CN102616994A

CN102616994A - Sludge-first and then-water sewage (wastewater) quick treatment process

Info

Publication number: CN102616994A
Application number: CN2012100902957A
Authority: CN
Inventors: 符福煜; 张胜
Original assignee: Shanghai Odorfreen Environmental Engineering Co Ltd
Current assignee: Shanghai Odorfreen Environmental Engineering Co Ltd
Priority date: 2012-03-30
Filing date: 2012-03-30
Publication date: 2012-08-01

Abstract

The invention discloses a sludge-first and then-water sewage (wastewater) quick treatment process. The process is characterized by comprising the following steps of: a) lifting raw sewage to an FAP flash high-efficiency solid-liquid separation system, quickly reacting with fed compound chemicals, and allowing separation substance to enter a sludge dewatering system; b) allowing clear liquid gravity to enter an ADF-NSF front denitrification biological filter (DBF), and denitrifying by using an NSF front denitrification filter; c) lifting the sewage which is denitrified by the NSF front denitrification filter into a biological aerated filter (BAF), oxidizing organic matter and performing ammonia-nitrogen nitrification; and d) refluxing part of sewage which is subjected to BAF treatment to the NSF, and performing biological denitrification, and allowing the rest gravity to enter a DBF deep bed sand filter tank and filtering. The sludge-first and then-water sewage (wastewater) quick treatment process has the advantages that the sewage is quickly treated, and high-quality water can be discharged efficiently by an FAP flash high-efficiency solid-liquid separation technology, the NSF front denitrification biological filter, a BAF high-load biological aerated filter and a DBF deep bed sand filter tank filter technology, and a large amount of land is saved simultaneously.

Description

Dirty (giving up) water fast treating process of water behind elder generation's mud

[technical field]

The present invention relates to dirty waste water treatment process, relate in particular to dirty (giving up) water fast treating process of water behind a kind of first mud.

[background technology]

Along with the fast development of China's rural and urban industryization, the trade effluent content in the municipal wastewater is increasingly high, and the trade effluent content of the sewage work of a lot of Industry Development Areas or economic garden surpasses 80%; The B/C ratio is lower than 0.2, the biodegradability extreme difference of sewage, and the difficulty of WWT is increasing; Treatment scheme is more and more longer; Structures take up an area of increasing, and processing cost is increasingly high, but water outlet still can't meet the emission standard of national compulsory.The traditional active sludge treatment process can't satisfy current municipal wastewater fully and handle strict day by day emission request; Many sewage works just are constructed and put into operation; Because treat effluent can't reach emission standard, will face the difficult situation of transformation, cause great investment waste; Water surrounding is destroyed, and local governments at all levels are to developing the economy and protecting the pressure of environment to increasingly sharpen.

Municipal effluent conventional treatment process flow process is that the thickness grid is removed particle foreign material+preliminary sedimentation tank+activated sludge biochemical reaction tank+second pond or final deposition pool+filter tank (or discharging)+sludge dewatering treatment basically both at home and abroad at present; Floor space is big; Treatment time is long, and energy consumption is high, and effluent quality is poor.Especially the city municipal wastewater of China is actually comprehensive trade effluent; The ratio of sewage is lower than 10%, and the city municipal wastewater of the industrial developed regions that have almost all is a trade effluent, and blowdown enterprise has; Hundreds of different trade effluents such as fine chemistry industry, dyeing and finishing, metal processing, papermaking, leather, pigment, silicon product, petrochemical complex; Intractability is very big, though most of sewage work has increased the anaerobic hydrolysis-acidification treatment process in preceding road, aerobic biochemical pond, and the complicated technical process of employing AAOO that biochemical part adopts AAO even has; But because influent quality is complicated; The interference of toxic substance, factors such as organic loading and hydraulic load impact, few in number to the sewage work of water outlet ability stably reaching standard discharging.And processing technological flow is long; The WWT time needs tens hours, and floor space is big, and sewage work's operating requirement is high; Complicated operation; Effluent quality is poor, many can't the assurance of water outlet of the water outlet of many treatment plants even the one-level B of company, and tail water that can't be normally up to standard is very serious to water environmental impact.

[summary of the invention]

The present invention is in order to solve above-mentioned deficiency; Dirty (giving up) water fast treating process of water behind a kind of first mud is provided; Employing is carried out quick mud-water separation earlier with sewage, and then the inversion sewage treatment process of treating water, and is opposite with the technical process of the first treating water aftertreatment of common process mud.Water technology of the present invention adopts materialization+fixed bed fixed biologically membrane technique, handles all kinds of municipal wastewaters and trade effluent, and sewage solid-liquid separation speed is fast; Biochemical efficiency is high, and hydraulic detention time is short, saves a large amount of land areas; Processing cost is low, safeguards low, simple to operation; Stable, water outlet can be satisfied the strictest discharging and reuse requirement.

Above-mentioned purpose of the present invention realizes through following technical scheme: dirty (giving up) water fast treating process of water behind a kind of first mud, it is characterized in that, and may further comprise the steps:

A. raw waste water gets into the efficient solid-liquid separation system of FAP " sudden strain of a muscle gathers " after promoting, warp and the compound rapid reaction that adds, and isolate gets into sludge dewatering system;

B. clear liquid gravity gets into ADF-NSF pre-denitrification and denitrogenation biological filter, the denitrogenation processing through NSF Prepositive denitrification filter tank;

C. the sewage of denitrogenation processing carries out oxidation operation and ammonia nitrogen nitration treatment through promoting entering BAF BAF through NSF Prepositive denitrification filter tank;

D. the sewage of handling through BAF is partly refluxed to the NSF pond and carries out biological denitrificaion, and all the other gravity get into the dark bed of DBF sand filter and filter.

Clear water after aforementioned sewage treatment process filters can reach GB18918-2002 one-level A standard and discharges or reuse through disinfecting.

The invention has the beneficial effects as follows: dirty (giving up) water fast treating process of water adopts the efficient preposition denitrogenation biological filter of solid-liquid separation technique+NSF of FAP " sudden strain of a muscle the gathers "+dark bed of BAF high loading BAF+DBF sand filtration filtering technique to realize quick, efficient, the high-quality water outlet of WWT, save a large amount of soils simultaneously behind the first mud.FAP " sudden strain of a muscle gathers " the quick solid-liquid separation technique that efficiently drifts along can effectively be removed the solids of non-solubility; Dissolving and non-dissolved midbody-colloid thing, macromolecular organic pollutant, in the sewage the pollutent of part hard to manage remove earlier; Reduced back segment biochemical treatment difficulty; The biochemical biomembrance process AO technology that adopts adopts dark bed sand filter to filter at last, makes stable water outlet reach the emission standard of GB18918-2002 one-level A.Adopt the efficient solid-liquid separation technique of FAP " sudden strain of a muscle gathers " to improve biochemical processing efficiency and the water outlet quality of back segment; Shortened the hydraulic detention time of WWT; Thereby reduced the running cost of WWT; The entire sewage processing whole process residence time is no more than 4 hours, and stable effluent quality is superior to GB18918-2002 one-level A standard.Gather pretreated mud and need not to add any medicament and can directly dewater through dodging, the mud solid content reaches more than 30%.

[description of drawings]

Fig. 1 is a process flow sheet of the present invention.

[embodiment]

Below in conjunction with accompanying drawing the present invention is further detailed:

As shown in Figure 1, dirty (giving up) water fast treating process of water is characterized in that behind a kind of first mud, may further comprise the steps:

Wherein, " sudden strain of a muscle gathers ", efficient solid-liquid separation technique adopted special compound, impelled the linear chain of polymeric flocculant fully to stretch; It contacts with colloidal solid with suspended particle in the water fully to show its reactive group, reaches moment suspended substance and seed lac body thing are condensed together, and can destroy the mud cell envelope; Make the inside and outside osmotic pressure overbalance of mud cell walls; Change the containing character of itself and water molecules, reduce its hydration effect, form very high compression ratio; The solid-liquid sharp separation, the mud solid content can reach more than 10%.Accomplish in 5 minutes entire reaction time, can remove suspended substance and colloid thing more than 85%, remove the CODcr more than 60%." sudden strain of a muscle gathers " processing speed is fast, and efficient is high, alternative anaerobic hydrolysis-acidification in full force and effect pond.

Wherein, The preposition denitrogenation biological filter of ADF-NSF adopts upwelling fixed bed fixed biologically membrane technique, and the bio-film colonization medium adopts pebbles and volcanics particle, and it is biological in the NSF reactor drum, to cultivate amphimicrobian heterotroph denitrification; Through backflow to the aerobic biofilter nitrification liquid; Denitrifying bacterium utilizes the carbon source in the former water to obtain energy, utilizes the oxygen in nitric nitrogen and the nitrite nitrogen ion to breathe, and nitrate nitrogen is reduced into N ²Discharge into the atmosphere, reach the purpose of sewage water denitrification, hydraulic detention time is about 30 minutes.

Wherein, The ADF-BAF BAF adopts fixed bed fixed biologically membrane technique; Filter bed adopts compound filler volcanics particle and high ball-type degree natural silica Sand; The BAF BAF integrates the multifunctional bio membrane technique of aerobic fixed biofilm, dark bed sand filtration technology and activated sludge process, and gas, liquid adopts up-flow, reverse filtered model in the same way.Bed body opening crack size is " ∧ " Gradient distribution.Reverse V-shaped biological filter helps improving biological concentration, increases to receive dirt and retaining power.The BAF BAF is once accomplished oxidation of coal, nitrated and filtration removal part suspended substance, hydraulic detention time 150 minutes in same reactor drum.

Wherein, DBF " V " moldeed depth bed sand filter is that the compound bed of run by gravity becomes the water level filtering technique, and the bed body utilizes the sandwich layering theory of sandwich; Every metafiltration material adopts the coarse grain homogeneous silica sand of different-grain diameter, and filter tank medium pore size is the hourglass Gradient distribution along the filter bed longitudinal section, makes suspended substance can see through the filtrate top layer; Pass the middle level and get into the deep layer filtrate, increase the retaining power in filter tank, reduce head loss; Transverse section medium porosity is high and be evenly distributed, and has increased the water environment capacity in filter tank.Hydraulic detention time 18 minutes.

After sewage is handled through dirty (giving up) water fast treating process of water behind the first mud of the present invention; Water outlet COD is stable to be lower than 50mg/l, and BOD5 is stable to be lower than 5mg/l, and NH4-N is stable to be lower than 1mg/l; Total nitrogen is stable to be lower than 10mg/l; Total phosphorus stabilizer is lower than 0.3mg/l, and SS is stable to be lower than 3mg/l, and stable effluent quality is superior to GB18918-2002 one-level A standard.

Dirty (giving up) water fast treating process of water can be saved the soil more than 2 times than conventional treatment process behind the first mud of the present invention, saves 30% running cost, saves the initial cost more than 40%.

Then the present technique scheme implementation finishes.

Claims

1. dirty (giving up) water fast treating process of water behind the first mud is characterized in that, may further comprise the steps:

D. the sewage of handling through BAF is partly refluxed to the NSF pond and carries out biological denitrificaion, and all the other gravity get into the DBF deep-bed filter and filter.