CN203461924U - Grain and oil production sewage treatment system - Google Patents

Abstract

The utility model provides a grain and oil production sewage treatment system which is good in treatment effect and through which effluent reaches the standard. The grain and oil production sewage treatment system comprises an oil separator for treating high-concentration water, and a coagulating basin a, a settling pond a, a neutralization pond, a settling pond b, a coagulating basin b, an air floatation machine, a regulating reservoir, a UASB (upflow anaerobic sludge blanket) reaction tank, a settling pond c, an anaerobic tank, an aerobic pool, an MBR pool, a BAF pool and a settling pond d which are sequentially connected with the oil separator; other wastewater pipelines are connected with the regulating reservoir; sludge outlets of the settling pond a, the settling pond b, the settling pond c and the settling pond d are respectively connected with a sludge pool. According to the grain and oil production sewage treatment system disclosed by the utility model, the plane arrangement floor space is small, a UASB has the high volume loading, and compared with a hydrolytic acidification and aeration process, the grain and oil production sewage treatment system saves multiple lands.

Description

Foodgrain and oilseed production Sewage treatment systems

Technical field

The utility model relates to a kind of Sewage treatment systems, especially a kind of Foodgrain and oilseed production Sewage treatment systems.

Background technology

The waste water discharging in Foodgrain and oilseed production process contains SS, CODcr, BOD ₅, NH ₃-N, animals and plants wet goods succession, waste water characteristic: organic concentration is high, BOD/COD ratio is higher, phosphate concn is high, grease concentration is high.Foodgrain and oilseed production waste water complicated component, pollution concentration is high, directly enters water body if not treated, will bring a series of harm to ecotope, therefore must be through processing.

The factory effluent of on-site is mainly from rinse water, grease washes before: Raw material processing; Job shop machine cleans and ground flushing water, also has in addition part employee domestic water.Existing Sewage treatment systems is bad for the treatment effect of above-mentioned Foodgrain and oilseed production sewage, and discharge can not be up to standard.

Utility model content

The purpose of this utility model is to provide the Foodgrain and oilseed production Sewage treatment systems that a kind for the treatment of effect is good, water outlet is up to standard.

Realize the Foodgrain and oilseed production Sewage treatment systems of the utility model object, comprise the oil trap of processing hc effluent, with described oil trap be connected successively coagulation basin a, settling tank a, neutralization tank, settling tank b, coagulation basin b, air floatation machine, equalizing tank, UASB reaction tank, settling tank c, anaerobic pond, Aerobic Pond, MBR pond, BAF pond and settling tank d; Other waste pipe connects equalizing tank, and the sludge outlet of described settling tank a, settling tank b, settling tank c and settling tank d is connected with sludge sump respectively.

Described MBR pond is connected with anaerobic pond by sludge return pipe.

The beneficial effect of Foodgrain and oilseed production Sewage treatment systems of the present utility model is as follows:

1, Foodgrain and oilseed production Sewage treatment systems of the present utility model, floor plan floor space is little: UASB has higher volumetric loading, and it,, than single A/O (acidication and aeration system) technique that adopts, saves a lot of soils;

2, processing high-concentration sewage effect is remarkable: the sludge concentration in UASB reaction tank is very high, can be up to more than 10000mg/L, and therefore, it can decompose the pollutent in sewage effectively, and most of organism is directly decomposed into natural pond G&W;

3, capacity of resisting impact load is strong: industrial production must cause the big ups and downs of sewage on water quality and quantity, and system adopts UASB technique after preliminary coagulating sedimentation, has debugged the anti-portative power of rear system more intense;

4, ammonia nitrogen processing power is strong: for high, the unmanageable feature of grain and oil ammonia nitrogen in waste water concentration, aerobic+MBR+BAF is set specially and processes workshop section, make water outlet ammonia nitrogen reach emission request;

5, maintenance cost is low, long service life: the inner no-rotary part of UASB reaction tank, do not need the filler changed yet, and only need to adopt anti-corrosion measure avoid etching problem, the work-ing life of UASB reaction tank can be very long;

6, the consumption of alkali is few, and running cost is lower: UASB reaction tank arranges outer circulation function, can mix with water inlet going out water cycle; Owing to containing corresponding basicity in water outlet, pre-acidifying pH water inlet on the low side can be neutralized to the biochemical reaction requirement that reaches suitable;

7, level of automation is high, operation less investment, convenient management.

Accompanying drawing explanation

Fig. 1 is the structural representation of Foodgrain and oilseed production Sewage treatment systems of the present utility model.

Embodiment

Embodiment of the present utility model is as follows: as shown in Figure 1, Foodgrain and oilseed production Sewage treatment systems of the present utility model, comprise the oil trap of processing hc effluent, with described oil trap be connected successively coagulation basin a, settling tank a, neutralization tank, settling tank b, coagulation basin b, air floatation machine, equalizing tank, UASB reaction tank, settling tank c, anaerobic pond, Aerobic Pond, MBR pond, BAF pond and settling tank d; Other waste pipe connects equalizing tank, and the sludge outlet of described settling tank a, settling tank b, settling tank c and settling tank d is connected with sludge sump respectively.

Described MBR pond is connected with anaerobic pond by sludge return pipe.

The principle of work of Foodgrain and oilseed production Sewage treatment systems of the present utility model is as follows:

1, the refining wastewater of high density is promoted to coagulation basin a from oil trap, at this feeding lime breast, pH value is transferred to more than 10, and the calcium ion in waste water and phosphate reaction generate precipitation of hydroxyapatite: 10Ca ²⁺+ 6PO ₄ ^3-+ 2OH ^-=Ca ₁₀(OH) ₂(PO4) ₆↓;

2, after settling tank a, waste water is from flowing to neutralization tank, and waste water pH value cannot reach emission request after promoting, and the too high subsequent technique that affects of while pH value, so will add dilute sulphuric acid that pH value is adjusted back to 6-9;

3, after settling tank b, at water collecting basin, add CaCl ₂carry out breakdown of emulsion, make oil in water emulsion and water stratification in waste water, by lift pump, waste water lifting is removed to suspended substance in waste water and the grease after breakdown of emulsion to air floatation machine, then enter equalizing tank;

4, the hc effluent of process dephosphorization mixes water quality with other factory effluents at equalizing tank and enters UASB reaction tank by lift pump;

5, comprehensive wastewater is promoted and is entered UASB reaction tank by equalizing tank lift pump.The reactive agent of UASB reaction tank is packless empty receptacle.In bottom, reaction zone, be formed by the good mud of sedimentation function (granule sludge or floc sludge) anaerobic mud bed.When waste water is entered after reactor by bottom, because a large amount of gases that upwards flow and produce of water rise, formed good natural stirring action, and made a part of mud form relatively thin suspended sludge bed above the Sludge Bed of reaction zone.UASB reaction tank can form also very good suspended sludge of granule sludge that sedimentation function is very good and suspended state, can allow larger upper Flow Velocity and higher volumetric loading; In UASB reaction tank, under the effect of microorganism, can remove most organic pollutant and a part of nitrogen.For follow-up aerobic treatment is created good condition and basis;

6, sewage enters settling tank c from the effluent weir overflow of UASB reaction tank.The effect of settling tank c is mainly the mud of the water outlet of UASB reaction tank is precipitated, and realizes mud-water separation, and supernatant liquor overflow is to anaerobic pond, and mud pumps in UASB reaction tank again;

7, sewage enters anaerobic pond from settling tank c, and anaerobic pond forms A/O circulation with MBR pond below.Under anaerobic environment, the pollutents such as the ammonia nitrogen in absorption and degrading waste water under the effect of the anaerobions such as nitrobacteria, phosphorus, waste water is removed most of the nitrogen phosphorus at this;

8, sewage enters Aerobic Pond from anaerobic pond water outlet, Aerobic Pond bottom adopts microporous diaphragm aerator, under the effect of aerobic bacteria, further remove the pollutent in water, finally by crossing, enter MBR pond, the filteration of MBR membrane module makes mud separated with waste water, and filter macromolecular organic pollutant, thereby realize qualified discharge;

9, the water outlet in MBR pond enters BAF pond, by the entozoic a large amount of heterotrophic bacterium of filtering layer and autotrophic bacteria (nitrifier), the ammonia nitrogen containing in waste water is absorbed to degraded, increases denitrification functions, finally reaches emission standard;

10, the mud of three settling tanks and air floatation machine import sludge sump by plate-and-frame filter press dehydration after outward transport process.

Embodiment recited above is described preferred implementation of the present utility model; not scope of the present utility model is limited; design under spiritual prerequisite not departing from the utility model; various distortion and improvement that the common engineering technical personnel in this area make technical solutions of the utility model, all should fall in the definite protection domain of claims of the present utility model.

Claims (2)

1. a Foodgrain and oilseed production Sewage treatment systems, it is characterized in that: comprise the oil trap of processing hc effluent, with described oil trap be connected successively coagulation basin a, settling tank a, neutralization tank, settling tank b, coagulation basin b, air floatation machine, equalizing tank, UASB reaction tank, settling tank c, anaerobic pond, Aerobic Pond, MBR pond, BAF pond and settling tank d; Other waste pipe connects equalizing tank, and the sludge outlet of described settling tank a, settling tank b, settling tank c and settling tank d is connected with sludge sump respectively.

2. Foodgrain and oilseed production Sewage treatment systems according to claim 1, is characterized in that: described MBR pond is connected with anaerobic pond by sludge return pipe.