CN102910732B - Method for rapidly starting anaerobic reactor by high-concentration organic wastewater - Google Patents
Method for rapidly starting anaerobic reactor by high-concentration organic wastewater Download PDFInfo
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Abstract
The invention discloses a method for rapidly starting an anaerobic reactor by high-concentration organic wastewater. The method comprises the following steps of: inoculating preprocessed sludge mixed liquor into the anaerobic reactor to be started, and implementing the first-stage water feeding starting of the anaerobic reactor, wherein the duration time of water power keeps unchanged for 48 hours, and the concentration of fed water is gradually enhanced to the design value from a design value which is blow 20%; and after the first-stage water feeding starting of the anaerobic reactor, inoculating sludge into the anaerobic reactor and implementing the second-stage water feeding starting of the anaerobic reactor, wherein the concentration of fed water is a design concentration value without changing, and the duration time of the water power is gradually reduced step by step to a design value, thus starting the reactor successively. By performing optical control on the injection and reactor starting processes, the method can be used for rapidly starting the reactor and has the advantages of reducing the dosage of alkalinity and preventing the acidification of the reactor in the starting process.
Description
Technical field
The present invention relates to a kind of starting method of anaerobic reactor, relate in particular to the method that a kind of high concentrated organic wastewater starts anaerobic reactor fast.
Background technology
Anaerobic reactor is a kind of effective, the economic wastewater processing technology that the recycling of will remove organism in the waste water and biogas energy combines, in recent years, along with the development of people to the deep and bio-science technology of anaerobic technology principle understanding, the anaerobic biological reactor technology is able to develop rapidly, is widely applied in the high-concentration industrial organic waste water process field.Matter of utmost importance during anaerobic reactor is used is exactly the starting problem of reactor.
In the prior art, during starting, high-rate anaerobic reactor has following problem:
The one, start time is long, will be without the non-particulate sludge seeding of taming in newly-built anaerobic biological reactor, reactor is progressively improved from initial load reach the design organic loading, and in reactor, turn out the active height of sufficient amount, the anaerobic grain sludge that settling property is good, this process is called the startup of reactor.The startup of reactor and granular sludge are carried out synchronously.Because the generation time of anaerobion is long, Specific incremental rate is lower, and mud increasess slowly, so anaerobic biological reactor is generally longer start time, needs 4～6 months even longer.In Practical Project, successfully start fast reactor and be the key link in the whole waste water treatment engineering, toggle speed becomes the bottleneck of restriction anaerobic technique widespread use;
The 2nd, the problem of acidifying in the anaerobic reactor start-up course, under anaerobic, the easily biodegradable organics such as carbohydrate and simple organic can be converted into volatile acid very soon, start in the process of anaerobic reactor at high concentrated organic wastewater, because concentration of substrate is high, can produce a large amount of volatile acids, cause easily accumulation, suppress the activity of methanobacteria; Reactor system in start-up course is stable not in addition, and surge capability is poor, and the accumulation of volatile acid can cause anaerobic reactor " acidifying " and make the startup of reactor failed.So high concentrated organic wastewater starts in the anaerobic reactor process needs to add a large amount of basicity, to keep value suitable in the reactor.But in engineering, add basicity, cause the production equipment working cost expensive, be directly connected to the economic feasibility of anaerobic technique.Therefore, how to prevent the generation of reactor acidifying in start-up course, effectively reducing alkalinity demand also is one of key issue in the anaerobic reactor start-up course.
Summary of the invention
The purpose of this invention is to provide a kind of quick startup of energy realization response device, the dosage of minimizing basicity, and can prevent that the high concentrated organic wastewater of the generation of reactor acidifying phenomenon in the start-up course from starting the method for anaerobic reactor fast.
The objective of the invention is to be achieved through the following technical solutions:
High concentrated organic wastewater of the present invention starts the method for anaerobic reactor fast, comprises step:
The pre-treatment of seed sludge: get sewage treatment plant dewater sludge, the rear tap water that adds stirs, precipitates in the input container, until the rear supernatant liquor of discharging of Sludge Bed sinking, and 2～3 times so repeatedly, to remove impurity in the mud;
Inoculation: being inoculated in the anaerobic reactor to be started through pretreated mud mixed liquid;
Fs starts: begin after inoculation is finished that water inlet starts to anaerobic reactor, keep hydraulic detention time be 48 hours constant, influent concentration progressively improves influent concentration to the design concentration value from below 20% of design concentration value;
Again inoculation: seed sludge in the anaerobic reactor again after the startup of fs, adopt the Aerobic Pond mud of sewage work and the mixed solution of anaerobic pond mud after concentrated, to inoculate, microorganism in the mud of new inoculation is take the mud flco of first inoculation as carrier, apposition growth;
Subordinate phase starts: water inlet started to anaerobic reactor again after inoculation was finished again, kept the design concentration value constant influent concentration, progressively reduced stage by stage hydraulic detention time to the design time value, the reactor start-up success.
As seen from the above technical solution provided by the invention, the high concentrated organic wastewater that the embodiment of the invention provides starts the method for anaerobic reactor fast, by the optimal control to inoculation and reactor start-up process, the quick startup of realization response device, reduce the dosage of basicity, and prevent the generation of reactor acidifying phenomenon in the start-up course.
Description of drawings
The high concentrated organic wastewater that Fig. 1 provides for the embodiment of the invention one starts fast in the method for anaerobic reactor inlet COD concentration and adjusts curve and hydraulic detention time control curve synoptic diagram;
The high concentrated organic wastewater that Fig. 2 provides for the embodiment of the invention two starts fast in the method for anaerobic reactor inlet COD concentration and adjusts curve and hydraulic detention time control curve synoptic diagram;
Among the figure: 1. inlet COD concentration is adjusted curve in the start-up course; 2. hydraulic detention time is controlled curve in the start-up course.
Embodiment
The below will be described in further detail the embodiment of the invention.
High concentrated organic wastewater of the present invention starts the method for anaerobic reactor fast, and its better embodiment comprises step:
The pre-treatment of seed sludge: get sewage treatment plant dewater sludge, the rear tap water that adds stirs, precipitates in the input container, until the rear supernatant liquor of discharging of Sludge Bed sinking, and 2～3 times so repeatedly, to remove impurity in the mud;
Inoculation: being inoculated in the anaerobic reactor to be started through pretreated mud mixed liquid;
Fs starts: begin after inoculation is finished that water inlet starts to anaerobic reactor, keep hydraulic detention time be 48 hours constant, influent concentration progressively improves influent concentration to the design concentration value from below 20% of design concentration value;
Again inoculation: seed sludge in the anaerobic reactor again after the startup of fs, adopt the Aerobic Pond mud of sewage work and the mixed solution of anaerobic pond mud after concentrated, to inoculate, microorganism in the mud of new inoculation is take the mud flco of first inoculation as carrier, apposition growth;
Subordinate phase starts: water inlet started to anaerobic reactor again after inoculation was finished again, kept the design concentration value constant influent concentration, progressively reduced stage by stage hydraulic detention time to the design time value.
High concentrated organic wastewater of the present invention starts the method for anaerobic reactor fast, has solved the problem of anaerobic reactor length start time and can prevent that high concentrated organic wastewater from starting the generation of acidifying phenomenon in the anaerobic reactor process.By the optimal control to inoculation and reactor start-up process, the quick startup of realization response device reduces the dosage of basicity, and prevents the generation of reactor acidifying phenomenon in the start-up course.
Specifically may further comprise the steps:
(1) pre-treatment of seed sludge.Get sewage treatment plant dewater sludge, add tap water after dropping in the container, stir, precipitation, after Sludge Bed is sunk, discharge supernatant liquor, 2～3 times so repeatedly, to reach the purpose of removing impurity and other irrelevant material in the mud;
(2) inoculation.The mud mixed liquid that the concentration of processing through step (1) is about 20g/L is inoculated in the anaerobic reactor to be started;
(3) fs starts.Begin after inoculation is finished reactor water inlet startup, the employing stage improves influent concentration and reduces the method that hydraulic detention time combines, and reactor is started.Particularly, keeping hydraulic detention time is that 48h is constant, and influent concentration doubles from 20% of the design concentration value at every turn, progressively brings up to the design influent concentration.
(4) again inoculation.In the step start-up course of (3) fs, the sludge part of inoculating in the reactor floats owing to losing activity, run off with water outlet, sludge concentration reduces in the reactor, excess sludge is the better mud of quality in the reactor, and at this moment seed sludge in the reactor again adopts the mixed solution of sewage work's Aerobic Pond mud and anaerobic pond mud to inoculate after concentrated, then the inoculation fresh sludge in microorganism take first the inoculation the mud flco as carrier, apposition growth.
(5) subordinate phase starts.Subordinate phase starts the method that same employing stage raising influent concentration combines with the reduction hydraulic detention time, particularly, influent concentration has been brought up to design concentration and has been remained unchanged, and progressively reduces stage by stage hydraulic detention time to the design time value, the reactor start-up success.
Compared with prior art, the invention has the beneficial effects as follows: 1. the employing stage is improved the method that influent concentration combines with the reduction hydraulic detention time, start early stage because hydraulic detention time is longer, be conducive to the growth of mud, because through the startup of fs, mud stability is better, fast reducing hydraulic detention time in the subordinate phase start-up course, the sluicing effect is stronger, has to utilize the mud flco to the transformation of granule sludge.2. the employing stage is improved the method that influent concentration combines with the reduction hydraulic detention time, startup concentration of substrate in early stage is low, volatile acid output is little, be difficult for accumulation, carrying out along with start-up course, the shock absorption of reactor strengthens gradually, and this method can effectively prevent the generation of reactor acidifying phenomenon, greatly reduces the dosage of basicity.
Embodiment one, as shown in Figure 1:
Start anaerobic baffled reactor with high concentration starch water, starch wastewater COD concentration is 10000mg/L.Start-up course may further comprise the steps:
(1) pre-treatment of seed sludge.Get sewage treatment plant dewater sludge, rear adding tap water stirs, precipitates in the input container, until the rear discharge of Sludge Bed sinking supernatant liquor, 3 times so repeatedly;
(2) inoculation.The concentration that process step (1) was processed is the mud mixed liquid input anaerobic baffled reactor of 20g/L;
(3) fs starts.The maintenance hydraulic detention time is 48h, and inlet COD concentration is 2000mg/L, after effluent COD concentration is stable, progressively improves inlet COD concentration to 5000mg/L, 10000mg/L;
(4) again inoculation.After the fs stable water outlet, get sewage work's Aerobic Pond and anaerobic pond mud and mix, the concentrated rear reactor that drops into;
(5) subordinate phase starts.Keeping inlet COD concentration is that design concentration value 10000mg/L is constant, and hydraulic detention time shortens to 24h, 12h from 48h, the reactor start-up success, and successfully turned out granule sludge.
Embodiment two, as shown in Figure 2:
Start anaerobic baffled reactor with high concentration starch water, starch wastewater COD concentration is 10000mg/L.Start-up course may further comprise the steps:
(1) pre-treatment of seed sludge.Get sewage treatment plant dewater sludge, rear adding tap water stirs, precipitates in the input container, until the rear discharge of Sludge Bed sinking supernatant liquor, 3 times so repeatedly;
(2) inoculation.The concentration that process step (1) was processed is the mud mixed liquid input anaerobic baffled reactor of 20g/L;
(3) fs starts.Divide three processes to carry out: 1. hydraulic detention time is 48h, and inlet COD concentration is 2000mg/L, after effluent COD concentration is stable.2. keeping hydraulic detention time is that 48h is constant, improves inlet COD concentration to 4000mg/L.3. hydraulic detention time is reduced to 24h, keeps inlet COD concentration 4000mg/L constant.
(4) again inoculation.After the fs stable water outlet, get sewage work's Aerobic Pond and anaerobic pond mud and mix, the concentrated rear reactor that drops into;
(5) subordinate phase starts.The then operation of fs, minute three processes are carried out: 1. keeping hydraulic detention time is that 24h is constant, improves inlet COD concentration to 8000mg/L.2. hydraulic detention time is reduced to 12h, keeps inlet COD concentration 8000mg/L constant.3. keeping hydraulic detention time is that 12h is constant, improves inlet COD concentration to 10000mg/L, the reactor start-up success, and successfully turned out granule sludge.
The above only is the better embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (1)
1. a high concentrated organic wastewater starts the method for anaerobic reactor fast, and the COD design concentration value of described high concentrated organic wastewater is 10000mg/L, it is characterized in that, comprises step:
The pre-treatment of seed sludge: get sewage treatment plant dewater sludge, the rear tap water that adds stirs, precipitates in the input container, until the rear supernatant liquor of discharging of Sludge Bed sinking, and 2～3 times so repeatedly, to remove impurity in the mud;
Inoculation: being inoculated in the anaerobic reactor to be started through pretreated mud mixed liquid;
Fs starts: begin after inoculation is finished that water inlet starts to anaerobic reactor, keep hydraulic detention time be 48 hours constant, influent concentration progressively improves influent concentration to the design concentration value from below 20% of design concentration value;
Again inoculation: seed sludge in the anaerobic reactor again after the startup of fs, adopt the Aerobic Pond mud of sewage work and the mixed solution of anaerobic pond mud after concentrated, to inoculate, microorganism in the mud of new inoculation is take the mud flco of first inoculation as carrier, apposition growth;
Subordinate phase starts: water inlet started to anaerobic reactor again after inoculation was finished again, kept the design concentration value constant influent concentration, progressively reduced stage by stage hydraulic detention time to the design time value, the reactor start-up success.
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| CN104445610B (en) * | 2014-12-23 | 2016-10-19 | 长春建筑学院 | Anaerobic co-metabolism processes the method for brown coal upgrading waste water |
| CN110615526B (en) * | 2018-06-20 | 2022-03-29 | 中国石油化工股份有限公司 | Starting method of anaerobic ammonia oxidation process |
| CN113912183B (en) * | 2021-11-25 | 2023-08-29 | 上海应用技术大学 | Method for measuring effective residence time of anaerobic biochemical process of wastewater |
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