are formed, the carrier substrate mass ratio is as follows: coal dust is than oat bar sheet 7-8: 1-2, coal dust was than China fir or linden 8: 1, composite flora comprises: yeast and/or milk-acid bacteria and/or photosynthetic bacterium and/or wire bacterium and/or aspergillus, flocculation agent is meant polyacrylamide solution.

2, according to the described this river mud repair material for sewage treatment of claim 1, its feature also is coal dust by granulometric composition between 1～50 order, the width of oat bar in 2mm, China fir, linden particle diameter at 2mm with endoparticle.

3, this river mud repair material for sewage treatment according to claim 1 and 2, its feature is that also the carrier substrate carbon-nitrogen ratio is about 250: 1.

4, this river mud repair material for sewage treatment according to claim 1, its feature is that also concentration of polyacrylamide is controlled at 1～2mg/l, dosage compares at 0.8: 1～1: 1 with carrier bulk.

5, this river mud repair material for sewage treatment according to claim 1, its feature also have been to form the immovable bed that one deck has the above thickness of 1cm on river bottom mud.