Method for producing dissoluble carbon source needed by waste water denitrification from kitchen waste

A technology for kitchen waste and production wastewater, which is applied in the field of waste resource utilization and advanced wastewater treatment, can solve the problems of high nitrogen and phosphorus content in sludge, restrict further utilization, etc., achieve high dissolved carbon source concentration, reduce a large amount of pollution the effect of entering

Active Publication Date: 2015-02-04
HEFEI UNIV OF TECH
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Problems solved by technology

At home and abroad, the use of residual sludge fermentation as a carbon source for denitrification has been studied, but the nitrogen and phosphorus content in the sludge is high, which limits its further utilization.

Method used

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  • Method for producing dissoluble carbon source needed by waste water denitrification from kitchen waste
  • Method for producing dissoluble carbon source needed by waste water denitrification from kitchen waste
  • Method for producing dissoluble carbon source needed by waste water denitrification from kitchen waste

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Embodiment 1

[0023] In this embodiment, the method for producing waste water denitrification soluble carbon source using kitchen waste includes the unit processes of vortex gravity separation, pretreatment and anaerobic fermentation:

[0024] 1. Vortex gravity separation

[0025] Take 10 kg of solid food waste from a university cafeteria in Hefei, mix the solid food waste with water at a mass ratio of 1:5, and pass through a sieve with an aperture of 7 mm to remove plastic products, paper towels, bones, and large pieces of meat , disposable chopsticks and other sundries to obtain a mixture of kitchen waste; add the mixture of kitchen waste to a rotary kitchen waste component separator for vortex gravity separation, control the speed at 70-100 rpm, remove the upper floating As well as small bones and other heavy objects that sink to the bottom, the mixed sediment is collected from under the side of the separator, and the main component of the mixed sediment is carbohydrates.

[0026] 2. Pr...

Embodiment 2

[0032] Embodiment 2: Utilize the dissolved carbon source of the present invention to treat waste water containing nitrate nitrogen

[0033] Inoculate the SBR reactor of 4L, according to shown in table 1, add potassium nitrate as nitrate (25mg / L nitrate radical), and add the mixed carbon source (10g / L) of acetic acid and n-butyric acid and the present invention's soluble carbon source respectively (10g / L), the denitrification reaction is carried out under the condition of micro-aerobic or anoxic (dissolved oxygen is less than 0.1mg / L). During the denitrification process, samples were taken at 0min, 5min, 10min, 15min, 20min, 25min, 30min, 35min, 40min, 45min, 50min, 55min, 60min, 70min, 80min, 90min, 100min, 110min, 120min, etc. 8 mL each time, immediately centrifuged with a desktop high-speed centrifuge at a speed of 10,000 rpm, centrifuged for 10 min, and filtered the supernatant after centrifugation, and analyzed the concentration changes of nitrate nitrogen and ammonia nitr...

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Abstract

The invention discloses a method for producing a dissoluble carbon source needed by waste water denitrification from kitchen waste. The method takes the kitchen waste as a substrate and utilizes vortex gravity separation, screening and fermentation control technologies to produce the dissoluble carbon source needed by waste water denitrification. The dissoluble carbon source produced by the method has the properties that the concentration of volatile fatty acid reaches 20-30g / L, the concentration of ammonia nitrogen is less than 150mg / L and the concentration of soluble phosphorus is less than 50mg / L, and the dissoluble carbon source can be fed into effluent of a sewage plant in a ratio of one over two hundred to one over three hundred for use; after advanced treatment, the effluent has the properties that the total nitrogen content is less than 15mg / L and the ammonia nitrogen content is less than 5mg / L, thus reaching the first class A standard of sewage discharge in China.

Description

1. Technical field [0001] The invention relates to a method for recycling and reusing kitchen waste, in particular to a method for producing waste water denitrification soluble carbon source by using kitchen waste, and belongs to the technical field of resource utilization of waste and advanced treatment of waste water. 2. Background technology [0002] Many rivers, lakes, reservoirs and groundwater in China are seriously polluted, resulting in resource-related water shortages and water-quality water shortages superimposed on each other, resulting in a serious shortage of water resources in China. According to the investigation of the pollution status of 532 rivers in China, 436 rivers have been polluted to varying degrees, accounting for 82% of the total number of investigations. According to the 43rd issue of the Water Quality Automatic Monitoring Weekly Report of the Ministry of Environmental Protection in 2014, among the 141 key sections of major rivers in the country, 2...

Claims

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Application Information

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IPC IPC(8): B09B3/00C02F3/28
Inventor 胡真虎戚莎莎李袁守军王伟
Owner HEFEI UNIV OF TECH
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