CN103449687B - Method for processing domestic sewage through diatomite biological system - Google Patents
Method for processing domestic sewage through diatomite biological system Download PDFInfo
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- CN103449687B CN103449687B CN201310454611.9A CN201310454611A CN103449687B CN 103449687 B CN103449687 B CN 103449687B CN 201310454611 A CN201310454611 A CN 201310454611A CN 103449687 B CN103449687 B CN 103449687B
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Abstract
The invention relates to a method for processing domestic sewage through a diatomite biological system. The method for processing the domestic sewage through the diatomite biological system comprises the steps that primary treatment is conducted on the domestic sewage, the domestic sewage is led into an anoxic pool of a biological reaction pool after primary treatment, the domestic sewage enters an aerobiotic pool after being processed, and the domestic sewage is processed in the aerobiotic pool; inner back flow is conducted in the aerobiotic pool and in the anoxic pool, the sewage coming out of the aerobiotic pool passes through a feeding chamber and a water collection chamber, addition and mixture of diatomite are conducted on the sewage, the sewage enters an efficient diatomite reactor through a pressure pump, sludge-water separation is conducted on the sewage, clear water separated from the efficient diatomite reactor enters a contact pool, the clear water is sterilized and then discharged, part of the clear water flows back to an anoxic zone of the biological reaction pool and then enters an aerobiotic zone, the reflux ratio is 0-100%, remaining sludge passes through a sludge storage pool, sludge dewatering and filter pressing are conducted on the remaining sludge, and the sludge is conveyed out in a sludge cake mode. The method for processing the domestic sewage through the diatomite biological system is small in technological cost, good in quality of the discharged water, free of odors, capable of enabling the remaining sludge to be used repeatedly, and free of secondary pollution.
Description
Technical field
The invention belongs to sewage treatment area, be specifically related to a kind of method using diatomite biosystem process sanitary sewage.
Background technology
" 12 " period, country is proposing new requirement to the discharge of town sewage, emission standard is put on by GB18918-2002 one-level B and is risen to GB18918-2002 one-level A standard, and simultaneously Chinese Ministry of Environmental Protection's No. 157 disposal of file to mud there has also been new requirement, and rises to legal system and keep under strict control the stage.Therefore we must develop and a set ofly have the new technology, the novel process that economize on resources, dispose of sewage, solve current Problems existing in sewage disposal.
The method of disposing of sewage both at home and abroad at present mainly contains: chemical coagulation process, namely adopts grid-> sand setting-> flocculation-> to precipitate the simple process flow of-> water outlet.Advantage be investment little, take up an area less, save energy, equipment is simple, removal heavy metal, phosphorus, colourity are effective.But shortcoming is undesirable to the removal of organism and nitrogen.Be used alone when concentration is low uneconomical, being particularly added in the water-bed dope that formed and thoroughly can not being separated and taking away of various flocculation agent, finally still discharge causes more serious second time to pollute.Biological process, namely adopts oxidation ditch, A2/O, AB, ICEAS, and SBR technique is main flow.Advantage is that technique is comparatively ripe, and the organic pollutant in removal sewage and nutritive substance nitrogen, phosphorus etc. have certain effect.But shortcoming is that CODcr clearance is low, decolorizing effect is poor, investment is large, occupation of land is many, power consumption is high, equipment is complicated, management expectancy is strict.This technique also has a very large shortcoming in addition, and mud a large amount of is exactly difficult to dispose, and still easily produces secondary pollution.
Existing patented technology ZL200810022599.3, mainly solve the removal of phosphor in sewage and nitrogen, but these two kinds of methods all can not disposable whole recovery pollutent above, let alone the recycling of mud, in addition the critical defect of all kinds of technique, mud also can cause secondary pollution.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method using diatomite biosystem process sanitary sewage.The method process costs is few, and effluent quality is good, free from extraneous odour, and excess sludge can repeat recycling, can not cause secondary pollution.
The technical solution used in the present invention: a kind of method using diatomite biosystem process sanitary sewage, the method comprises the following steps: sewage is processed by the physical action of the coarse rack in coagulation stage, fine fack and rotational flow grit chamber, makes the suspended substance removals such as the grit in sewage; The anoxic pond that the sewage that coagulation is crossed passes into biological reaction tank again processes, then enters Aerobic Pond process; Within the Aerobic Pond of biological reaction tank, carry air by gas blower to Aerobic Pond, biological reaction tank biochemical oxygen demand (BOD) volumetric loading is 0.6-0.7(kg/m3d); Internal reflux is carried out in Aerobic Pond and anoxic pond inside, mixing is added by what carry out diatomite between blanking and between catchmenting from Aerobic Pond sewage out, the diatomite added is 30-50ppm, sewage per ton adds 0.03-0.05kg, enter in diatomite high efficiency reactor through force (forcing) pump again and carry out mud-water separation, the clear water separated from diatomite high efficiency reactor enter contact tank carry out disinfection after water outlet, be partly refluxed to the anoxic section of biological reaction tank, and then enter into aerobic section, its reflux ratio is 0-100%, is gravity flow backflow.Excess sludge is by storage basin and dewatering and filtering mud, with mud cake outward transport, recycling, when sludge condensation, add micro-flocculation agent, flocculant dosage is 0.2% of mud dry weight, do not need at dosing coagulant during sludge condensation, diatomite instead of traditional coagulating agent.This Process for Effluent water-quality guideline is better than GB18918-2002 one-level A standard, and not needing increases advanced treatment part.
The present invention compared with prior art has following beneficial effect:
1. diatomite treatment agent is at biological reaction tank internal adsorption organism, and flocculation together, forms flco, constantly condenses, and make mud more solidifying real, sludge quantity is compared traditional technology and reduced more than 50%;
2. the dosage of diatomite treatment agent is water 0.03-0.05kg per ton, and dosing method becomes before diatomite joins settling pond, and flocculation agent (polyacrylamide) is added to dewatered sludge part;
3. diatomite treatment agent is at biological reaction tank internal adsorption organism, and flocculation together, forms flco, owing to being enriched a large amount of organism in diatomite flco, become new bio-carrier, a kind of bio-carrier in sewage that moves about, make sewage disposal more efficiently, more thorough;
4. diatom has the function of self dehydration, and do not add flocculation agent during dehydration, sediment becomes pie to pack, recycling, and diatomite instead of traditional coagulating agent, and the dosage of flocculation agent greatly reduces, and can not form secondary pollution;
5. water outlet is limpid, without any peculiar smell, and sludge yield not enough original 1/3rd;
6. the present invention is on the basis of existing diatomite-A/0 domestic sewage treatment process, have employed the diatomite high efficiency reactor developed voluntarily, simplifies conventional sanitary sewage disposal flow process.
The inventive method is used separately with prior art the sewage processing identical water quality, and design parameter and Comparative result are as table 1.
Table 1
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Embodiment
As shown in Figure 1, a kind of method using diatomite biosystem process sanitary sewage, the method coagulation part mainly utilizes physical action to carry out simple process to water inlet.Comprise: inlet channel is used for regulating water inlet and measuring flooding quantity, coarse rack is with removing floating matter larger in water, fine fack is with removing floating matter less in water, and lift pump room is used for by sewage lifting to rotational flow grit chamber, the rotational flow grit chamber suspended substances etc. such as the grit removed in water; Second-stage treatment carries out overall treatment mainly through biology-physics synergy to sewage.Comprise: " anaerobic-aerobic " biochemistry pool removes the pollution substance in sewage by biological action and diatomite adsorption, for adding diatomite between blanking, pump well makes sewage mix with diatomite for the water yield before regulating pump simultaneously, mud-water separation is carried out in diatomite high efficiency reactor, make water outlet limpid, carry out the backflow of mud thing and excess sludge discharge by self-pressure simultaneously, contact tank carries out disinfection to water outlet, kill microorganism, storage basin and sludge dewatering machine room are used for storage and the press filtration of mud, make mud meet movement requirement of dispatching from the factory.
Sewage is entering in diatomite high efficiency reactor, after flocculation and sedimentation, at clarifying chamber's intermediate formation diatomite ultrafiltration layer.The material such as mud, heavy metal, most of microorganism in this ultrafiltration layer effectively catching sewage.
Claims (1)
1. one kind uses the method for diatomite biosystem process sanitary sewage, it is characterized in that the method comprises the following steps: sewage is processed by the physical action of the coarse rack in coagulation stage, fine fack and rotational flow grit chamber, makes the grit suspended substance removal in sewage, the anoxic pond that the sewage that coagulation is crossed passes into biological reaction tank again processes, then enters Aerobic Pond process, carry air by gas blower to Aerobic Pond at the Aerobic Pond of biological reaction tank, biological reaction tank biochemical oxygen demand (BOD) volumetric loading is 0.6-0.7(kg/m
3d), internal reflux is carried out in Aerobic Pond and anoxic pond inside, mixing is added by what carry out diatomite between blanking and between catchmenting from Aerobic Pond sewage out, the diatomite added is 30-50ppm, sewage per ton adds 0.03-0.05kg, enter in diatomite high efficiency reactor through force (forcing) pump again and carry out mud-water separation, the clear water separated from diatomite high efficiency reactor enter contact tank carry out disinfection after water outlet, be partly refluxed to the anoxic section of biological reaction tank, and then enter into aerobic section, its reflux ratio is 0-100%, for gravity flow backflow, excess sludge is by storage basin and dewatering and filtering mud, transport outward with mud cake, recycling, when sludge condensation, add micro-flocculation agent, flocculant dosage is 0.2% of mud dry weight, do not need at dosing coagulant during sludge condensation.
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| CN103936230B (en) * | 2014-04-29 | 2015-10-28 | 湖北殊威环保工程有限公司 | The sewage water treatment method that a kind of activated sludge process and biological contact oxidation process combine |
| CN104961294B (en) * | 2015-06-10 | 2017-01-25 | 山西科元晟地科技有限公司 | Apparatus for treating reverse osmosis strong brine by using purified diatomite bio-system, and method thereof |
| SG10201509295UA (en) * | 2015-11-11 | 2017-01-27 | Kytolink Tech Pte Ltd | Process and System for Treating Waste Water |
| CN105923895A (en) * | 2016-05-06 | 2016-09-07 | 秦皇岛钢天科技发展有限公司 | Hospital sewage treatment method |
| CN106746367A (en) * | 2017-02-17 | 2017-05-31 | 郭晓辉 | Using the equipment of diatomite treatment vinegar factory waste water |
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| KR100323203B1 (en) * | 1998-12-22 | 2003-03-15 | 인바이오텍 주식회사 | Floating Material Treatment System in Wastewater |
| CN1477066A (en) * | 2003-03-14 | 2004-02-25 | 曲靖珠源环保中心 | Method for treating high-concentration heavy metal waste water by using refined diatomite |
| CN101723537A (en) * | 2008-10-21 | 2010-06-09 | 姚日鹏 | Novel process for urban sewage reutilization and treatment |
| CN202808537U (en) * | 2012-08-23 | 2013-03-20 | 中冶华天工程技术有限公司 | Town sewage deep treatment system |
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