CN211141817U

CN211141817U - Sludge storage yard leachate treatment system

Info

Publication number: CN211141817U
Application number: CN201921829766.5U
Authority: CN
Inventors: 孙凯; 赵威; 刘猛; 刘明浩; 卓未龙; 王志宏; 王宇峰
Original assignee: Hangzhou Lijin Environmental Protection Building Materials Co ltd; Zhejiang Zone King Environmental Sci&tech Co ltd
Current assignee: Hangzhou Lijin Environmental Protection Building Materials Co ltd; Zhejiang Zone King Environmental Sci&tech Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-07-31
Anticipated expiration: 2029-10-29

Abstract

The utility model relates to the technical field of wastewater treatment. The purpose is to provide a sludge yard leachate treatment system, and the system should have that the treatment effect is good, running cost is low characteristics to solve the sludge yard's sludge leachate and be difficult to handle and lead to environmental pollution's problem. The technical scheme is as follows: the utility model provides a sludge storage yard filtration liquid processing system which characterized in that: the device comprises a water collecting tank, a Fe 0-anaerobic reactor, a biological selector, an MBBR bioreactor, a solid-liquid separator and a clean water tank which are sequentially communicated through pipelines.

Description

Sludge storage yard leachate treatment system

Technical Field

The utility model relates to a waste water treatment technical field especially relates to a sludge yard filtration liquid processing system.

Background

The sludge can generate a high-concentration liquid with organic or inorganic components under the biochemical degradation effects of compaction, fermentation and the like in the stacking process and the seepage effect of precipitation and underground water, the liquid is called sludge leachate which has high pollution, and if the treatment is improper, the leachate can cause serious secondary pollution to the environment. The existing sludge leachate treatment device has the defects of high operating cost and poor treatment effect, is relatively poor in practicability and needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming not enough among the above-mentioned background art, providing a sludge yard filtration liquid processing system, this system should have that the treatment effect is good, running cost is low characteristics to the sludge filtration liquid of solving the sludge yard is difficult to handle and leads to environmental pollution's problem.

The technical scheme of the utility model is that:

the utility model provides a sludge storage yard filtration liquid processing system which characterized in that: the device comprises a water collecting tank, a Fe-anaerobic device, a biological selector, an MBBR bioreactor, a solid-liquid separator and a clean water tank which are sequentially communicated through pipelines.

A lifting pump is arranged on a pipeline between the water collecting tank and the Fe-anaerobic device.

The device also comprises a plate-and-frame filter press; the discharge port of the solid-liquid separator is communicated with the inlet of the plate-and-frame filter press through a pipeline, and the filtrate outlet of the plate-and-frame filter press is communicated with a clean water tank through a pipeline.

The device also comprises a fan; and the air outlet of the fan is simultaneously communicated with the air inlets of the biological selector and the MBBR bioreactor through air pipes.

The utility model has the advantages that:

the utility model provides a current sludge filtration liquid treatment cost high, the poor difficult problem of treatment effect, through the mode that adopts the catch basin to collect, biochemical treatment, the whole reuses of back sewage are handled in workshop, factory greening watering and wet dedusting production, and not the external row has avoided causing secondary pollution to the environment.

Drawings

Fig. 1 is a schematic diagram of the system connection relationship of the present invention.

Detailed Description

The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following embodiments.

As shown in fig. 1, a sludge yard leachate treatment system comprises a water collecting tank 1, a Fe-anaerobic reactor 2, a biological selector 3, an MBBR bioreactor 5, a solid-liquid separator 6, a clean water tank 7, a plate-and-frame filter press 8 and a fan 4.

The water collecting tank, the Fe-anaerobic device, the biological selector, the MBBR bioreactor, the solid-liquid separator and the clean water tank are sequentially communicated through pipelines; a lifting pump is arranged on a pipeline between the water collecting tank and the Fe-anaerobic device, a discharge port of the solid-liquid separator is communicated with an inlet of the plate-and-frame filter press through a pipeline, and a filtrate outlet of the plate-and-frame filter press is communicated with a clean water tank through a pipeline.

The air outlet of the fan is simultaneously communicated with the air inlets of the biological selector and the MBBR bioreactor through the air pipes.

The utility model discloses an each part is existing equipment, can purchase the acquisition outward.

The utility model discloses a processing step is:

the catch basins are arranged around the sludge storage yard, the percolate flows into the catch basin (the catch basin is buried underground) after being collected by the catch basins, and the percolate in the catch basin is pumped into a subsequent unit by the lift pump for treatment.

The leachate in the water collecting tank enters an Fe-anaerobic device, Fe powder is added in an amount of 400 mg/L, the pH value is 7.0-9.0, the sludge concentration is 2000 mg/L, the retention time is 8h, the Fe powder can enhance the degradation of refractory substances in water through means of adsorption, chemical action, electron supply and the like, the Fe powder provides a reaction surface for anaerobic microorganisms, the effects of static electricity, adsorption, mass transfer and conversion are favorably realized, the adsorption characteristic of the refractory substances in water is enhanced, the Fe powder is used as a carrier to provide a place for the microorganisms to gather, propagate and grow, and a stable Fe-microbial system is gradually formed.

The mixed liquid treated by the Fe-anaerobic device enters a biological selector, and organic matters in the mixed liquid are adsorbed on the surface by sludge with strong activity, so that the BOD in the mixed liquid is rapidly reduced; the organic matter adsorbed on the surface of the sludge particles is hydrolyzed into soluble small molecules and returns to the mixed liquid, so that BOD in the water begins to rise again. Soluble micromolecular organic matters in the mixed solution penetrate through cell membranes to enter cells, the bacterial load of zoogloea is controlled to be 150mgCOD/gVSS within 30min, and the removal rate of degradable soluble COD in the mixed solution is 65%. The bacteria meeting the requirement are selected by changing the oxygen content, and the hydraulic retention time is 20 min. The floc forming bacteria absorb more organic matters and store in the body, and the floc forming bacteria grow continuously by utilizing the part of the organic matters after entering the main aeration area, so that the floc forming bacteria are dominant, and the sludge bulking is controlled.

The liquid treated by the biological selector enters the MBBR bioreactor. In thatA certain amount of polyethylene plastic suspension filler is added into the MBBR bioreactor, the filler is a small cylinder with the diameter of 10mm and the height of 8mm, the filling ratio is 0.7, and the surface area is 700m²/m³The volume load of the reactor was 1.5kgCOD_Cr/(m³D), the ratio of gas to water is 4: 1, the dissolved oxygen is kept at 2 mg/L, air bubbles are finer by utilizing the collision and shearing action of the filler in water during aeration, the utilization rate of oxygen is increased, and an aerobic zone or an anoxic zone is formed at different parts of the biological membrane by controlling the DO concentration, so that the nitrification reaction and the denitrification reaction exist simultaneously, and the treatment effect is improved.

And the liquid treated by the MBBR enters a solid-liquid separator for mud-water separation, the separated supernatant enters a subsequent clear water tank, the precipitate is subjected to filter pressing by a plate-and-frame filter press at regular intervals to form mud cakes, and the filtrate is discharged into the clear water tank. The treated water quality reaches the first-level standard (pH 6-9, COD) in Table 4 in Integrated wastewater discharge Standard (GB8978-1996)_Cr100 mg/L) and then all are recycled through the output of a lift pump, and can be used for greening irrigation and wet dust removal in factory production workshops and factory areas.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms sump, Fe-anaerobic, biological selector, MBBR bioreactor, solid-liquid separator, clean water basin, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a sludge storage yard filtration liquid processing system which characterized in that: the system comprises a plurality of collectors which are sequentially communicated through pipelinesPool (1), Fe⁰An anaerobic reactor (2), a biological selector (3), an MBBR bioreactor (5), a solid-liquid separator (6) and a clean water tank (7).

2. The sludge yard leachate treatment system of claim 1, wherein: the water collecting tank and the Fe⁰A lift pump is arranged on the pipeline between the anaerobic devices.

3. The sludge yard leachate treatment system of claim 2, wherein: the device also comprises a plate-and-frame filter press (8); the discharge port of the solid-liquid separator is communicated with the inlet of the plate-and-frame filter press through a pipeline, and the filtrate outlet of the plate-and-frame filter press is communicated with a clean water tank through a pipeline.

4. The sludge yard leachate treatment system of claim 3, wherein: the device also comprises a fan (4); and the air outlet of the fan is simultaneously communicated with the air inlets of the biological selector and the MBBR bioreactor through air pipes.