CN206645971U

CN206645971U - A/O SBBR oxidation pond artificial wetland treatments pig farm biogas slurry system

Info

Publication number: CN206645971U
Application number: CN201720197089.4U
Authority: CN
Inventors: 万金保; 付煜; 王建永; 刘峰
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2017-03-02
Filing date: 2017-03-02
Publication date: 2017-11-17
Anticipated expiration: 2027-03-02

Abstract

A kind of A/O SBBR oxidation pond artificial wetland treatments pig farm biogas slurry system, regulating reservoir, anoxic pond, Aerobic Pond, second pond are set gradually before sequencing batch biofilm reactor (SBBR), establishes oxidation pond and the three-stage constructed wetland being made up of water plants such as canna, reed, cattail, wild rice stems successively after SBBR reactors.The system treatment effect is stable, and capacity of resisting impact load is strong, simple to operate, and operating cost is low.The SBBR reactors method of operation and time parameter are water inlet 1h, are aerated 3.5h, anoxic 2h, are aerated 3.5h, precipitate 1h, draining 1h.Biogas slurry effluent index after group technology processing in pig farm meets《Livestock and poultry breeding industry pollutant emission standard》（GB 18596‑2001）It is required that.

Description

A/O-SBBR- oxidation pond-artificial wetland treatment pig farm biogas slurry system

Technical field

It the utility model is related to a kind of anoxic/aerobic（A/O）, sequencing batch biofilm reactor（SBBR）, oxidation pond and people Work wetland（CW）Combined treatment pig farm biogas slurry system, belongs to Environmental Science and Engineering technical field.

Background technology

In recent years, China's livestock and poultry breeding industry develops rapidly, forms scale, intensive development trend, produces simultaneously Substantial amounts of feces of livestock and poultry, its environmental problem formed also getting worse.National Pollutant source investigation publication is shown for the first time, livestock and poultry Aquaculture year discharges 1268.26 ten thousand tons of COD, 102.48 ten thousand tons of total nitrogen, 16.04 ten thousand tons of total phosphorus.In addition, according to measuring and calculating The yield of the year two thousand twenty whole nation feces of livestock and poultry is up to 42.22 × 10⁸t.Livestock and poultry breeding industry pollution turns into China rural area face source One of principal element of pollution, also turn into the third-largest pollution sources after industrial wastewater and sanitary sewage.National statistics shows Pig-breeding industry accounts for the 47% of the scale of livestock and poultry breeding industry, therefore management of the necessary increasing to pig industry waste water.Existing rank Section, the Large-scale pig farm waste water treatment in China have been basically completed Anaerobic Treatment, that is, have had Anaerobic Treatment structures, such as biogas Pond.By anaerobic fermentation so that the larger molecular organicses in piggery wastewater are changed into small molecular organic acid, organic concentration is Decline.But the still rich nutritive material such as the COD containing higher concentration and a large amount of ammonia, phosphorus in caused a large amount of biogas slurries after fermenting, such as Fruit is not handled further, and directly discharge will form serious destruction to the ecological environment on periphery.

At present, kinds of processes have developed to pig farm biogas slurry treatment both at home and abroad, such as Fe-C Micro Electrolysis Method, SBBR techniques, ultrafiltration （UF）Etc..But single treatment technique is not disposable up to standard, and have that treatment effect is unstable, and operational and administrative expenses height etc. is asked Topic, still lacks economical rationality, the such waste water of the PROCESS FOR TREATMENT of technology maturation at this stage.Therefore, find a kind of Nitrogen/Phosphorus Removal It is good, investment is low with operating cost, suit measures to local conditions, operational administrative it is simple, and the combination work of certain economy and environmental benefit can be produced Skill, the problem of environmental pollution to caused by solving large scale of pig farm waste water are particularly important.

The content of the invention

The purpose of this utility model is for pig farm biogas slurry has concentration of nitrogen and phosphorus height, content of organics is big and biodegradability is poor The features such as, it is proposed that a kind of anoxic/aerobic（A/O）- sequencing batch biofilm reactor（SBBR）- oxidation pond-artificial swamp （CW）Integrated treatment pig farm biogas slurry system, effluent index meets after system processing《Livestock and poultry breeding industry pollutant emission Standard》（GB 18596-2001）It is required that.

Realizing the technical solution of the utility model is:Utilize anoxic/aerobic（A/O）, sequencing batch biofilm reactor （SBBR）, oxidation pond, artificial swamp（CW）Quaternity integrated treatment pig farm biogas slurry,

The system forms:In sequencing batch biofilm reactor（SBBR）Regulating reservoir, anoxic pond, good is set gradually before Oxygen pond, second pond, establish oxidation pond successively after SBBR reactors and by water plants such as canna, reed, cattail, wild rice stems The three-stage constructed wetland of composition.

The second pond, sequencing batch biofilm reactor and sludge drying bed connect, and the sludge in two ponds is discharged into sludge and do Change bed, sludge drying bed is connected with anoxic pond, sludge upper liquid is back to anoxic pond, Aerobic Pond is connected with anoxic pond, makes dirt Water flow to anoxic pond.

The system work process is as follows：

（1）Pig farm biogas slurry is collected by pipe network, from inflow after the excrement slag and inorganic floating object of grid retention bulky grain Regulating reservoir, water quality and runoff investigation are carried out, reduce impact load；

(2）Biogas slurry enters anoxic pond by elevator pump after overregulating, anti-by hydrolysis acidification in the presence of heterotroph Should.Degradation of organic substances improves the biodegradability of waste water, and removes part in the presence of the absorption of biomembrane and gravitational settling and hang Floating particles thing；

（3）Anoxic pond water outlet gravity flow enters Aerobic Pond, and microorganism is largely degraded under aerobic condition by metabolism to be had Machine thing and most ammonia nitrogen is removed by nitrification, while controls the mixed liquor of Aerobic Pond to be partly refluxed to anoxic pond, Improve denitrification denitrogenation effect；

（4）Aerobic Pond water outlet enters second pond by elevator pump, and precipitation clarification is carried out to waste water, removes FEOL and is lost in Activated sludge and the biomembrane that comes off to maintain the normal operation of subsequent technique.The sludge part of second pond is back to anoxic pond With SBBR reactors, activated sludge concentration is improved；

（5）Secondary clarifier effluent utilizes the life being attached in reactor on filler by downflow weir overflow to SBBR reactors Thing film carries out biochemical degradation, the SBBR reactors method of operation and time parameter to pollutant as water inlet 1h, is aerated 3.5h, anoxic 2h, 3.5h is aerated, precipitates 1h, draining 1h, COD, nitrogen phosphorus are further being removed after nitrification/denitrification in aerobic/anoxic Deng pollutant；

（6）SBBR reactors water outlet gravity flow enters oxidation pond, using bacterium, algae cogeneration system and aquatile system to waste water Further purification；

（7）Oxidation pond water flows into artificial swamp by elevator pump, and artificial swamp is 3 grades of series connection;The first order is vertical current Artificial swamp, plant canna;The second level is surface current artificial wetland, plants reed and cattail;The third level is that drowned flow artificial is wet Ground, plantation wild rice stem, watermifoil;Waste water is multiple by soil, artificial dielectric, plant, the physics of microorganism, chemistry, biochemistry Synergy carries out advanced treating, final qualified discharge;

（8）The excess sludge of second pond and SBBR reactors is discharged into sludge drying bed, and the sludge after desiccation is carried out at outward transport Reason disposal.

The utility model has the advantage of:

By by the mixed-liquor return in O ponds to A ponds, enhancing the effect of denitrification denitrogenation and without additional carbon；Anti- nitre The basicity of the consumption of basicity and nitration reaction forms dynamic equilibrium caused by change process, without additional basicity, saves medicament Expense.The biodegradability of waste water is improved after A/O techniques, is advantageous to the normal operation of system subsequent biological treatment technique.

The SBBR reactor start-up cycles are short, and capacity of resisting impact load is strong, and excess sludge yield is few, equipment disposal ability Greatly.Biomembrane is fixed on filler surface, can inhabit the microorganism of generation time length, forms longer food chain, such as nitrobacteria, Therefore denitrification effect is good.Agitating device need not be set in reactor and do not need sludge reflux, energy consumption is small and management easy to maintain.Instead Answer device to realize Automatic Control, be easy to debug and manage, obtain optimal operating parameter.

Oxidation pond available depth 1.8m, is divided into aerobic zone, aerobic area and anaerobic zone, using micro- life in different water depth region Thing forms helotism system and carries out self-purification to waste water, and pool body simple structure is economical and practical, and operational management is convenient.

The water treatment effect of different flow pattern various plants in three-stage constructed wetland has been given full play to, the de- of depth can be carried out Nitrogen dephosphorization.In addition large-scale artificial swamp can improve the capacity of resisting impact load of system, while play the landscape beautified the environment Effect.

Chemical agent need not be added during waste water treatment process normal operation, secondary pollution will not be produced.Wastewater treatment work Skill operating cost is low, operational administrative is simple, is easy to the daily management on pig farm and is adapted to large-scale pig farm wastewater treatment and technology to push away Extensively.

After group technology is handled, final outflow water water quality is better than biogas slurry《Livestock and poultry breeding industry pollutant emission standard》（GB 18596-2001）It is required that.

Brief description of the drawings

Fig. 1 is A/O-SBBR- oxidation pond-artificial wetland treatment pig farm biogas slurry system schematic.

Embodiment

System described in the utility model forms:In sequencing batch biofilm reactor（SBBR）Regulation is set gradually before Pond, anoxic pond, Aerobic Pond, second pond, establish oxidation pond successively after SBBR reactors and by canna, reed, cattail, hay The white three-stage constructed wetland for waiting water plant to form.

Treating capacity is 400m³/ d pig farm biogas slurry, biogas slurry water quality：CODCr 1200~1500mg/L, NH₃- N 500~ 450~800mg/L of 630mg/L, TP 20~30mg/L, SS.Pig farm biogas slurry enters regulating reservoir after grid, carry out water quality and Runoff investigation.Then waste water enters the anoxic section of A/O techniques, is acted on, degradation of organic substances, improved using the hydrolysis acidification of heterotroph The biodegradability of waste water.The water outlet of anoxic section flows into aerobic section, is largely degraded by the metabolism of microorganism under aerobic condition Organic matter and most ammonia nitrogen is removed by nitrification.The mixed liquor of Aerobic Pond is controlled to be partly refluxed to anoxic simultaneously Pond, improve denitrification denitrogenation effect.Aerobic Pond water outlet CODCr 900~1000mg/L, NH₃- N 390~420mg/L, TP 18 380~400mg/L of~22mg/L, SS.Aerobic Pond water outlet enters second pond by elevator pump, carries out waterpower clarification to waste water, goes The activated sludge being lost in except FEOL and the biomembrane that comes off are to maintain the normal operation of subsequent technique.Secondary clarifier effluent flows into SBBR reaction tanks, biochemical degradation is carried out to pollutant using the biomembrane being attached in reactor on filler.The SBBR methods of operation And time parameter is water inlet 1h, is aerated 3.5h, anoxic 2h, is aerated 3.5h, precipitates 1h, draining 1h.Passing through aerobic/anoxic ammonium oxidation The pollutants such as COD, nitrogen phosphorus are further removed after denitrification.SBBR water outlet CODCr 250~280mg/L, NH₃- N 220~ 230~250mg/L of 250mg/L, TP 4~6mg/L, SS.SBBR water outlets flow into oxidation pond and by canna, reed, perfume (or spice) successively The three-stage constructed wetland that the water plants such as Pu, wild rice stem are formed.Waste water by soil, artificial dielectric, plant, microorganism physics, Multiple act synergistically of chemistry, biochemistry carries out advanced treating to waste water, final outflow water water-quality COD 180~210mg/L of Cr, NH₃70~90mg/L of-N 30~40mg/L, TP 2~3mg/L, SS.

Claims

A kind of 1. A/O-SBBR- oxidation pond-artificial wetland treatment pig farm biogas slurry system, it is characterised in that:The system forms: Regulating reservoir, anoxic pond, Aerobic Pond, second pond are set gradually before sequencing batch biofilm reactor is SBBR, is reacted in SBBR Oxidation pond and the three-stage constructed wetland being made up of canna, reed, cattail, wild rice stem water plant are established successively after device；It is described Second pond, sequencing batch biofilm reactor and sludge drying bed connect, and the sludge in two ponds is discharged into sludge drying bed, sludge drying Bed is connected with anoxic pond, sludge upper liquid is back to anoxic pond, Aerobic Pond is connected with anoxic pond, sewage is flow to anoxic pond.