CN103755107A - Urban recycled water deep-treatment method - Google Patents

Urban recycled water deep-treatment method Download PDF

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CN103755107A
CN103755107A CN201410057403.XA CN201410057403A CN103755107A CN 103755107 A CN103755107 A CN 103755107A CN 201410057403 A CN201410057403 A CN 201410057403A CN 103755107 A CN103755107 A CN 103755107A
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CN103755107B (en
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刘冬峰
张丽萍
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Abstract

The invention discloses an urban recycled water deep-treatment method. The COD (chemical oxygen demand) value of the recycled water is 65-95 mg/L. The method is characterized by comprising a coal ash adsorbent treatment step, a biological deodorant treatment step, a biological purifier treatment step and a modified zeolite adsorption treatment step which are carried out in sequence. According to the method, a coal ash adsorbent can be used for adsorbing large-grained organic matters in the water, a biological deodorant can be used for removing the peculiar smell from the water, a biological purifier can be used for consuming residual organic matters in the water, and modified zeolite can be used for efficiently removing calcium magnesium ions, fluorine ions and other heavy metal ions from the wastewater.

Description

A kind of deep treatment method of municipal middle water
Technical field
The invention belongs to municipal sewage treatment field of Environment Protection, relate in particular to a kind of deep treatment method of municipal middle water.
Background technology
Middle water, also claims reuse water, refers to that sewage, after suitably processing, reaches certain water-quality guideline, meets certain service requirements, can carry out the water of useful use, and a large amount of middle water is as landscape water.Municipal middle water (hereinafter to be referred as middle water) is as the second water source in city, has that the water yield is large, a water conditioning, from the horse's mouth and do not need the features such as long distance water diversion, is a kind of regenerated water source of Sustainable development from now on.Middle water reuse can effectively solve water resources deficiency, improves water resources repeating utilization factor and reduce sewage discharge, has huge social benefit and good economic benefit.Although the Pollutant levels in middle water reach discharging standards, water quality is also better than industrial sewage, has some indexs still poor, can not meet the requirement of industrial production to water quality, as COD, suspended substance and microorganism etc.Therefore, municipal middle water could reuse after must suitably processing.
If municipal middle water is processed bad, can cause body eutrophication, water ecological environment constantly to worsen, on sense organ, show as that algae in water increases by geometric progression, transparency and dissolved oxygen decline, water quality deterioration in water, present different colours, animals and plants and human health in harm water, make Ecology and water function be hindered and destroy, it is stench that water taste becomes, and water clarity declines, water body is muddy, makes the aesthetic values such as landscape water body forfeiture is viewed and admired, amusement.Therefore, improving the advanced treatment dynamics of municipal middle water, can guarantee the not infringement of human body, animal body, water body while making it for landscape water, is a large technical study focus in this area.
Summary of the invention
In order to overcome deficiency of the prior art, the object of this invention is to provide a kind of deep treatment method of municipal middle water, municipal middle water is carried out to advanced treatment, contaminant removal efficiency is high, stable effluent quality, pollutent is removed substantially, can meet landscape water and put into requirement.
Technical scheme of the present invention is as follows.
A deep treatment method for municipal middle water, the COD value of described middle water is between 65-95mg/L, and described method comprises that the fly ash absorbent carrying out is in turn processed, biological deodorant is processed, biological cleanser is processed, modified zeolite adsorption treatment; Be specially:
(1) fly ash absorbent is processed: middle water is introduced in flyash treating pond, and Xiang Chizhong drops into fly ash absorbent centering water and carries out pre-treatment, and fly ash absorbent adds weight and middle water weight ratio example between 0.8-2.8:100, and the treatment time is 3-36h; Described fly ash absorbent is prepared by the following method: (A), according to parts by weight: unslaked lime 10-15 part, polynite 5-9 part, vermiculite 1-5 part, clay 2-20 part, methylcellulose gum 2-6 part, Sodium Bromide 1-2 part, aluminum oxide 5-10 part, flyash 100-240 part, each raw material is mixed, adding water, to make diameter be 35-45mm spheroidal particle, then at tunnel furnace sintering 2-3h at 950-980 ℃, obtains fly ash absorbent precursor after cooling; (B) aqueous sodium bromide that, preparation volumetric molar concentration is 1-1.5mol/L, the fly ash absorbent precursor that step (A) is obtained is poured into and in described aqueous sodium bromide, is carried out dip treating 16-24h, (C), by putting into after vacuum drying oven drying treatment 10-20h through the fly ash absorbent precursor of step (B) dip treating, obtain fly ash absorbent;
(2) biological deodorant is processed: the middle water that fly ash absorbent is processed is introduced in biological deodorization tank, and Xiang Chizhong adds biological deodorant, and biological deodorant adds weight and middle water weight ratio example between 0.1-0.8:100, and the treatment time is 3-5 days; The microbial strains of described biological deodorant consists of: Lactobacterium acidophilum 10 6-10 9individual/mL, bacillus pumilus 10 6-10 9individual/mL, subtilis 10 6-10 9individual/mL, Pseudomonas fluorescens 10 5-10 7individual/mL, Rhodopseudomonas palustris 10 5-10 7individual/mL, the figure of class British mold 10 4-10 6individual/mL, candida inconspicua bacterium 10 4-10 6individual/mL, expansion mould 10 4-10 6individual/mL, Rhizopus oryzae 10 4-10 6individual/mL, viride 10 4-10 6individual/mL, streptomyces microflavus 10 4-10 6individual/mL and streptomyces griseus 10 4-10 6individual/mL;
(3) biological cleanser is processed: the middle water that biological deodorant is processed is introduced in biological purifying tank, Xiang Chizhong adds biological cleanser, biological cleanser adds weight and middle water weight ratio example between 0.8-6.8:100, treatment time is 5-9 days, and it is 3-4mg/L that adjustment aeration condition makes the amount of the dissolved oxygen in middle water; Bacterial classification in described biological cleanser comprises Rhodopseudomonas rutila, Jingyang streptomycete, and streptococcus acidi lactici, and the substratum of described bacterial classification is comprised of the component of following mass ratio: brown sugar 5-6%, yeast powder 1-2%, surplus is water;
(4) modified zeolite adsorption treatment: the middle water that biological cleanser is processed is used lift pump to be delivered to be positioned at the adsorption tower water-in of adsorption tower bottom after filtering, adsorption tower is filled with nonwoven layer, quartz sand layer and modified zeolite layer from the bottom up successively, wherein, the thickness of nonwoven layer is between 2-20mm, the thickness ratio of quartz sand layer and modified zeolite layer is 1:0.5-0.8, water flows out from being positioned at the adsorption tower water outlet at adsorption tower top, through pump delivery, to aqua storage tank, be advanced treatment product water.
In the art, the method for modified zeolite has two types: a class is the modification to zeolite framework element, and another kind of is modification to non-skeleton elements.The modification of backbone element is comprised to acid-alkali treatment modification etc., the modification of non-skeleton elements is comprised to coordination chemistry in ion-exchanged, zeolite, surfactant-modified etc.In the present invention, modified zeolite is the zeolite that method of modifying modification conventional in this area obtains, for example, in prior art, use the zeolite of sodium chloride solution modification, can be also the zeolite of specific method of modifying modification.Typically, the zeolite that conventional method of modifying modification obtains is slightly weaker than the zeolite of specific method of modifying modification on adsorption effect, but still can reach technique effect of the present invention.
Preferably, described modified zeolite is modified mordenite, modification procedure is: mordenite, kaolin, silicon magnesium glue, sesbania powder and phosphoric acid are mixed according to part by weight 60:30:30:20:20, then add water and be prepared into the slurries that solid content is 50-55%; Slurries are spray dried to powdery particle, then by powdered granule in retort furnace in 500-700 ℃ of roasting 3-5h, be then cooled to room temperature, obtain modified zeolite, wherein the volumetric molar concentration of phosphoric acid is 0.9-1.3mol/L, is preferably 1.0mol/L.
Described mordenite is commercially available mordenite, or the available mordenite of those skilled in the art, the present invention finds, mordenite is due to its specific structure, aspect absorption metal ions in sewage, there is good effect, after the adsorption treatment of modified mordenite, water pollutant further reduces.
In the present invention, by municipal middle water is carried out to advanced treatment, and through fly ash absorbent processing, biological deodorant processing, biological cleanser processing, modified zeolite adsorption treatment, stable effluent quality, reach the requirement of landscape water, the macrobead organic substance of fly ash absorbent in can planar water, biological deodorant can eliminate in peculiar smell in water, remaining organism during biological cleanser can consume in water, modified zeolite can be removed calcium ions and magnesium ions in sewage, fluorion and other heavy metal ion efficiently.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is further elaborated.
Embodiment 1
A deep treatment method for municipal middle water, the COD value of described middle water is 95mg/L, described method comprises that the fly ash absorbent carrying out is in turn processed, biological deodorant is processed, biological cleanser is processed, modified zeolite adsorption treatment; Be specially:
(1) fly ash absorbent is processed: middle water is introduced in flyash treating pond, and Xiang Chizhong drops into fly ash absorbent centering water and carries out pre-treatment, and fly ash absorbent adds weight and middle water weight ratio example between 2.8:100, and the treatment time is 36h; Described fly ash absorbent is prepared by the following method: (A), according to parts by weight: 15 parts of unslaked limes, 9 parts of polynites, 5 parts of vermiculites, 20 parts of clays, 6 parts of methylcellulose gum, 2 parts of Sodium Bromides, 10 parts, aluminum oxide, 240 parts, flyash, each raw material is mixed, adding water, to make diameter be 45mm spheroidal particle, then at tunnel furnace sintering 3h at 980 ℃, obtains fly ash absorbent precursor after cooling; (B) aqueous sodium bromide that, preparation volumetric molar concentration is 1.5mol/L, the fly ash absorbent precursor that step (A) is obtained is poured into and in described aqueous sodium bromide, is carried out dip treating 24h, (C), by putting into after vacuum drying oven drying treatment 20h through the fly ash absorbent precursor of step (B) dip treating, obtain fly ash absorbent;
(2) biological deodorant is processed: the middle water that fly ash absorbent is processed is introduced in biological deodorization tank, and Xiang Chizhong adds biological deodorant, and biological deodorant adds weight and middle water weight ratio example between 0.8:100, and the treatment time is 5 days; The microbial strains of described biological deodorant consists of: Lactobacterium acidophilum 10 6-10 9individual/mL, bacillus pumilus 10 6-10 9individual/mL, subtilis 10 6-10 9individual/mL, Pseudomonas fluorescens 10 5-10 7individual/mL, Rhodopseudomonas palustris 10 5-10 7individual/mL, the figure of class British mold 10 4-10 6individual/mL, candida inconspicua bacterium 10 4-10 6individual/mL, expansion mould 10 4-10 6individual/mL, Rhizopus oryzae 10 4-10 6individual/mL, viride 10 4-10 6individual/mL, streptomyces microflavus 10 4-10 6individual/mL and streptomyces griseus 10 4-10 6individual/mL;
(3) biological cleanser is processed: the middle water that biological deodorant is processed is introduced in biological purifying tank, Xiang Chizhong adds biological cleanser, biological cleanser adds weight and middle water weight ratio example between 6.8:100, treatment time is 9 days, and it is 4mg/L that adjustment aeration condition makes the amount of the dissolved oxygen in middle water; Bacterial classification in described biological cleanser comprises Rhodopseudomonas rutila, Jingyang streptomycete, and streptococcus acidi lactici, and the substratum of described bacterial classification is comprised of the component of following mass ratio: brown sugar 5-6%, yeast powder 1-2%, surplus is water;
(4) modified zeolite adsorption treatment: the middle water that biological cleanser is processed is used lift pump to be delivered to be positioned at the adsorption tower water-in of adsorption tower bottom after filtering, adsorption tower is filled with nonwoven layer, quartz sand layer and modified zeolite layer from the bottom up successively, wherein, the thickness of nonwoven layer is 20mm, the thickness ratio of quartz sand layer and modified zeolite layer is 1:0.8, water flows out from being positioned at the adsorption tower water outlet at adsorption tower top, through pump delivery, to aqua storage tank, is advanced treatment product water.
Modified zeolite in the present embodiment is sodium-chlor modified zeolite, its preparation method packs in the synthetic glass post that is 14mm at internal diameter the zeolite that particle diameter is 0.5~1.0mm into, properties-correcting agent NaCl solution with the flow velocity of 0.5m/h by zeolite layer to till ion-exchange completely.
Embodiment 2
A deep treatment method for municipal middle water, the COD value of described middle water is 65m g/ L, described method comprises that the fly ash absorbent carrying out is in turn processed, biological deodorant is processed, biological cleanser is processed, modified zeolite adsorption treatment; Be specially:
(1) fly ash absorbent is processed: middle water is introduced in flyash treating pond, and Xiang Chizhong drops into fly ash absorbent centering water and carries out pre-treatment, and fly ash absorbent adds weight and middle water weight ratio example between 0.8:100, and the treatment time is 3h; Described fly ash absorbent is prepared by the following method: (A), according to parts by weight: 10 parts of unslaked limes, 5 parts of polynites, 1 part of vermiculite, 2 parts of clays, 2 parts of methylcellulose gum, 1 part of Sodium Bromide, 5 parts, aluminum oxide, 100 parts, flyash, each raw material is mixed, adding water, to make diameter be 35mm spheroidal particle, then at tunnel furnace sintering 2h at 950 ℃, obtains fly ash absorbent precursor after cooling; (B) aqueous sodium bromide that, preparation volumetric molar concentration is 1mol/L, the fly ash absorbent precursor that step (A) is obtained is poured into and in described aqueous sodium bromide, is carried out dip treating 16h, (C), by putting into after vacuum drying oven drying treatment 10h through the fly ash absorbent precursor of step (B) dip treating, obtain fly ash absorbent;
(2) biological deodorant is processed: the middle water that fly ash absorbent is processed is introduced in biological deodorization tank, and Xiang Chizhong adds biological deodorant, and biological deodorant adds weight and middle water weight ratio example between 0.1:100, and the treatment time is 3 days; The microbial strains of described biological deodorant consists of: Lactobacterium acidophilum 10 6-10 9individual/mL, bacillus pumilus 10 6-10 9individual/mL, subtilis 10 6-10 9individual/mL, Pseudomonas fluorescens 10 5-10 7individual/mL, Rhodopseudomonas palustris 10 5-10 7individual/mL, the figure of class British mold 10 4-10 6individual/mL, candida inconspicua bacterium 10 4-10 6individual/mL, expansion mould 10 4-10 6individual/mL, Rhizopus oryzae 10 4-10 6individual/mL, viride 10 4-10 6individual/mL, streptomyces microflavus 10 4-10 6individual/mL and streptomyces griseus 10 4-10 6individual/mL;
(3) biological cleanser is processed: the middle water that biological deodorant is processed is introduced in biological purifying tank, Xiang Chizhong adds biological cleanser, biological cleanser adds weight and middle water weight ratio example between 0.8:100, treatment time is 5 days, and it is 3mg/L that adjustment aeration condition makes the amount of the dissolved oxygen in middle water; Bacterial classification in described biological cleanser comprises Rhodopseudomonas rutila, Jingyang streptomycete, and streptococcus acidi lactici, and the substratum of described bacterial classification is comprised of the component of following mass ratio: brown sugar 5-6%, yeast powder 1-2%, surplus is water;
(4) modified zeolite adsorption treatment: the middle water that biological cleanser is processed is used lift pump to be delivered to be positioned at the adsorption tower water-in of adsorption tower bottom after filtering, adsorption tower is filled with nonwoven layer, quartz sand layer and modified zeolite layer from the bottom up successively, wherein, the thickness of nonwoven layer is 2mm, the thickness ratio of quartz sand layer and modified zeolite layer is 1:0.5, water flows out from being positioned at the adsorption tower water outlet at adsorption tower top, through pump delivery, to aqua storage tank, is advanced treatment product water; Described modified zeolite is modified mordenite, and modification procedure is: mordenite, kaolin, silicon magnesium glue, sesbania powder and phosphoric acid are mixed according to part by weight 60:30:30:20:20, then add water and be prepared into the slurries that solid content is 50-55%; Slurries are spray dried to powdery particle, then by powdered granule in retort furnace in 500-700 ℃ of roasting 3-5h, be then cooled to room temperature, obtain modified zeolite, wherein the volumetric molar concentration of phosphoric acid is 1.3mol/L.
Embodiment 3
A deep treatment method for municipal middle water, the COD value of described middle water is 70mg/L, described method comprises that the fly ash absorbent carrying out is in turn processed, biological deodorant is processed, biological cleanser is processed, modified zeolite adsorption treatment; Be specially:
(1) fly ash absorbent is processed: middle water is introduced in flyash treating pond, and Xiang Chizhong drops into fly ash absorbent centering water and carries out pre-treatment, and fly ash absorbent adds weight and middle water weight ratio example between 0.8:100, and the treatment time is 3h; Described fly ash absorbent is prepared by the following method: (A), according to parts by weight: 10 parts of unslaked limes, 5 parts of polynites, 1 part of vermiculite, 2 parts of clays, 2 parts of methylcellulose gum, 1 part of Sodium Bromide, 5 parts, aluminum oxide, 100 parts, flyash, each raw material is mixed, adding water, to make diameter be 35mm spheroidal particle, then at tunnel furnace sintering 2h at 950 ℃, obtains fly ash absorbent precursor after cooling; (B) aqueous sodium bromide that, preparation volumetric molar concentration is 1mol/L, the fly ash absorbent precursor that step (A) is obtained is poured into and in described aqueous sodium bromide, is carried out dip treating 16h, (C), by putting into after vacuum drying oven drying treatment 10h through the fly ash absorbent precursor of step (B) dip treating, obtain fly ash absorbent;
(2) biological deodorant is processed: the middle water that fly ash absorbent is processed is introduced in biological deodorization tank, and Xiang Chizhong adds biological deodorant, and biological deodorant adds weight and middle water weight ratio example at 0.1:100, and the treatment time is 3 days; The microbial strains of described biological deodorant consists of: Lactobacterium acidophilum 10 8-10 9individual/mL, bacillus pumilus 10 8-10 9individual/mL, subtilis 10 6-10 7individual/mL, Pseudomonas fluorescens 10 6-10 7individual/mL, Rhodopseudomonas palustris 10 6-10 7individual/mL, the figure of class British mold 10 5-10 6individual/mL, candida inconspicua bacterium 10 5-10 6individual/mL, expansion mould 10 5-10 6individual/mL, Rhizopus oryzae 10 5-10 6individual/mL, viride 10 5-10 6individual/mL, streptomyces microflavus 10 5-10 6individual/mL and streptomyces griseus 10 5-10 6individual/mL;
(3) biological cleanser is processed: the middle water that biological deodorant is processed is introduced in biological purifying tank, Xiang Chizhong adds biological cleanser, biological cleanser adds weight and middle water weight ratio example at 0.8:100, treatment time is 5 days, and it is 3mg/L that adjustment aeration condition makes the amount of the dissolved oxygen in middle water; Bacterial classification in described biological cleanser comprises Rhodopseudomonas rutila, Jingyang streptomycete, and streptococcus acidi lactici, and the substratum of described bacterial classification is comprised of the component of following mass ratio: brown sugar 5%, yeast powder 2%, surplus is water;
(4) modified zeolite adsorption treatment: the middle water that biological cleanser is processed is used lift pump to be delivered to be positioned at the adsorption tower water-in of adsorption tower bottom after filtering, adsorption tower is filled with nonwoven layer, quartz sand layer and modified zeolite layer from the bottom up successively, wherein, the thickness of nonwoven layer is 20mm, the thickness ratio of quartz sand layer and modified zeolite layer is 1:0.8, water flows out from being positioned at the adsorption tower water outlet at adsorption tower top, through pump delivery, to aqua storage tank, is advanced treatment product water; Described modified zeolite is modified mordenite, and modification procedure is: mordenite, kaolin, silicon magnesium glue, sesbania powder and phosphoric acid are mixed according to part by weight 60:30:30:20:20, and then adding water, to be prepared into solid content be 55% slurries; Slurries are spray dried to powdery particle, then by powdered granule in retort furnace in 500 ℃ of roasting 3h, be then cooled to room temperature, obtain modified zeolite, wherein the volumetric molar concentration of phosphoric acid is 0.9mol/L.
Product water water quality for test implementation example 1,2,3, the product water that contriver obtains embodiment 1,2,3 detects according to < < urban wastewater treatment firm pollutant emission standard GB18918-2002 > >, detected result is as shown in table 1, can find out, water quality is all better than country-level A standard, can be used in landscape water.
Table 1 is the result of embodiment 1,2.
Figure BDA0000467740610000091
Although above-described embodiment has been made detailed description to the present invention; but it is only the present invention's part embodiment; rather than whole embodiment, people can also obtain other embodiment according to the present embodiment under without creative prerequisite, and these embodiment belong to protection scope of the present invention.

Claims (1)

1. the deep treatment method of a municipal middle water, the COD value of described middle water is between 65-95mg/L, it is characterized in that, described method comprises that the fly ash absorbent carrying out is in turn processed, biological deodorant is processed, biological cleanser is processed, modified zeolite adsorption treatment; Be specially:
(1) fly ash absorbent is processed: middle water is introduced in flyash treating pond, and Xiang Chizhong drops into fly ash absorbent centering water and carries out pre-treatment, and fly ash absorbent adds weight and middle water weight ratio example between 0.8-2.8:100, and the treatment time is 3-36h; Described fly ash absorbent is prepared by the following method: (A), according to parts by weight: unslaked lime 10-15 part, polynite 5-9 part, vermiculite 1-5 part, clay 2-20 part, methylcellulose gum 2-6 part, Sodium Bromide 1-2 part, aluminum oxide 5-10 part, flyash 100-240 part, each raw material is mixed, adding water, to make diameter be 35-45mm spheroidal particle, then at tunnel furnace sintering 2-3h at 950-980 ℃, obtains fly ash absorbent precursor after cooling; (B) aqueous sodium bromide that, preparation volumetric molar concentration is 1-1.5mol/L, the fly ash absorbent precursor that step (A) is obtained is poured into and in described aqueous sodium bromide, is carried out dip treating 16-24h, (C), by putting into after vacuum drying oven drying treatment 10-20h through the fly ash absorbent precursor of step (B) dip treating, obtain fly ash absorbent.
(2) biological deodorant is processed: the middle water that fly ash absorbent is processed is introduced in biological deodorization tank, and Xiang Chizhong adds biological deodorant, and biological deodorant adds weight and middle water weight ratio example between 0.1-0.8:100, and the treatment time is 3-5 days; The microbial strains of described biological deodorant consists of: Lactobacterium acidophilum 10 6-10 9individual/mL, bacillus pumilus 10 6-10 9individual/mL, subtilis 10 6-10 9individual/mL, Pseudomonas fluorescens 10 5-10 7individual/mL, Rhodopseudomonas palustris 10 5-10 7individual/mL, the figure of class British mold 10 4-10 6individual/mL, candida inconspicua bacterium 10 4-10 6individual/mL, expansion mould 10 4-10 6individual/mL, Rhizopus oryzae 10 4-10 6individual/mL, viride 10 4-10 6individual/mL, streptomyces microflavus 10 4-10 6individual/mL and streptomyces griseus 10 4-10 6individual/mL.
(3) biological cleanser is processed: the middle water that biological deodorant is processed is introduced in biological purifying tank, Xiang Chizhong adds biological cleanser, biological cleanser adds weight and middle water weight ratio example between 0.8-6.8:100, treatment time is 5-9 days, and it is 3-4mg/L that adjustment aeration condition makes the amount of the dissolved oxygen in middle water; Bacterial classification in described biological cleanser comprises Rhodopseudomonas rutila, Jingyang streptomycete, and streptococcus acidi lactici, and the substratum of described bacterial classification is comprised of the component of following mass ratio: brown sugar 5-6%, yeast powder 1-2%, surplus is water.
(4) modified zeolite adsorption treatment: the middle water that biological cleanser is processed is used lift pump to be delivered to be positioned at the adsorption tower water-in of adsorption tower bottom after filtering, adsorption tower is filled with nonwoven layer, quartz sand layer and modified zeolite layer from the bottom up successively, wherein, the thickness of nonwoven layer is between 2-20mm, the thickness ratio of quartz sand layer and modified zeolite layer is 1:0.5-0.8, water flows out from being positioned at the adsorption tower water outlet at adsorption tower top, through pump delivery, to aqua storage tank, be advanced treatment product water.
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