CN104692585A - Process for treating urban domestic sewage - Google Patents

Process for treating urban domestic sewage Download PDF

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Publication number
CN104692585A
CN104692585A CN201310660867.5A CN201310660867A CN104692585A CN 104692585 A CN104692585 A CN 104692585A CN 201310660867 A CN201310660867 A CN 201310660867A CN 104692585 A CN104692585 A CN 104692585A
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CN
China
Prior art keywords
sewage
water
tank
treatment
organic matters
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310660867.5A
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Chinese (zh)
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TIANJIN QINGSHUO ENVIRONMENTAL ENGINEERING Co Ltd
Original Assignee
TIANJIN QINGSHUO ENVIRONMENTAL ENGINEERING Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TIANJIN QINGSHUO ENVIRONMENTAL ENGINEERING Co Ltd filed Critical TIANJIN QINGSHUO ENVIRONMENTAL ENGINEERING Co Ltd
Priority to CN201310660867.5A priority Critical patent/CN104692585A/en
Publication of CN104692585A publication Critical patent/CN104692585A/en
Pending legal-status Critical Current

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Abstract

The invention provides a process flow and method for treating urban domestic sewage, belongs to the technical field of environmental protection and reasonable utilization of water resource, and aims to solve the problems that current sewage treatment has high energy consumption and large floor area, cannot be used for effectively removing nitrogen, phosphor, color, heavy metals and insoluble organic matters, and the like. By adopting the technical scheme, sewage is pretreated by grids and a grit chamber, flocculant is added so that phosphor and heavy metals in the sewage and organic matters which exist in colloid and suspension states to enter an anaerobic reactor in a slurry mode, as well as the organic matters in the slurry can be converted into methane by means of anaerobic treatment; by means of subsequent aerobic treatment, organic matters in precipitated supernate can be removed, ammoniacal nitrogen can be converted into nitric nitrogen; anaerobic effluent and aerobic effluent are mixed and subjected to hypoxia treatment for nitrogen removal by denitrification, and are finally subjected to secondary aeration and precipitation to completely remove organic matters out of the sewage, so that the water quality can be purified. The method has the characteristics of energy conservation, high efficiency, good water quality, small floor area, low investment, treatment cost and the like.

Description

A kind of city domestic sewage treatment process
Technical field
The present invention relates to a kind of urban sewage treatment process, particularly a kind of sewage disposal water quality arrive in the treatment process of standards of water quality, belong to urban sewage treatment technical field.
Background technology
Current municipal sewage treatment adopts following technique mostly: existing by sewage by coarse rack to water collecting basin, settling pit is delivered to through promoting, arrive settling tank again, through aeration tank, settling tank, sewage after emission treatment, this process is called second-stage treatment, can promote water before discharging if be for further processing with pump, obtains the water quality for Treated sewage reusing through filter tank, but separately need establish intermediate pool, lift pump room, clean water basin, back flushing pump house, second-stage treatment does not reach middle standards of water quality, if need process further, complex process, investment are greatly, energy consumption is large, cost is high.
Summary of the invention
The object of the invention is to provide a kind of municipal sewage as a resource treatment process, and this technique reduces power consumption, and technical process is reasonable, compact, and sewage water denitrification, dephosphorization effect are remarkable, and water quality reaches middle water quality standard.
For achieving the above object, the present invention by the following technical solutions:
A kind of city sewage resource treating process, it comprises the following steps:
(1) hold well coarse rack removes bulk foreign material;
(2) sewage through removing bulk foreign material enters water collecting basin;
(3) send into fine fack from water collecting basin lifting sewage, remove less foreign material;
(4) sewage removing less foreign material passes through settling pit;
(5) water after desilting sends into hydrolytic tank;
(6) anoxic, aerobic aeration pond are sent in hydrolytic tank water outlet, and hydrolytic tank bottom mud delivers to sludge concentration tank;
(7) water after Air Exposure enters settling tank, and settling tank base sludge delivers to aeration tank and sludge concentration tank;
(8) settling tank water out delivers to filtering basin, and the Water circulation after filtration, counter-flushing liquid delivers to water collecting basin
(9) sludge concentration tank mud is out through dehydration outward transport, and the water deviate from delivers to water collecting basin.
It is COD200-600 mg/litre that treatment process provided by the invention can process raw waste water water quality, BOD80-300 mg/litre, SS50-300 mg/litre, NH 3-N20-60 mg/litre.
Concrete advantage
1, this technique adopts fine fack, hydrolytic tank makes the pollutent of 50% remove under micro-energy consumption, whole process is a lifting sewage only, utilize internal circulation pump power in aeration tank to do oxygen-starved area and stir oxygenation power, thus energy efficient, whole production process 1 square metre of sewage power consumption 0.2-0.35 kilowatt-hour, hydrolytic tank adopts pipeline evenly to intake, formed and can save sewage disposal power 40% based on the Sludge Bed hydrolyzing process itself being hydrolyzed bacterium, this technique needs the sludge quantity of dehydration to be only the general of common process, thus save workload and the chemical feeding quantity of sludge dewatering, the total expenses processing every cubic metre of sewage is 0.2-0.4 unit (not comprising depreciation of equipment).
Filtering basin utilize and are filtered water as backwashing water, thus need not arrange intermediate pool, pumping plant, clean water basin, backwashing pump.
2, this technique passes through the process of hydrolytic tank and oxygen-starved area, sewage dephosphorization, and deoxidation effect is remarkable, and 40% of empty general technology deoxidation brings up to 80%, and dephosphorization effect brings up to 50-60% from 30%.By present treatment technique, effluent quality reaches and is even better than water water quality standard in this city.
3, this technological design is reasonable, reduce capital cost, (enclosure wall is comprised) within sewage work's enclosure wall, in treatment plant's 2 ten thousand steres/day above scale, process about needs 500-600 unit's capital cost (not comprising fees paid for taking rural land) rice cubic meter/day, the sewage of process 2 cubic metres of/day sewage takes up an area needs 0.7-0.8 cubic meter, and general urban sewage treatment process only reaches national grade one discharge standard, processes 1 cubic metre of/day investment and needs 800-1000 unit.

Claims (5)

1. a city sewage resource treating process, is characterized in that it comprises the following steps:
(1) hold well coarse rack removes bulk foreign material;
(2) sewage through removing bulk foreign material enters water collecting basin;
(3) send into fine fack from water collecting basin lifting sewage, remove less foreign material;
(4) sewage removing less foreign material passes through settling pit;
(5) water after desilting sends into hydrolytic tank;
(6) anoxic, aerobic aeration pond are sent in hydrolytic tank water outlet, and hydrolytic tank bottom mud delivers to sludge concentration tank;
(7) water after Air Exposure enters settling tank, and settling tank base sludge delivers to aeration tank and sludge concentration tank;
(8) settling tank water out delivers to filtering basin, and the Water circulation after filtration, counter-flushing liquid delivers to water collecting basin
(9) sludge concentration tank mud is out through dehydration outward transport, and the water deviate from delivers to water collecting basin.
2. city sewage resource treating process according to claim 1, is characterized in that the described hydrolytic tank effluent flow rate that enters controls at 1-2 m/h, residence time 2-4 hour.
3. city sewage resource treating process according to claim 1 and 2, is characterized in that described sewage first through the oxygen-starved area of aeration tank, and its residence time is 1-1.5 hour; Enter aerobic zone by the sewage of oxygen-starved area, its residence time is 4-8 hour, and air water volume ratio is between 1:2-1:4 wherein.
4. city sewage resource treating process according to claim 1 and 2, is characterized in that the flow velocity that described filtering basin sewage passes through is 3-4 m/h.
5. city sewage resource treating process according to claim 3, is characterized in that the flow velocity that described filtering basin sewage passes through is 3-4 m/h.
CN201310660867.5A 2013-12-06 2013-12-06 Process for treating urban domestic sewage Pending CN104692585A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310660867.5A CN104692585A (en) 2013-12-06 2013-12-06 Process for treating urban domestic sewage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310660867.5A CN104692585A (en) 2013-12-06 2013-12-06 Process for treating urban domestic sewage

Publications (1)

Publication Number Publication Date
CN104692585A true CN104692585A (en) 2015-06-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310660867.5A Pending CN104692585A (en) 2013-12-06 2013-12-06 Process for treating urban domestic sewage

Country Status (1)

Country Link
CN (1) CN104692585A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105417777A (en) * 2015-12-01 2016-03-23 大连爱安沃特环境技术有限公司 Sewage coagulation and adsorption sedimentation separation-separator anaerobic bio-gas regeneration treatment method
CN106007241A (en) * 2016-07-21 2016-10-12 罗志明 Novel urban pipeline sewage treatment method
CN107673493A (en) * 2017-11-03 2018-02-09 蚌埠市兄弟粮油食品科技有限公司 A kind of multi-ladder hierarchical ground water purification treatment system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105417777A (en) * 2015-12-01 2016-03-23 大连爱安沃特环境技术有限公司 Sewage coagulation and adsorption sedimentation separation-separator anaerobic bio-gas regeneration treatment method
CN105417777B (en) * 2015-12-01 2018-03-16 大连爱安沃特环境技术有限公司 Sewage Coagulation and Adsorption precipitates separation-isolate anaerobic methane regeneration treating method
CN106007241A (en) * 2016-07-21 2016-10-12 罗志明 Novel urban pipeline sewage treatment method
CN107673493A (en) * 2017-11-03 2018-02-09 蚌埠市兄弟粮油食品科技有限公司 A kind of multi-ladder hierarchical ground water purification treatment system

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Application publication date: 20150610