Starting method of SNAD process for treating biogas slurry of pig farm

A pig farm and biogas slurry technology, which is applied in the direction of biological treatment adjustment method, biological treatment device, water treatment parameter control, etc., can solve the problem of less application, and achieve the effect of saving manpower and capital costs, and saving chemical costs

Inactive Publication Date: 2017-12-08
CHENGDU UNIV OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an emerging process, the SNAD process is currently mostly focused on the simulation of water distribution in the laboratory and the start-up of the sequence batch reaction device. The application of the start-up of the SNAD process in actual engineering is still very small

Method used

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  • Starting method of SNAD process for treating biogas slurry of pig farm
  • Starting method of SNAD process for treating biogas slurry of pig farm
  • Starting method of SNAD process for treating biogas slurry of pig farm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] One, a kind of start-up method of processing pig farm biogas slurry SNAD process, comprises the following steps:

[0046] (1) Construct a joint-type continuous flow reaction device:

[0047] The combined continuous flow reaction device includes a tank body 3 and an aeration device 4 .

[0048] A partition 301 is arranged inside the tank body 3, and the partition board 301 divides the tank body 3 into a reaction zone 302 and a precipitation zone 303, and the lower parts of the reaction zone 302 and the precipitation zone 303 communicate.

[0049] The upper part of the reaction zone 302 is provided with a water inlet pipe 5 for pig farm biogas slurry to enter, and the upper part of the precipitation zone 303 is provided with an outlet pipe 7; the bottom of the reaction zone 302 and the precipitation zone 303 are inoculated with sludge, and The height of the sludge is higher than the bottom edge of the dividing plate 301; the aeration device 4 includes an aeration pump 40...

Embodiment 2

[0069] One, a kind of start-up method of processing pig farm biogas slurry SNAD process, comprises the following steps:

[0070] (1) Construct a combined continuous flow reaction device (with starting Example 1);

[0071] (2) Construction of sludge-biofilm composite integrated denitrification process:

[0072] Mixing anammox sludge and nitrification sludge with a volume ratio of 5:5 is the inoculation sludge 9; adding inoculation sludge 9 to the co-built continuous flow reaction device in step (1), the inoculation sludge The inoculum amount of mud 9 is 1 / 3 of the effective volume in the reaction zone 302 of the tank body 3, and PVC polyester filler 10 is added at the same time, and the filling rate of the PVC polyester filler 10 is 60%;

[0073] (3) Startup: Control dissolved oxygen DO at 0.2-0.6mg·L -1 , the hydraulic retention time is controlled at 0.6-1.5d, the temperature is at 26-32°C, the pH of the pig farm biogas slurry influent is 7.5-8.2, and the ammonia nitrogen co...

Embodiment 3

[0084] One, a kind of start-up method of processing pig farm biogas slurry SNAD process, comprises the following steps:

[0085] (1) Construct a combined continuous flow reaction device (with starting Example 1);

[0086] (2) Construction of sludge-biofilm composite integrated denitrification process:

[0087] Mix the anammox sludge and nitrification sludge with a volume ratio of 9:1 to be the inoculation sludge 9; add the inoculation sludge 9 to the co-built continuous flow reaction device in step (1), and the inoculation sludge The inoculum amount of mud 9 is 1 / 5 of the effective volume in the reaction zone 302 of the tank body 3, and PVC polyester filler 10 is added at the same time, and the filling rate of the PVC polyester filler 10 is 30%;

[0088] (3) Startup: Control dissolved oxygen DO at 0.2-0.6mg·L -1 , the hydraulic retention time is controlled at 0.6-1.5d, the temperature is at 26-32°C, the pH of the pig farm biogas slurry influent is 7.5-8.2, and the ammonia ni...

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Abstract

The invention relates to a starting method of an SNAD process for treating biogas slurry of a pig farm. The starting method comprises the following steps: (1) constructing a combined continuous reaction device; (2) constructing a sludge-biofilm method integrated denitrification process: adding inoculated sludge into the combined continuous reaction device constructed in the step (1), and simultaneously adding a PVC polyester filler; and (3) starting: controlling dissolved oxygen DO to 0.2mg.L<1>-0.6mg.L<1>, controlling the hydraulic retention time to 0.6d-1.5d, controlling the temperature to 26-32 DEG C, controlling the pH value of inflow of the biogas slurry of the pig farm to 7.5-8.2, and controlling the ammonia nitrogen concentration inflow of the biogas slurry of the pig farm to 245mg.L<1>-455mg.L<1>, and starting the SNAD process when the ammonia nitrogen concentration of the inflow of the biogas slurry of the pig farm is increased step by step. The starting method of the SNAD process for treating the biogas slurry of the pig farm has the advantages of low energy consumption and cost and high TN removal rate.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a start-up method for processing pig farm biogas slurry SNAD process. Background technique [0002] Due to the increasing consumption of meat products year by year, the livestock and poultry breeding industry has developed rapidly, especially the pig breeding industry has now become an important industry related to people's livelihood, but it also brings huge volumes of manure and pig farm flushing wastewater. Wastewater discharged from pig farms contains high concentrations of chemical oxygen demand (COD) and total nitrogen (TN), the concentrations of which are 5000-8000mg L -1 and 300-600mg·L -1 about. These high COD, high ammonia nitrogen (NH 4 +-N) Organic wastewater has seriously polluted surface water and groundwater, and the eutrophication of the water body is serious, and a large number of microorganisms such as parasites contained in it will pollute the reference water sou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F103/20
CPCC02F3/006C02F3/301C02F3/302C02F2103/20C02F2203/006C02F2209/22
Inventor 信欣鲁航王子凌管蕾言宗骋
Owner CHENGDU UNIV OF INFORMATION TECH
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