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Kitchen waste water treatment method and treatment device thereof

A wastewater treatment and kitchen waste technology, applied in water/sewage treatment, biological water/sewage treatment, neutralized water/sewage treatment, etc., can solve problems such as low degree of automation, polluted environment, and high organic matter

Pending Publication Date: 2021-07-23
武汉天源环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the promotion and popularization of garbage sorting, kitchen waste transfer stations are increasingly emerging. Kitchen waste water is waste water produced by mechanically compressing kitchen waste. This type of waste water has high organic matter, fast acidification, high suspended matter, and oily substances. If it is discharged without treatment, it will affect the surrounding water bodies and pollute the environment.
[0004] However, most of the existing kitchen waste wastewater treatment equipment is only used to physically filter out food residues or simply treat kitchen waste wastewater through the adsorption of adsorption materials, without meticulously treating the complex components of kitchen waste wastewater
Kitchen waste wastewater tends to be slightly acidic, and the content of suspended solids and oil in the water will be relatively high. The general method is to adjust by adding flocculants (PAC and PAM), but the best pH adjustment for flocculation and sedimentation is 6-8, while wastewater The pH of the stock solution is generally 3. If PAC and PAM are added directly, the flocculant will be hydrolyzed quickly, and the effect is not obvious.
Moreover, the existing treatment equipment generally adopts dead-end filtration (i.e. full filtration) as the filtration method. This method is to trap particles larger than the membrane pores in the wastewater on the filter membrane, so periodic cleaning or replacement of the filter membrane is required. Practical application inconvenient
In addition, there are more detailed kitchen waste wastewater treatment equipment on the market, but these equipment are mostly distributed equipment, and equipment installation requires a large space, and the automation degree of decentralized equipment is not high, so it cannot be better Improve wastewater treatment efficiency

Method used

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  • Kitchen waste water treatment method and treatment device thereof
  • Kitchen waste water treatment method and treatment device thereof
  • Kitchen waste water treatment method and treatment device thereof

Examples

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Effect test

Embodiment 1

[0060] Such as Figure 1-Figure 2 As shown, a kitchen waste wastewater treatment device includes an anaerobic dephosphorization unit 1, a new high-efficiency energy-saving biochemical unit 2, a built-in dynamic membrane unit 3 and a sludge dehydration device 4, and the first output end of the anaerobic dephosphorization unit 1 is connected to the The input end of the new high-efficiency energy-saving biochemical unit 2 is connected, the second output end is connected with the sludge dewatering device 4, the new high-efficiency energy-saving biochemical unit 2 is connected with the built-in dynamic membrane unit 3, and the first of the built-in dynamic membrane unit 3 The output end is connected with the new high-efficiency energy-saving biochemical unit 2, and the second output end is connected with the sludge dewatering device 4; the anaerobic phosphorus removal unit 1 includes a pretreatment integrated device 1100 connected in sequence, a composite anaerobic Reaction tank 12...

Embodiment 2

[0070] A method for treating kitchen waste wastewater, comprising the following steps:

[0071] Add calcium oxide, sodium hydroxide, PAC, and PAM to the waste water through the pretreatment integrated device 1100 for pretreatment to obtain the supernatant, and discharge part of the sediment into the sludge dewatering device 4; the dosage of calcium oxide 5kg / t, the dosage of sodium hydroxide is 2kg / t, the dosage of PAC is 2kg / t, the dosage of PAM is 0.02kg / t, the residence time of wastewater in the pretreatment reaction zone 1110 5min, and the time of staying in the pretreatment sedimentation zone 1120 and the pretreatment water production zone 1130 is 60min respectively;

[0072] The supernatant of the above steps is anaerobically treated through the compound anaerobic tank 1200 to obtain the degraded clear liquid, and part of the sediment is discharged into the sludge dewatering device 4; wherein the residence time of the wastewater in the compound anaerobic reaction tank is...

Embodiment 3

[0078] A method for treating kitchen waste wastewater, comprising the following steps:

[0079] Add calcium oxide, sodium hydroxide, PAC, and PAM to the waste water through the pretreatment integrated device 1100 for pretreatment to obtain the supernatant, and discharge part of the sediment into the sludge dewatering device 4; the dosage of calcium oxide is 3.5kg / t, the dosage of sodium hydroxide is 1.5kg / t, the dosage of PAC is 1kg / t, the dosage of PAM is 0.01kg / t, the residence time of wastewater in the pretreatment reaction zone 1110 4min, the time of staying in the pretreatment sedimentation zone 1120 and the pretreatment water production zone 1130 is 45min respectively;

[0080] The supernatant of the above steps is anaerobically treated through the compound anaerobic tank 1200 to obtain the degraded clear liquid, and part of the sediment is discharged into the sludge dewatering device 4; wherein the residence time of the waste water in the compound anaerobic reaction tan...

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Abstract

The invention relates to a kitchen waste water treatment method and a treatment device thereof. The kitchen waste water treatment method comprises the steps that firstly, waste water is pretreated through a pretreatment integrated device to obtain supernate, secondly, the supernate is treated through a composite anaerobic tank to obtain degraded clear liquid, then the degraded clear liquid is subjected to phosphorus removal treatment through a phosphorus removal reactor to obtain phosphorus removal clear liquid, the dephosphorized clear liquid is treated in a denitrification-carbonization-nitrification-short-cut nitrification-denitrification mode in sequence, a mud-water mixture is obtained, and then the mud-water mixture is subjected to mud-water separation through a built-in dynamic membrane unit. The device is integrated equipment, the equipment is small in installation occupied area, high-automation treatment of the equipment is achieved, and the wastewater treatment efficiency and effect are better improved. According to the method, the medicament treatment cost can be reduced, the flocculent precipitation effect is enhanced, automatic chain feeding is realized, the automation degree of equipment is improved, and accurate adjustment is realized. By adopting a two-stage ammonia nitrogen removal process, the consumption can be better reduced, and the ammonia nitrogen removal efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a kitchen waste wastewater treatment method and a treatment device thereof. Background technique [0002] Kitchen waste is a kind of common waste in our daily life. Many restaurants throw it away directly or collect it by sanitation workers and then fill it in a landfill. In fact, kitchen waste has other functions, which can be Used to extract asphalt, biodiesel, bio-fertilizer, etc.; if the kitchen waste is recycled and reused separately, the kitchen waste needs to be pretreated, that is, the kitchen waste is dehydrated and the food residue is filtered out, but it will also produce kitchen waste waste water. [0003] With the promotion and popularization of garbage sorting, kitchen waste transfer stations are increasingly emerging. Kitchen waste water is waste water produced by mechanically compressing kitchen waste. This type of waste water has high organic matter...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/16C02F103/06
CPCC02F1/40C02F1/44C02F1/5236C02F1/56C02F1/66C02F3/302C02F9/00C02F2001/007C02F2101/16C02F2103/06
Inventor 黄开明冷超群吴璨陈俊李红李进
Owner 武汉天源环保股份有限公司
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