CN103693809B - Anaerobic biological treatment system for fruit juice wastewater - Google Patents

Anaerobic biological treatment system for fruit juice wastewater Download PDF

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Publication number
CN103693809B
CN103693809B CN201310684479.0A CN201310684479A CN103693809B CN 103693809 B CN103693809 B CN 103693809B CN 201310684479 A CN201310684479 A CN 201310684479A CN 103693809 B CN103693809 B CN 103693809B
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water outlet
fruit juice
water
pond
water inlet
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Expired - Fee Related
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CN201310684479.0A
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CN103693809A (en
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贺超
刘永红
刘宗宽
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Xian Jiaotong University
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Xian Jiaotong University
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    • Y02W10/12

Abstract

The invention discloses an anaerobic biological treatment system for fruit juice wastewater. The anaerobic biological treatment system comprises a fruit juice wastewater adjusting pond, wherein the water outlet of the fruit juice wastewater adjusting pond is connected with the water inlet of an anaerobic reactor after being filtered through a screen, the water outlet of the anaerobic reactor is connected with the water inlet of the anaerobic reactor through a water reflowing pipe, the water outlet of the anaerobic reactor is connected with the water inlet of a PVA (Polyvinyl Acetate) oxidation pond, the water outlet of the PVA oxidation pond is connected with the water inlet of an activated sludge pond, the water outlet of the activated sludge pond is connected with the water inlet of a settling pond, the water outlet of the settling pond is connected with the water inlet of a filtering pond, water from the water outlet of the filtering pond is recycled by a workshop or discharged when reaching the standard, the sludge outlet of the settling pond is connected with the sludge inlet of the activated sludge pond through a sludge reflowing pipe, or the sludge is directly utilized. The anaerobic biological treatment system realizes that fruit juice wastewater is discharged when reaching the standard under the conditions of low cost, low sludge content and low energy consumption, and provides a technical basis and reference to design, debug and operation management of relevant projects.

Description

A kind of Anaerobic biological treatment system for fruit juice wastewater
Technical field
The present invention relates to environmental engineering, technical field of water pollution control biological wastewater treatment technology, be specifically related to a kind of Anaerobic biological treatment system for fruit juice wastewater.
Background technology
Current Chinese concentrated Succus Mali pumilae output has accounted for 70% of world's total amount of transactions, and fruit juice industry brings the income of tens billion of unit every year to country.
Juice production enterprise is while making tremendous contribution for China's economic, and the environmental problem brought especially waste water pollution problem seems particularly outstanding.Fruit juice production factory often processes 1 ton of raw material, generally can produce 3.8-10.5m 3waste water.Due to the high organic loading of Fruit Juice-producing Wastewater and acid base concentration change, cause river ecosystem structural damage, on the ingesting of fish, to grow and the crop yield of periphery and quality all cause serious impact.
Fruit juice production industry developing history is more late, and the research of its wastewater treatment relatively lags behind in the research of other high concentrated organic wastewater process such as beer, alcohol waste water.Based on aerobic treatment process, what the wastewater treatment of current fruit juice factory adopted also exist that energy consumption is high, mud amount is large, water quality is difficult to the problems such as up to standard, not have the waste water treatment process technology of comparatively maturation.The process of fruit juice wastewater generally adopts the way of Traditional materialized+biochemical treatment, technique copies other organic wastewater treatment process to design mostly, acidication one contact oxidation technology is precipitated as adopted lime slurry neutralization, CAST technique, inclined plate gas-liquid-solid separator UASB-bio-contact oxidation tandem process and UASB-EIC technology.Due to juice production special process and reckon without the own characteristic of fruit juice wastewater, much all in operation process, create series of problems, treatment effect is generally undesirable.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of Anaerobic biological treatment system for fruit juice wastewater, realize the qualified discharge under fruit juice wastewater low cost, low mud, less energy-consumption condition, for the design of correlation engineering, debugging and operational management provide technical basis and reference.
In order to achieve the above object, the technical scheme that the present invention takes is:
A kind of Anaerobic biological treatment system for fruit juice wastewater, comprise fruit juice wastewater equalizing tank, the water outlet of fruit juice wastewater equalizing tank is connected with the water inlet of anaerobic reactor by after screen filtration, connected by water return line between the water outlet of anaerobic reactor and water inlet, the water outlet of anaerobic reactor is connected with the water inlet of PVA oxidation pond, the water outlet of PVA oxidation pond is connected with the water inlet of activated sludge tank, the water outlet of activated sludge tank is connected with the water inlet of settling tank, the water outlet of settling tank is connected with the water inlet of filtering basin, the Water circulation production plant of the water outlet of filtering basin or qualified discharge, the mud mouth of settling tank is connected with the mud inlet of activated sludge tank by mud return line, or directly carry out mud utilization.
Described fruit juice wastewater equalizing tank, PVA oxidation pond, activated sludge tank are all connected with acid-alkali accommodation device.
Described anaerobic reactor adopts tower high-load anaerobic bio-reactor, and water outlet is back to reactor waterwater entrance in a large number, and reduce reactor to the demand of basicity by dilution influent concentration, control reflux ratio is 3:1.
Described PVA oxidation pond is the bio-oxidation pond of filling PVA spheroidal particle, and wherein PVA spherical particle diameters 4mm, be the porous medium of internal gutter 20 ~ 40 microns, apposition growth inside and outside it is also full of microbial bacterial.
Advantage of the present invention:
(1) acid-alkali accommodation device and fruit juice wastewater equalizing tank are set, solve in juice production process because of every day several nitric acid, hydrochloric acid, caustic soda, clean and sterilize production facility and each storage tank such as SYNTHETIC OPTICAL WHITNER, cause in fruit juice wastewater process, there is pH fluctuation large, containing the danger that highly basic, strong acid impact.
(2) water outlet of tower high-load anaerobic bio-reactor is back to reactor waterwater entrance in a large number, reactor is reduced to the demand of basicity by dilution influent concentration, control reflux ratio is 3:1, makes anaerobic reactor under low alkalinity condition, process fruit juice wastewater and high loading steady running.
(3) advantages such as Anaerobic wastewater treatment technical operation cost is low, save energy, sludge disposal are easy are utilized, adopt efficient anaerobe softening technology, prevent the accumulation of calcium in waste water, decompose adhesive, thus solve the high unmanageable technical problem of fruit juice wastewater COD value, the organism effectively in process waste water.
(4) Φ 4mm special high-specific surface area PVA spheroidal particle filling PVA oxidation pond is adopted, according to PVA porous medium (internal gutter 20 ~ 40 microns) high characterization of adsorption, apposition growth inside and outside it is also full of microbial bacterial, when fruit juice wastewater is by the PVA reaction tank that is rich in high concentration microorganism, greatly improve waste water treatment efficiency.
(5) the continuous operation result of whole system shows, fruit juice wastewater treatment process system volume load can reach 6.0kgCODm -3d -1, COD clearance is more than 90%.
Accompanying drawing explanation
Accompanying drawing is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to accompanying drawing, a kind of Anaerobic biological treatment system for fruit juice wastewater, comprise fruit juice wastewater equalizing tank, the water outlet of fruit juice wastewater equalizing tank is connected with the water inlet of anaerobic reactor by after screen filtration, connected by water return line between the water outlet of anaerobic reactor and water inlet, the water outlet of anaerobic reactor is connected with the water inlet of PVA oxidation pond, the water outlet of PVA oxidation pond is connected with the water inlet of activated sludge tank, the water inlet of water outlet and settling tank that active sludge subtracts reservoir is connected, the water outlet of settling tank is connected with the water inlet of filtering basin, the Water circulation production plant of the water outlet of filtering basin or qualified discharge, the mud mouth of settling tank is connected with the mud inlet of activated sludge tank by mud return line, or directly carry out mud utilization.
Described fruit juice wastewater equalizing tank, PVA oxidation pond, activated sludge tank are all connected with acid-alkali accommodation device.
Described anaerobic reactor adopts tower high-load anaerobic bio-reactor, and water outlet is back to reactor waterwater entrance in a large number, and reduce reactor to the demand of basicity by dilution influent concentration, control reflux ratio is 3:1.
Described PVA oxidation pond is the bio-oxidation pond of filling PVA spheroidal particle, and wherein PVA spherical particle diameters 4mm, be the porous medium of internal gutter 20 ~ 40 microns, have high characterization of adsorption, apposition growth inside and outside it is also full of microbial bacterial.
Principle of work of the present invention is:
Fruit juice wastewater is from flowing into fruit juice wastewater equalizing tank (according to water-quality constituents and pH value, automatic adjustment potential of hydrogen and rationally nutrition needed for interpolation microorganism), fruit juice equalizing tank waste water is after screen filtration, biological degradation removal 70%COD is carried out with being pumped into tower high-load anaerobic reactor, waste water after anaerobic reactor process 75% sends reactor waterwater entrance back to, dilution original fruit juice waste water, prevents fruit juice wastewater change of water quality on the impact of microorganism, effectively improves the stability of biological treatment.Anaerobic reactor exports other waste water inflow PVA oxidation pond and carries out sewage microorganism sofening treatment further, then flow into activated sludge tank and carry out Aerobic biological process, water after aerobic treatment flows into settling tank and carries out mud-water separation, mud large portion in bottom sends activated sludge tank back to, small portion excess sludge is to be used as him, and top clear water is qualified discharge or reuse needed for practical situation after the filteration of filter tank.
For avoiding fruit juice wastewater impurity too much, reduce bioreactor for treatment waste water COD clearance, fruit juice wastewater is selected to flow into anaerobic biological reactor again after screen filtration unit.For the impact preventing fruit juice wastewater load and pH value to fluctuate on microorganism adaptability and activity, fruit juice wastewater equalizing tank is set, automatically detects waste water pH value simultaneously and regulated.Along with the carrying out of wastewater treatment, can there is pH value fluctuation in PVA oxidation pond and activated sludge tank, Operation system setting acid-alkali accommodation pond is automatically detected pH value and regulated.
Invention effect of the present invention:
Fruit juice wastewater needs to add basic agent before treatment as low alkalinity acidic organic wastewater and regulates inlet flow-patterm, reactor is reduced to the demand of basicity back up through dilution influent concentration, control reflux ratio is 3:1, makes anaerobic reactor under low alkalinity condition, process fruit juice wastewater and high loading steady running.
Adopt acidication process fruit juice wastewater, with the raising gradually of volumetric loading, to fruit juice wastewater COD, BOD 5, T-N, T-P, TOC removal trend be that, when improving load, clearance can decline to some extent, but along with the operation of reactor, clearance improves gradually.To BOD 5, COD and T-N removal effect better.
Fruit juice wastewater treatment system volumetric loading can reach 6.0kgCODm -3d -1, COD clearance is more than 90%.
Adopt native system process fruit juice concentrate waste water, stable operation stage (influent COD, BOD 5, SS is respectively 5968mgL -1, 2130mgL -1, 1020mgL -1, water outlet is respectively 131mgL -1, 10.8mgL -1, 50.2mgL -1) COD, BOD 5, SS clearance be respectively 96%, 99.5% and 95.1%.Waste Water Treatment process waste water can discharge by stably reaching standard, reduces power consumption 70-80% simultaneously, and residue biological sludge quantity discharged is from ton fruit juice 220kg(moisture content 75%) be reduced to below 80kg.

Claims (1)

1. an Anaerobic biological treatment system for fruit juice wastewater, comprise fruit juice wastewater equalizing tank, it is characterized in that: the water outlet of fruit juice wastewater equalizing tank is connected with the water inlet of anaerobic reactor by after screen filtration, connected by water return line between the water outlet of anaerobic reactor and water inlet, the water outlet of anaerobic reactor is connected with the water inlet of PVA oxidation pond, the water outlet of PVA oxidation pond is connected with the water inlet of activated sludge tank, the water outlet of activated sludge tank is connected with the water inlet of settling tank, the water outlet of settling tank is connected with the water inlet of filtering basin, the Water circulation production plant of the water outlet of filtering basin or qualified discharge, the mud mouth of settling tank is connected with the mud inlet of activated sludge tank by mud return line, or directly carry out mud utilization,
Described fruit juice wastewater equalizing tank, PVA oxidation pond, activated sludge tank are all connected with acid-alkali accommodation device;
Described anaerobic reactor adopts tower high-load anaerobic bio-reactor, and water outlet is back to reactor waterwater entrance in a large number, and reduce reactor to the demand of basicity by dilution influent concentration, control reflux ratio is 3:1;
Described PVA oxidation pond is the bio-oxidation pond of filling PVA spheroidal particle, and wherein PVA spherical particle diameters 4mm, be the porous medium of internal gutter 20 ~ 40 microns, apposition growth inside and outside it is also full of microbial bacterial.
CN201310684479.0A 2013-12-13 2013-12-13 Anaerobic biological treatment system for fruit juice wastewater Expired - Fee Related CN103693809B (en)

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Publication number Priority date Publication date Assignee Title
CN105254133A (en) * 2015-11-16 2016-01-20 苏州南风优联环保工程有限公司 Fruit juice wastewater treating process
CN111606524A (en) * 2020-07-08 2020-09-01 福建新德福化工有限公司 Chemical sewage treatment process

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* Cited by examiner, † Cited by third party
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CN1792880A (en) * 2005-11-30 2006-06-28 宋乾武 Tech. for treating waste water of fruit juice processing
CN201033757Y (en) * 2007-03-30 2008-03-12 广州市浩蓝环保技术有限公司 Sewage water treatment system for fruit juice waste water
CN103204591B (en) * 2013-04-15 2014-10-15 杭州浙大易泰环境科技有限公司 Microbiological treatment process for pectin wastewater

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