CN102674625B - Treatment method for greenhouse turtle breeding wastewater - Google Patents
Treatment method for greenhouse turtle breeding wastewater Download PDFInfo
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- CN102674625B CN102674625B CN2012100352800A CN201210035280A CN102674625B CN 102674625 B CN102674625 B CN 102674625B CN 2012100352800 A CN2012100352800 A CN 2012100352800A CN 201210035280 A CN201210035280 A CN 201210035280A CN 102674625 B CN102674625 B CN 102674625B
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Abstract
The invention discloses a treatment method for greenhouse turtle breeding wastewater. By regarding an enhanced biofiltration system and a deep fluid water planting vegetable bed as a core, organically combining biological and ecological treatment, the method comprises the following specific steps: firstly introducing the greenhouse turtle breeding wastewater into a quick sedimentation basin to remove suspension in the wastewater; then introducing the wastewater into the enhanced biofiltration system to remove degradable organic matters and pollutants such as nitrogen and phosphorus; and flowing the tail water into the deep fluid water planting vegetable bed to perform deep treatment, and further removing nitrogen and phosphorus through synergistic effect of vegetable growth absorption and microorganism at roots. According to the method, the process is simple, the management and the maintenance are convenient, the effect is stable, the operation cost is low and the economic benefit is significant.
Description
Technical field
The invention belongs to environmental technology field, relate to a kind of greenhouse breeding soft-shell turtle method of wastewater treatment.
Background technology
Soft-shelled turtle nourishing is abundant, contains protein, fat, calcium, iron, gelatin, Keratin sulfate and multivitamin, is rare invigorant, is the treasure of fishery products.China is the largest country of breeding soft-shell turtle in the world, raising along with China's living standards of the people, domestic consumption to soft-shelled turtle is increasing, China joined WTO, the high-quality fishery products such as soft-shelled turtle are slowly gone abroad, the areas such as outlet South East Asia, Japan, greatly promoted the development of breeding soft-shell turtle industry, and average growth rate per annum reaches 26%.
Since the eighties in 20th century, China starts to rise batch production high-density breeding soft-shelled turtle.High-density breeding soft-shell turtle mode, because of characteristics such as its high efficiency, soft-shelled turtle body are grown up soon, cultivating condition is easy to control, has become the prevailing model of China's breeding soft-shell turtle industry.The high-density breeding mode mainly adopts totally enclosed concrete-steel greenhouse, and cultivation density reaches 25-30/m
2.During higher than 20 ℃, soft-shelled turtle starts to ingest when water temperature, and food ration raises and increases with water temperature.If water temperature is during lower than optimum temps, the synthetic level of soft-shelled turtle body digestive ferment is low, and feed conversion rate is low; Water temperature during higher than optimum temps,, because soft-shelled turtle body activity increases, also can reduce feed conversion rate.Therefore, in order to guarantee the good growth of testudinate in greenhouse, the water temperature general control in greenhouse is at 30-32 ℃, and should keep constant as far as possible.
The main feeding of greenhouse soft-shelled turtle is take the high protein fish meal as main body, and mixes the vegetable-proteins such as Radix Dauci Sativae, garlic and coordinate the bait that forms.In soft-shelled turtle food process, directly waste rate of feed 10-20%, eat the 80-90% feed of soft-shelled turtle body, has again 60-65% nitrogen phosphorus to enter sewage after the soft-shelled turtle body transforms, and the nitrogen phosphorus that both amount in the 70-85% feed will enter in breeding wastewater.At present, can only rely on regular draining to realize the cleaning in greenhouse, reduce the generation of contagious disease.Greenhouse breeding soft-shell turtle industry water loss is high, and it is estimated and produce 1kg soft-shelled turtle water consumption 0.4kg/ days, be calculating in 1 year by the culture-cycle, produce the 1kg soft-shelled turtle and need approximately 150kg water.Calculate by the whole nation, will have every year more than 3,100 ten thousand tons of greenhouse breeding soft-shell turtle waste water to enter water body.According on the-spot investigation, greenhouse breeding soft-shell turtle waste water nitrogen and phosphorus content is very high, total nitrogen (TN) 50-200mg/L, total phosphorus (TP) 5-15mg/L, chemical oxygen demand (COD) (COD) 100-200 mg/L.Also do not have at present a cover for greenhouse breeding soft-shell turtle waste water quality, that contaminant removal efficiency is high, operational administrative simple, the treatment process that is fit to apply, most of breeding soft-shell turtle field, greenhouse waste water directly discharges without any processing, cause peripheral body eutrophication, have a strong impact on peripheral ecotope and resident physically and mentally healthy, the complaint event happens occasionally, and has seriously restricted the sound development of greenhouse breeding soft-shell turtle industry.
Greenhouse breeding soft-shell turtle waste water TN content is high, and the COD relative concentration is lower, belongs to low C/N ratio wastewater, adopts traditional biological denitrification method necessary additional carbon, economy and poor operability.Simultaneously, rural area breeding soft-shell turtle greenhouse cultivation small scale, water displacement is relevant with the growth phase of soft-shelled turtle with water quality, and dynamic changes greatly.Therefore,, for operational condition and the breeding wastewater water quality of breeding soft-shell turtle field, greenhouse, must find a kind of simple, economic and effective treatment process.
Summary of the invention
The purpose of this invention is to provide a kind of greenhouse breeding soft-shell turtle method of wastewater treatment of suitable rural area, the advantage such as it is simple that the method has technique, and management maintenance is convenient, and effect stability is reliable, and working cost is low, and economic return is remarkable.
The technical solution used in the present invention is:
A kind of greenhouse breeding soft-shell turtle method of wastewater treatment, comprise the steps:
(1). breeding soft-shell turtle waste water precipitation in regulating settling tank in greenhouse obtains supernatant liquor;
(2). supernatant liquor enters enhanced biological and filters denitrification dephosphorization system and realize that carbon nitrogen phosphorus synchronously removes;
(3). the water outlet after biological reinforced denitrogenation dephosphorizing is processed enters dark liquid flowing water training Vegetable System and carries out advanced treatment, and tail water enters natural paddy wetland comprehensive utilization.
Greenhouse breeding soft-shell turtle waste water described in step (1) only carries out precipitation and water quality in regulating settling tank, the water yield is regulated.
Enhanced biological filtration treatment system described in step (2), the built-in biological filtrate, height of filter media layer is 1.2m, in settling tank, supernatant liquor evenly enters the bottom of filtering system by pipeline distributor through volume pump, the stainless steel aeration tube is arranged in the system bottom, uniform aeration, and volume pump and aeration pump are realized intermittent water inflow and intermittent oxygen supply by Control, guarantee anoxic/aerobic environment alternately, impel nitrogen phosphorus to remove.
Dark liquid flowing water training Vegetable System described in step (3) adopts the design of inserted type groove cover plate, guarantees the root system environment sealing, reduces bad root phenomenon; Dark liquid flowing water training Vegetable System is under aeration condition not, and waste water is at bed body sluggish flow, and current drive oxygen and enter a body, supply with the root system of plant microorganism growth, plant and microorganism form fine and close little territory environment, promote the nitrification and denitrification effect, and nitrogen phosphorus is removed; Dark liquid flowing water training Vegetable System adopts the deflector type operation, guarantees dark liquid flowing water training bed hydraulic detention time, increases vegetables and absorbs usefulness.
The beneficial effect that the present invention has is:
Technique is simple, is convenient to management maintenance, and capital construction, working cost are moderate, is fit to the processing of greenhouse, rural area breeding soft-shell turtle waste water.
Effluent quality is good: the indexs such as pH value, COD, ammonia nitrogen, total nitrogen, total phosphorus all can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard-required.
The enhanced biological filtering system adopts intermittent aeration, does not add external carbon source, adopts intermittent aeration, and maximum amplitude realizes the carbon source comprehensive utilization, by the nitrification and denitrification total nitrogen, removes; Simultaneously, mineralized nitrogen is the absorption that nitric nitrogen is beneficial to follow-up Vegetable System.
Dark liquid flowing water training vegetables bed, do not carry out aeration without additionaling power, relies on the coupling of vegetable root system sorption and rhizosphere microbial to remove nitrogen phosphorus in tail water, pass through circulating baffling, increase hydraulic detention time, sluggish flow increases dissolved oxygen and enters the vegetables bed, prevents vegetable root rot.
Description of drawings
Fig. 1 is the inventive method processing flow chart.
Embodiment
Below in conjunction with accompanying drawing and specific examples, the present invention is further described:
Embodiment is the greenhouse breeding soft-shell turtle wastewater treatment process of certain typical breeding soft-shell turtle cooperative society of Zhejiang Hangzhou area, this is processed and processes breeding soft-shell turtle waste water 1-1.5 ton engineering day, soft-shelled turtle greenhouse cultivation waste water quality situation is: COD 101.7-168.8 mg/L, ammonia nitrogen 4.0-52.5mg/L, total nitrogen 10.5-56.2mg/L, total phosphorus 1.4-11.7mg/L.
As Fig. 1, at first greenhouse breeding soft-shell turtle waste water enter the adjusting settling tank, and the settling tank useful volume is about 6 m
3.The adjusting settling tank mainly rises and removes suspended substance in greenhouse breeding soft-shell turtle waste water, evenly the effect of water quality.
Subsequently, greenhouse breeding soft-shell turtle waste water is controlled through volume pump, by water distribution pipe, enters the enhanced biological filtering system.The enhanced biological filtering system adopts the mode of bottom water inlet, makes sluggish flow increase and fully contacts with filtrate, and aeration tube is arranged in the bottom, biological filter, and the environment of inside, filter tank forms from bottom to up aerobic-double oxygen, for the nitrification and denitrification denitrogenation provides excellent environment.The volume of biological filter is 5.1m
3, length * wide * height is 5m * 0.6m * 1.7m, effectively filter height is 1.2m.Greenhouse breeding soft-shell turtle waste water is after the enhanced biological filtering system, and the COD clearance is 30-80%, and the clearance of ammonia nitrogen reaches 60-100%, and after steady running, the water outlet ammonia nitrogen concentration is about 1-2.5 mg/L, and total tp removal rate is 30-90% approximately, and total nitrogen is removed efficiency and is about 50-70%.
The water outlet of enhanced biological filtering system enters dark liquid flowing water training vegetables bed, and useful volume is 1.125m
3.Dark liquid flowing water training vegetables bed adopts natural reaeration, does not carry out artificial aeration's processing.Current are circulating baffling, increase vegetables root and waste water action time.After the processing of vegetable hydroponic system, the waste water COD clearance is 30～50%, TN clearance more than 80%, and the clearance of TP is 40～80%.
Greenhouse breeding soft-shell turtle waste water is after above-mentioned art breading, and the indexs such as pH value, COD, ammonia nitrogen, total nitrogen, total phosphorus all can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard-required.
The concrete treatment effect of this technique such as following table
Claims (1)
1. greenhouse breeding soft-shell turtle method of wastewater treatment, the total nitrogen of described breeding wastewater is 50-200mg/L, and total phosphorus is 5-15mg/L, and chemical oxygen demand (COD) is 100-200 mg/L, it is characterized in that the method comprises the steps:
(1). breeding soft-shell turtle waste water precipitation in regulating settling tank in greenhouse obtains supernatant liquor;
(2). supernatant liquor enters enhanced biological and filters denitrification dephosphorization system and realize that carbon nitrogen phosphorus synchronously removes;
(3). the water outlet after biological reinforced denitrogenation dephosphorizing is processed enters dark liquid flowing water training Vegetable System and carries out advanced treatment, tail water enters natural paddy wetland comprehensive utilization, and tail water discharging wherein meets " urban wastewater treatment firm pollutant emission standard " one-level A standard-required;
Greenhouse breeding soft-shell turtle waste water described in step (1) only carries out precipitation and water quality in regulating settling tank, the water yield is regulated;
Enhanced biological filtration treatment system described in step (2), the built-in biological filtrate, height of filter media layer is 1.2m, in settling tank, supernatant liquor evenly enters the bottom of filtering system by pipeline distributor through volume pump, the stainless steel aeration tube is arranged in the system bottom, uniform aeration, and volume pump and aeration pump are realized intermittent water inflow and intermittent oxygen supply by Control, guarantee anoxic/aerobic environment alternately, impel nitrogen phosphorus to remove;
Dark liquid flowing water training Vegetable System described in step (3) adopts the design of inserted type groove cover plate, guarantees the root system environment sealing, reduces bad root phenomenon; Dark liquid flowing water training Vegetable System is under aeration condition not, and waste water is at bed body sluggish flow, and current drive oxygen and enter a body, supply with the root system of plant microorganism growth, plant and microorganism form fine and close little territory environment, promote the nitrification and denitrification effect, and nitrogen phosphorus is removed; Dark liquid flowing water training Vegetable System adopts the deflector type operation, guarantees dark liquid flowing water training bed hydraulic detention time, increases vegetables and absorbs usefulness.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104944586B (en) * | 2015-05-22 | 2017-03-22 | 浙江海洋学院 | Cascade culture wastewater treatment device |
| CN104876398B (en) * | 2015-05-22 | 2017-03-08 | 浙江海洋学院 | Ecological purified water method with cleaning function |
| CN104944585B (en) * | 2015-05-22 | 2017-03-22 | 浙江海洋学院 | Technological process for manufacture forming of laminate device for float-state treatment of tail water |
| CN104891617B (en) * | 2015-05-29 | 2018-04-24 | 中国水产科学研究院淡水渔业研究中心 | A kind of floating flowing water culture sink |
| CN105621618A (en) * | 2016-01-12 | 2016-06-01 | 沈勤 | Livestock/poultry aquiculture wastewater ecological treatment system |
| CN105541033A (en) * | 2016-01-12 | 2016-05-04 | 沈勤 | Livestock and poultry aquaculture wastewater ecological treatment system |
| CN105906138A (en) * | 2016-04-23 | 2016-08-31 | 桐乡市大麻海北圩水产专业合作社 | Soft-shelled turtle greenhouse tail water treatment system |
| CN106946412A (en) * | 2017-04-26 | 2017-07-14 | 镇江科华渔业发展有限公司 | A kind of sturgeon cultivation Waste Water Treatment |
| CN107265755B (en) * | 2017-06-07 | 2020-10-27 | 深圳市太空科技南方研究院 | Closed circulation aquaculture water treatment system and method |
| CN108203161B (en) * | 2018-02-13 | 2020-09-04 | 中国科学院烟台海岸带研究所 | Aquaculture water treatment and recycling device and treatment method |
| CN110973055A (en) * | 2019-12-10 | 2020-04-10 | 安徽科技学院 | Ecological breeding system of soft-shelled turtle |
| CN111115962B (en) * | 2020-01-03 | 2022-03-22 | 中国科学院海洋研究所 | Method for multi-combination treatment of industrial mariculture tail water |
| CN114586712A (en) * | 2022-03-21 | 2022-06-07 | 江西省水产科学研究所(江西省鄱阳湖渔业研究中心、江西省渔业资源生态环境监测中心) | Reservoir flow culture micropterus salmoides and vegetable-rice planting cooperation method |
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| CN101397178B (en) * | 2008-08-14 | 2012-01-11 | 中国地质大学（武汉） | Livestock and poultry raising sewage disposal process and disposal system thereof |
| CN102283168B (en) * | 2011-06-22 | 2012-09-05 | 浙江大学 | Low-carbon ecological energy-regenerating greenhouse cultivating mode for soft-shelled turtles |
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