CN103787489B

CN103787489B - A kind of water treatment method

Info

Publication number: CN103787489B
Application number: CN201310538203.1A
Authority: CN
Inventors: 耿旭; 吴华南; 任天志
Original assignee: Individual
Current assignee: Shenzhen Hailifang Biological Technology Co ltd
Priority date: 2013-11-01
Filing date: 2013-11-01
Publication date: 2016-04-20
Anticipated expiration: 2033-11-01
Also published as: CN103787489A

Abstract

The invention discloses a kind of water treatment method, comprising: Seaweed Extract and water mixing; Wherein, Seaweed Extract is the solid mixt extracted through physical treatment and/or chemical treatment by marine alga; Wherein, physical treatment comprises chopping, grinding, filtration, drying; Chemical treatment comprises extraction, neutralization, oxidation, absorption; Marine alga contains at least one in sea-tangle, kelp, bladder wrack, sargassun, black wrack, laver, gelidium.By Seaweed Extract and water mixing, be equivalent to, to the microorganism supply nutrition in water body, effectively to improve the metabolic rate of respective specific flora in water surrounding, promote that it grows; And the Fast-propagation of specific flora can grab nutritive substance limited in water body, thus suppress the growth of other floras or algae, namely suppress the biological accumulation be relatively harmful to, improve its purification ability of water body.

Description

A kind of water treatment method

Technical field

The present invention relates to a kind of water treatment method.

Background technology

In water treatment method, the technical measures of bioelectric detecting and biological restoration refer to the plant or cultivation, the biology of inoculation or the vital movement of microorganism that utilize and cultivate, shift, transform and degrade, thus water body is purified to water pollutant.Bioelectric detecting (comprising plant community, zoocenosis) reduces algae bio amount by rebuilding coenosis, keeps water quality limpid and improves species diversity, mainly comprise based on waterplant with fish, the zooplankton bioelectric detecting that is main body.The current problem of waterplant is that planting aquatic plants is more difficult on wawter bloom water body, and new plant introduction will evaluate its ecologic effect cautiously in addition.Zooplankton and some algophagous fish can control the generation of blue-green alga bloom to a certain extent, but population is difficult to be formed and stablize, and the effect of food chain is difficult to play comprehensively and control.Therefore, bioelectric detecting technology exists obviously not enough.Biological restoration utilizes naturally occurring or through the microorganism (or some matrix) of special screening and culturing, by microorganism or the metabolism of promotion microbial growth, the specific pollutants in environment is degraded, one of study hotspot becoming water pollution control in recent years, mainly contain following several types: (1) utilizes phycomycete relation to control harmful algae, comprises the suppression to algae of bacterium, fungi and virus; (2) microorganism is to the decomposition of water nutrition material, such as effective microorganism can significantly reduce Eutrophication Lake Water Determination of Chlorophyll, total nitrogen, total phosphorus.

Marine alga is submarine algae, and be botanic spore plant, principal character is: without vascular tissue, does not have the differentiating phenomenon of real root, stem, leaf; Do not bloom, without fruit and seed; Reproductive organ is without the protective tissue of specialization, often direct by single cell generation spore or gamete; And without the formation of embryo.At present, about the aquaculture water process of kelp is extensively studied by as an engineering problem.Name is called " a kind of method utilizing kelp to carry out water treatment ", publication number is that the Chinese patent application of CN102161530A discloses a kind of method utilizing kelp to carry out water treatment, kelp clonal cells is utilized to breed in water body, absorb the nitrogen phosphorus of water body, thus process eutrophication water.But the amount reproduction of marine alga easily blocks the parts such as pore; When marine alga excessive multiplication, the material that Algae toxins etc. is harmful also may be discharged.

Summary of the invention

The object of this invention is to provide a kind of water treatment method applying Seaweed Extract, improve water body self-purification ability.

The invention provides a kind of water treatment method applying Seaweed Extract, comprising: Seaweed Extract and water mixing; Wherein, Seaweed Extract is the solid mixt extracted through physical treatment and/or chemical treatment by marine alga; Wherein, physical treatment comprises chopping, grinding, filtration, drying; Chemical treatment comprises extraction, neutralization, oxidation, absorption; Marine alga contains at least one in sea-tangle, kelp, bladder wrack, sargassun, black wrack, laver, gelidium.

For different water treatment objects, as reduced chemical oxygen demand (COD) (COD), total nitrogen (TN) or total phosphorus (TP), select different Seaweed Extracts.Experiment proves, different Seaweed Extracts has corresponding suitable flora.By Seaweed Extract and water mixing, be equivalent to, to the microorganism supply nutrition in water body, effectively to improve the metabolic rate of respective specific flora in water surrounding, promote that it grows; And the Fast-propagation of specific flora can grab nutritive substance limited in water body, thus suppress the growth of other floras.Therefore, the present invention is by accelerating beneficial microorganism growth and breeding, reaches and recovers the original ecological functions of water body system, improve the beneficial effect of the self-purification capacity of water body own, avoid the amount reproduction of marine alga easily to block other drawbacks such as pore.

Accompanying drawing explanation

Embodiment

Below by embodiment, the present invention is described in further detail.

For different water treatment objects, as reduced COD, denitrogenation, dephosphorization, select different Seaweed Extracts.The marine alga raw material of Seaweed Extract can be derived from the one of green alga, red algae, brown alga etc., as sea-tangle, kelp, bladder wrack, sargassun, black wrack, laver, gelidium etc., can also be the mixture of different algal species, as the mixture etc. of sea-tangle and bladder wrack.The process extracted can comprise physical treatment, as chopping, grinding, filtration, drying; And/or chemical treatment, as extraction, neutralization, oxidation, absorption.Generally, Seaweed Extract is solid mixt so that transport and preserve after treatment, in actual use, in advance Seaweed Extract can be dissolved in the water and form Seaweed Extract solution, then can omit dissolving step in use, easy to use.From the difference of solid-state Seaweed Extract, Seaweed Extract solution is only that form is different, its composition does not change.

Different Seaweed Extracts has corresponding suitable flora, by Seaweed Extract and water mixing, is equivalent to, to the microorganism supply nutrition in water body, effectively to improve the metabolic rate of respective specific flora in water surrounding, promote that it grows; And the Fast-propagation of specific flora can grab nutritive substance limited in water body, thus suppress the growth of other floras.In addition, generally containing molten algae element in Seaweed Extract, the growth of algae can be suppressed, thus improve its purification ability of water body.

Embodiment one:

The water body of the present embodiment is natural lake, and long-pending about 160 mu of lake surface, lake surface spreads unchecked by blue-green algae, causes lakebed mud to grow.Utilize Seaweed Extract to process this water body, object reduces lake silt content.The marine alga raw material of Seaweed Extract is selected from sea-tangle, and Seaweed Extract, with the mode of solution and water mixing, namely sprays to Seaweed Extract solution in lake.The process that Seaweed Extract solution mixes with lake water is divided into two stages, and the sprinkling frequency in each stage is monthly; First stage is spray concentration is 200ppm, sprays once altogether; Subordinate phase is spray concentration is 10ppm, sprays ten altogether once.In other embodiments, Seaweed Extract can be stage by stage with mixing of water body, and the concentration that different steps is sprayed is different with sprinkling frequency; Can also be single phase, spray weekly once as fixing, each concentration of spraying be identical.

Table 1 is the relation for the treatment of time and silt depth in the present embodiment, within the 0th day, does not namely utilize Seaweed Extract to carry out the correlative value of water body process.After 10 days of first time sprinkling, find that the blue-green algae of lake surface disappears substantially by range estimation.After 30 days, silt from the bottom of lake amount reduces to 12.3cm from original 15.0cm, and minimizing amplitude is 18%.Along with the continuation of Seaweed Extract uses, lake surface blue-green algae stops growing, and silt from the bottom of lake amount also decreases progressively month by month.

In table 1 embodiment one, the relation for the treatment of time and silt depth

Treatment time/sky	0	30	60	90	180	360
							Silt depth/cm	15.0	12.3	11.8	11.3	10.2	9.8

Embodiment two:

The water body of the present embodiment is natural lake, and lake surface is long-pending is about 3000 mu.Lake is eutrophication water, and lakebed ammonia-nitrogen content is 2.3mg/L, and phosphorus content is 0.34mg/L, and wherein orthophosphoric acid salt content is 0.295mg/L.Utilize Seaweed Extract to process this water body, object reduces lake nitrogen and phosphorus content.The marine alga raw material of Seaweed Extract is selected from sea-tangle and bladder wrack, and quality group becomes sea-tangle: bladder wrack=1:1, and adopt Seaweed Extract solution to spray to mode in lake, spray concentration is 5ppm, spray frequency be every 7 days once.Because the Seaweed Extract concentration adopted is lower, and area of lake is comparatively large, therefore cooperative mechanical aeration aerating.In other embodiments, the mode such as nature drop water aeration oxygenation, blast aeration oxygenation can also be utilized, make dissolved oxygen remain on more than finite concentration, as 1mg/L, to ensure the oxygen consumption of flora.

Table 2 is relations for the treatment of time and nitrogen phosphorus in the present embodiment.Through the process of seven months, lakebed ammonia-nitrogen content, by 2.3mg/L before treatment, was reduced to <0.02mg/L, and minimizing amplitude is 99.1%; Total nitrogen content, by 2.6mg/L before treatment, is reduced to 1.0mg/L, and minimizing amplitude is 61.5%.Meanwhile, lakebed phosphorus content, by 0.34mg/L before treatment, is reduced to the 0.011mg/L after process, and minimizing amplitude is 96.8%; Orthophosphoric acid salt content, by 0.295mg/L before treatment, is reduced to the 0.003mg/L after process, and reduction amplitude is 99.0%.

In table 2 embodiment two, the relation for the treatment of time and nitrogen phosphorus

Example three:

The water body of the present embodiment is the water body in domestic sewage processing system, and the processing power of this domestic sewage processing system is 40,000 tons/day, and treatment process is common activated sludge process.Utilize Seaweed Extract to process this water body, throw in microorganism simultaneously, object reduces the COD of sewage water outlet.Seaweed Extract is selected from the mixture of sea-tangle and kelp, and quality group becomes sea-tangle: kelp=4:1.Adopt the mode that Seaweed Extract solution sprays in aeration tank, spray concentration is 50ppm, spray frequency be every 15 days once.The microorganism thrown in is the mixture of photosynthetic bacterium, nitrogen cycle bacteria and phosphate-solubilizing bacteria, and ratio is 5:1:1, adds 5 kilograms every day, is evenly sprinkling upon in aeration tank, throws in 7 days continuously.In other embodiments, microorganism interpolation concentration, add frequency can change along with the change of the kind of superior microorganism in pending water body, effluent quality requirement etc.Water outlet COD sampling is fetched water at second pond.

Through the process of former treatment system, wastewater influent COD is 260mg/L, water outlet COD41.0mg/L, and processing efficiency is 84.2%; After add Seaweed Extract in former treatment system, water outlet COD is 29.4mg/L, and processing efficiency brings up to 88.7%.

Embodiment four:

The water body of the present embodiment is the water body in industrial wastewater treatment system, is specially refinery oily(waste)water.The processing power of this industrial wastewater treatment system is 230m3/h, and treatment process is Induced-draft air float process.Due to oil-containing in waste water, air-float technology can be separated formation oil film oil and swims in the water surface and seal the water surface from water, causes treating pond smelly and grows a large amount of blue-green algae.Utilize bladder wrack extract to process this water body, object removes blue-green algae.In treating pond, throw in bladder wrack extract, throw in 5.75kg at every turn, input per hour once.After add bladder wrack extract in former treatment system, find originally to swim in the water surface by range estimation and the clc layer area sealing the water surface reduces gradually, the algae content of suspended solid total amount (TSS) is caused to be reduced to 124kg/ days by 206kg/ days, reduction amplitude is 40%, and the mud caused by blue-green algae at the bottom of pond is eliminated.

Above content is in conjunction with concrete embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made.

Claims

1. a water treatment method, is characterized in that: by Seaweed Extract and water mixing;

Wherein, described Seaweed Extract is the solid mixt extracted through physical treatment and chemical treatment by marine alga;

Described physical treatment comprises chopping, grinding, filtration, drying;

Described chemical treatment comprises extraction, neutralization, oxidation, absorption;

Described water body is sanitary sewage;

When processing sanitary sewage, also throw in microorganism to water body; Described marine alga is the mixture of sea-tangle and kelp, and the mass ratio of described sea-tangle and kelp is 4:1; Described microorganism is photosynthetic bacterium, nitrogen-cycle bacteria and phosphate-solubilizing bacteria, and ratio is 5:1:1, adds 5 kilograms every day, throws in 7 days continuously; Described Seaweed Extract adopts the mode of solution to spray in sanitary sewage, and spray concentration is 50ppm, spray frequency be every 15 days once.

2. water treatment method as claimed in claim 1, is characterized in that, also comprise: to water body aeration aerating.

3. water treatment method as claimed in claim 2, is characterized in that, also comprise: before described Seaweed Extract and water mixing, and Seaweed Extract is dissolved in the water and forms Seaweed Extract solution; The concentration of described Seaweed Extract solution is 5-200ppm.

4. water treatment method as claimed in claim 3, is characterized in that, the described at least one mode be selected to water body aeration aerating in nature drop water aeration oxygenation, mechanical aeration oxygenation, blast aeration oxygenation.

5. water treatment method as claimed in claim 4, it is characterized in that, described Seaweed Extract and water mixing mix stage by stage.