CN1194907C

CN1194907C - Preparation of river mud repair material for sewage treatment

Info

Publication number: CN1194907C
Application number: CNB011059532A
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: CN1310135A

Abstract

The present invention relates to a fabrication process of a river mud repair material for sewage treatment. A carrier base material is heated and acidized, the temperature is controlled from 200 to 300 DEG C, the carrier base material is baked for about 2 hours at high temperature under the condition of isolated air, and the carrier base material is immersed for 2 to 10 hours by inorganic acid of hydrochloric acid whose concentration is from 1 to 10%, sulfuric acid, etc.; a compound bacterial colony is inoculated on the carrier base material to be cultured for 3 to 5 days at the normal temperature, and then, the carrier base material with the compound bacterial colony is put in water; or the carrier base material is put in a river channel first, and then, the compound biological bacterial colony is added in the water; finally, a macromolecular flocculant polyacrylamide solution whose concentration is controlled from 1 to 2 mg/l is added, and the ratio of the adding quantity and the carrier volume is from 0.8:1 to 1:1.

Description

The manufacture craft of river mud repair material for sewage treatment layer

Technical field

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

Background technology

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 layer 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, a kind of manufacture craft of river mud repair material for sewage treatment layer is provided.

Technical scheme of the present invention and performance are as follows: the river mud repair material for sewage treatment layer mainly comprises carrier substrate, is attached to the composite flora on the base material, and with flocculate polymeric flocculant on river bottom mud of carrier substrate.Carrier substrate is being made up of coal dust and/or oat bar and/or China fir and/or linden mainly, earlier the coal dust of bulk is broken into and is molecule, the control particle size range is between the 1-50 order, oat bar working width is in 2mm, and China fir and linden processing particle diameter are in 2mm, and the carbon-nitrogen ratio of carrier substrate reaches 250: 1, or according to the situation in actual river course, determine its carbon-nitrogen ratio, bigger carbon-nitrogen ratio makes microorganism growth that enough carbon sources be arranged and lacks nitrogenous source.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.Manufacture craft is: 1. carrier substrate is through high temperature, acidification, high-temperature control is baked and banked up with earth about 2 hours carrying out high temperature under the condition of 200～300 ℃ of secluding airs, adopting concentration is that mineral acids such as 1～10% hydrochloric acid, sulfuric acid soaked 2～10 hours, increased the specific surface area of carrier after treatment, for the microorganism growth implantation provides more adsorption space.2. composite flora is seeded on the carrier substrate, cultivated at normal temperatures 3-5 days, drop in the water then; Perhaps in the river course, add earlier carrier substrate, again the compound bio flora is added in the water, base material forms suspension rapidly in 30 minutes in water, and under aerobic condition, form special high-efficiency activated mud with composite flora, 3. add the polymeric flocculant polyacrylamide solution at last, its concentration is controlled at 1～2mg/l, and dosage compares at 0.8: 1～1: 1 with carrier bulk, the carrier substrate that is attached with bacterial classification is flocculated on contaminated river bottom mud, improve the self-purification capacity of water body.Carrier substrate has a constant carbon-nitrogen ratio, according to the microorganism life condition, the nutrition source that the microorganism living necessities are certain, when microorganism existence has had enough carbon sources but has lacked nitrogenous source, flora is in the nitrogen hunger state, after covering on the bed mud with the base material of microorganism, microorganism 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 and other organic matters constantly are consumed and progressively make inorganicization of bed mud.The repair materials layer is the mud shape and adheres to a large amount of plyability microorganisms, all can survive at aerobic and anaerobic condition, being covered on the river bottom mud behind the bio-carrier input water body, carry out an amount of aeration again, allow microorganism and top layer bed mud under aerobic condition, fully react, through the heavy knot of flocculation agent flocculation, make it inorganicization, and progressively go deep into bed mud bed mud is further decomposed and inorganicization, through repeatedly throwing in, inorganicization of bed mud degree increases, inorganicization layer thickens, like this, forming the immovable bed of inorganicization more than one deck 1cm on the river bottom mud, 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 microorganism in actual use in batches, along with the inorganic layer that makes the river bed bed mud thickens, water body and bed mud are isolated fully, and endogenous pollution has obtained control fully.

Embodiment

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

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.The making of carrier substrate: get earlier 1～10 purpose coal dust and be processed into width at 2mm with interior rolled oats with 8: 2 mixed of mass ratio, with water skiing acid solution is rinsed well fully after 2 hours with 8% sulfuric acid immersion again, under the condition of 200 ℃ of following secluding airs, baked and banked up with earth 2 hours then, the biological bacteria liquid that 10mg/l is mainly contained yeast and milk-acid bacteria mixes with carrier substrate at last, 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 0.8: 1 of base material volume, after one week, get the water of muddy water interface equally and measure: chemical oxygen demand (COD) (CODcr) is 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.The making of carrier substrate: get 20～30 purpose coal dusts and China fir and linden (China fir, linden particle are in 2mm) earlier with 8: 1: 1 mixed of mass ratio, with clear water acid solution is rinsed well fully after 10 hours with 10% hydrochloric acid acid soak again, under the condition of 300 ℃ of following secluding airs, baked and banked up with earth 2 hours then, the biological bacteria liquid that 10mg/l is mainly contained yeast and photosynthetic bacterium and aspergillus mixes with carrier substrate at last, 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 0.9: 1 of base material volume, after one week, get the water of muddy water interface equally and measure: chemical oxygen demand (COD) (CODcr) is 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, the making of carrier substrate: get 40～50 purpose coal dusts and rolled oats, China fir, linden earlier with mass ratio 7: 1; 1; 1 mixed, with clear water acid solution is rinsed well fully after 10 hours with 2% sulfuric acid immersion again, under the condition of 250 ℃ of following secluding airs, baked and banked up with earth 2 hours then, the biological bacteria liquid that 10mg/l is mainly contained milk-acid bacteria and wire bacterium and aspergillus mixes with carrier substrate at last, 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 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.

From last embodiment as can be seen, optimum of the present invention is done the water quality improvement 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 manufacture craft of river mud repair material for sewage treatment layer, it is characterized in that manufacture craft is: 1. 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, carrier substrate is through high temperature, acidification, high-temperature control is carried out high temperature and was baked and banked up with earth 2 hours under the condition of 200～300 ℃ of secluding airs, adopting concentration is that 1～10% hydrochloric acid, sulfuric acid mineral acid soaked 2～10 hours, 2. composite flora is seeded on the carrier substrate, cultivated at normal temperatures 3-5 days, and dropped in the water then; Perhaps in the river course, add earlier carrier substrate, again the compound bio flora is added in the water, base material forms suspension rapidly in 30 minutes in water, and under aerobic condition, form special high-efficiency activated mud with composite flora, 3. add the polymeric flocculant polyacrylamide solution at last, its concentration is controlled at 1～2mg/l, and dosage compares at 0.8: 1～1: 1 with carrier bulk.

2, the manufacture craft of this river mud repair material for sewage treatment layer according to claim 1, it is characterized in that, the repair materials layer is the mud shape and adheres to a large amount of plyability microorganisms, being covered on the river bottom mud behind the bio-carrier input water body, carry out an amount of aeration again, through the heavy knot of flocculation agent flocculation, through repeatedly throwing in, inorganicization of bed mud degree increases, and inorganicization layer thickens, and is forming the immovable bed of inorganicization more than one deck 1cm on the river bottom mud.