CN105399275A

CN105399275A - Wastewater treatment method

Info

Publication number: CN105399275A
Application number: CN201510839109.9A
Authority: CN
Inventors: 聂玉庆; 娄中华; 宁明超; 杨猛虎; 蒋佑文; 刘建海; 张晓东; 拓峰鹏; 马朋
Original assignee: Construction Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
Current assignee: Construction Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
Priority date: 2015-11-27
Filing date: 2015-11-27
Publication date: 2016-03-16
Anticipated expiration: 2035-11-27
Also published as: CN105399275B

Abstract

The invention discloses a wastewater treatment method which mainly comprises the following steps: obstructing wastewater through a grating, entering an aerobiont nitration tank, entering a zeolite reaction tank, entering a combined compound biological filtering tank, entering an air stripping tower, entering an artificial wetlands system, and purifying outlet water. The wastewater treatment method is combined with multiple water filtering systems and a nitrogen and phosphorus treating system, has the advantages of being good in outlet water quality, relatively strong in nitrogen and phosphorus treating capability, convenient to operate and maintain, simple to manage and low in investment and operating cost, and is relatively suitable for medium and small towns and countries which are less in fund, short of energy and lack of technical personnel.

Description

A kind of sewage water treatment method

Technical field

The present invention relates to field of environmental improvement, particularly relate to a kind of sewage water treatment method.

Background technology

In recent years, along with carrying out in a deep going way of new countryside construction, by implementing the construction of graceful small towns and rebuilding old villages and Village Redevelopment engineering, villages and small towns infrastructure construction and the environment looks of China some areas there occurs wide variation.Meanwhile, domestic sewage in rural areas discharge problem that is unordered, welding more and more causes extensive concern.But country sewage collection processing system implementing imperfection for a long time, waste water collection rate and processing rate low, have a strong impact on the looks of local water surrounding and integrated environment, and endanger the safety of Urban water supply.Current Rural Water Environment present situation has several feature:

The first, lack sewage collecting and treatment facility, sewage is in line.China more than 95% village and more than 90% all imperfect sewage collecting in little market town and treatment facility, the sanitary sewage produced and part trade effluent, be almost the water body (river course, pond, underground water etc.) directly entering villages and small towns without any process, cause the severe contamination of villages and small towns water body.

The second, water pollution is serious.Because sewage directly enters water body for a long time, in addition villages and small towns water body is usually less, and also less in the mobility of the south of the lower reaches of the Yangtze River water body, environmental capacity is very limited, the result caused be exactly not only water body lose due function, and its also integrated environment in havoc villages and small towns and view.The lake of black smelly river course, pond and eutrophication has become the universal phenomenon of the south of the lower reaches of the Yangtze River that beautiful environment in the past.

Three, water environment pollution and destruction also can produce related polluting effect, unhealthful.Research shows, the generation of numerous disease is all of close concern to each other with water surrounding.Water pollution likely promotes the generation of some malignant diseases.

Four, advanced and applicable sewage disposal technology is targetedly lacked.Because villages and small towns sewage has the features such as water displacement children's disperses, variation water quality is larger, and compared with city, the difference of villages and small towns in the conditions such as society, economy and technology, villages and small towns sewage disposal should not adopt comparatively ripe municipal effluent technique, and some so-called environmental techniques often can not meet processing requirements, or lack the condition (as land resources) implemented.

Summary of the invention

The present invention is exactly for the problems referred to above, proposes a kind of sewage water treatment method, and the method concise in technology, treatment effect are good, takes up an area province, energy consumption is low, operational management is easy, secondary pollution is few.

For solving the problems of the technologies described above, a kind of sewage water treatment method provided by the invention, is made up of following steps:

(1) first sewage is built-in with the tilting pipeline of multiple tracks barrier by one, makes the large-scale particulate matter in sewage, impurity stopped by barrier;

(2) sewage is entered in aerobic nitrification pond;

(3) zeolite reaction tank will then be entered into through aerobic nitrification pond;

(4) by the lifting of the sewage in zeolite reaction tank by pump, combined biological filter is entered into; Fully contact with microbial film wherein;

(5) sewage in combined biological filter is entered in stripping tower;

(6) artificial wet land system is entered into by entering sewage later in stripping tower;

(7) water outlet is purified.

The quantity of the barrier described in described step (1) is at least 4 layers, and the passing hole of later layer barrier is all less than front one deck barrier.

In stripping tower in described step (5), wooden or plastic slat filler is installed.

Sewage water treatment method of the present invention, combine multiple screening system and nitrogen phosphorus treatment system, have effluent quality good, there is stronger nitrogen phosphorus processing power, running maintenance is convenient, management is simple, investment and the low advantage of working cost, compare and be suitable for that fund is few, Small Urban that energy shortage and technician lack and rural area.

Embodiment

Embodiment is adopted to be described in more detail the present invention below.

A kind of sewage water treatment method, is made up of following steps:

(1) first sewage is built-in with the tilting pipeline of multiple tracks barrier by one, makes the large-scale particulate matter in sewage, impurity stopped by barrier; In this step, the quantity of barrier is at least 4 layers, and the passing hole of later layer barrier is all less than front one deck barrier, such vibrational power flow, as far as possible many particulate matter, impurity can be tackled on barrier, for follow-up sewage purification lays the first stone.

(2) sewage is entered in aerobic nitrification pond, mainly under aerobic condition, by the effect of nitrite bacteria and nitrate bacterium, the ammonium oxidation in sewage is become nitrite nitrogen and nitrate nitrogen;

(3) zeolite reaction tank will then be entered into through aerobic nitrification pond, in the middle of practical application, zeolite in zeolite reaction tank mainly uses clinoptilolite, in the three-D space structure of clinoptilolite, the well-regulated pore passage structure of tool and hole, make it have the premium propertiess such as sieve effect, little ring adsorption selectivity, thermostability and shape stability, for the removal of ammonia nitrogen in sewage and adsorptive power stronger.

(4) by the lifting of the sewage in zeolite reaction tank by pump, combined biological filter is entered into; Fully contact with microbial film wherein, after this procedure, a large amount of pollutents in sewage can be degraded by microorganism adsorption;

(5) sewage in combined biological filter is entered in stripping tower, ammonia nitrogen mainly exists with ammonium ion (NH4+) and free ammonia (NH3) state in waste water, its equilibrium relationship is as follows: this relation of NH3+H2O-NH4++OH-is by the impact of pH value, when pH value height, balance is moved to the left, the ratio of free ammonia increases, during normal temperature, when pH value is about 7, ammonia nitrogen great majority exist with ammonium ion state, and pH is when being about 11, free ammonia roughly accounts for 98%, and free ammonia is easy to overflow from water.

Ammonia-nitrogen stripping tower generally adopts double tower to contact and runs, to improve the recovery concentration of ammonia.And ammonia nitrogen absorption tower is installed after stripping tower, after stripping ammonia nitrogen waste gas is out processed by absorption tower, greatly reduce the ammonia and nitrogen components in sewage.

(6) artificial wet land system is entered into by entering sewage later in stripping tower, artificial swamp is a kind of New Technology about Wastewater Treatment had compared with widespread use, be characterized in that effluent quality is good, there is stronger nitrogen phosphorus processing power, running maintenance is convenient, management simple, investment and working cost low, compare and be suitable for that fund is few, Small Urban that energy shortage and technician lack and rural area.But similar with Efficiency for Soil Aquifer Treatment, traditional Artificial Wetland Techniques also exists that processing efficiency is lower, floor space is excessive, easy blocking causes the shortcomings such as systemic breakdown.But, engage the particular case in China villages and small towns, can by improving artificial swamp structure and filling system, form high-throughput Artificial Wetland Techniques, by itself and other advanced treatment technology optimum combination, as a kind of subsequent disposal technology, so both can overcome artificial wet land system and easily block inherent defect such as floor space large grade, guarantee system is normally run, and can improve effluent quality again, can also beautify the environment simultaneously.

(7) water outlet is purified.

Claims

1. a sewage water treatment method, is characterized in that, is made up of following steps:

First sewage is built-in with the tilting pipeline of multiple tracks barrier by one, makes the large-scale particulate matter in sewage, impurity stopped by barrier;

Sewage is entered in aerobic nitrification pond;

Zeolite reaction tank will be then entered into through aerobic nitrification pond;

By the lifting of the sewage in zeolite reaction tank by pump, enter into combined biological filter; Fully contact with microbial film wherein;

Sewage in combined biological filter is entered in stripping tower;

Artificial wet land system is entered into by entering sewage later in stripping tower;

Purification water outlet.

2. a kind of sewage water treatment method as claimed in claim 1, is characterized in that, the quantity of the barrier described in described step (1) is at least 4 layers, and the passing hole of later layer barrier is all less than front one deck barrier.

3. a kind of sewage water treatment method as claimed in claim 1, is characterized in that, is provided with wooden or plastic slat filler in the stripping tower in described step (5).