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Solid-phase denitrification carbon source prepared from kitchen waste and preparation method of solid-phase denitrification carbon source

A technology of food waste and nitrifying carbon sources, which is applied in the direction of chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve the problems of high cost, difficult control of dosage, complicated operation, etc. Easy to operate and realize the effect of simple production process

Active Publication Date: 2022-07-29
RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used liquid carbon sources such as methanol, ethanol, and acetic acid have problems such as difficult dosage control, high cost, and complicated operation during operation.

Method used

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  • Solid-phase denitrification carbon source prepared from kitchen waste and preparation method of solid-phase denitrification carbon source
  • Solid-phase denitrification carbon source prepared from kitchen waste and preparation method of solid-phase denitrification carbon source
  • Solid-phase denitrification carbon source prepared from kitchen waste and preparation method of solid-phase denitrification carbon source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Collect kitchen waste, sort and remove impurities that cannot be biodegraded, such as glass, metal, plastic, ceramics, etc., weigh 5kg;

[0038] (2) According to mass: volume (w / v) 1:2, add hot water at 80°C to the kitchen waste, filter through a 30-mesh sieve, and repeat twice to collect the filter residue;

[0039] (3) place the filtered residue on a centrifuge for centrifugation, under the condition of 3000r / min, centrifuge for 10min, collect the solid after the centrifugation, collect the residue in the filtrate and the centrifuge, and carry out oil-water separation to recover grease;

[0040] (4) The solid matter after centrifugation, as well as the collected crude filtrate and the residue in the centrifugation solution, are evenly spread on a freeze-drying tray with a thickness of 2cm, and placed in a freezer at -5°C for pre-heating. Freeze for 3h to form a solid;

[0041] (5) Put the pre-frozen solid into a vacuum freeze-drying machine for freeze-drying, the...

Embodiment 2

[0044] (1) Collect kitchen waste, sort and remove impurities that cannot be biodegraded, such as glass, metal, plastic, ceramics, etc., weigh 10kg;

[0045] (2) According to mass: volume (w / v) 1:2, add hot water at 90°C to the kitchen waste, filter through a 20-mesh sieve, and repeat 3 times to collect the filter residue;

[0046] (3) place the filtered residue on the centrifuge and centrifuge, under the condition of 5000r / min, centrifuge for 30min, collect the solid after centrifugation, carry out oil-water separation after collecting the residue in the filtrate and the centrifugation liquid, and recover grease;

[0047](4) The solid matter after centrifugation, as well as the collected crude filtrate and the residue in the centrifugation solution, are evenly spread on a freeze-drying tray with a thickness of 5cm, and placed in a freezer at -10°C for preconditioning. Freeze for 5h to form a solid;

[0048] (5) Put the pre-frozen solid into a vacuum freeze-drying machine for ...

Embodiment 3

[0051] (1) Collect kitchen waste, sort and remove impurities that cannot be biodegraded, such as glass, metal, plastic, ceramics, etc., weigh 10kg;

[0052] (2) According to mass: volume (w / v) 1:3, add hot water at 85°C to the kitchen waste, filter through a 10-mesh sieve, and repeat 3 times to collect the filter residue;

[0053] (3) Place the filtered kitchen waste on a centrifuge, centrifuge for 25 minutes at 4500 r / min, collect the centrifuged solids, collect the filtrate and the residue in the centrifuged liquid, and carry out oil-water separation to recover grease ;

[0054] (4) The kitchen waste after centrifugation, as well as the collected coarse filtrate and the residue in the centrifuged liquid, are evenly spread on a freeze-drying tray with a certain thickness of 10cm, and placed in a freezer at -15°C , pre-freeze for 2h;

[0055] (5) Put the pre-frozen kitchen waste into a vacuum freeze-drying machine for freeze-drying, the freeze-drying machine cold trap temper...

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Abstract

The invention discloses a solid-phase denitrification carbon source prepared from kitchen waste and a preparation method of the solid-phase denitrification carbon source, the kitchen waste is used as a matrix material, after the kitchen waste is sorted to remove impurities, solid-liquid separation is carried out, grease is recovered from a liquid phase part, residues and solid matters separated from the solid phase are combined and treated, the solid matters are pre-frozen, and after the pre-freezing is finished, the solid-phase denitrification carbon source prepared from the kitchen waste is obtained. The method comprises the following steps: performing vacuum freeze-drying treatment on food waste, and after freeze-drying is finished, crushing a freeze-dried solid matter to obtain a solid-phase denitrification carbon source which can be directly used as a carbon source and a carrier material for denitrification nitrogen removal, so that biological nitrogen removal is enhanced, and efficient resource utilization of the food waste is realized. The preparation process is simple, the production cost is low, a low-cost denitrification carbon source is provided for nitrogen and phosphorus removal of low-carbon-nitrogen-ratio wastewater, the biological nitrogen removal effect is enhanced, and an effective way is provided for harmless treatment and resource utilization of kitchen waste.

Description

technical field [0001] The invention belongs to the technical field of harmless treatment and resource utilization of solid waste, and relates to a solid phase nitrifying carbon source prepared by using kitchen waste and a preparation method thereof. Background technique [0002] Food waste is a general term for food waste and kitchen waste. Food waste includes food residues from restaurants, restaurants, and unit canteens, as well as processing waste from back kitchens. Kitchen waste refers to fruits and vegetables discarded in daily life. And food scraps, leftovers, melon and fruit peels and other perishable organic waste. Perishable, organic-containing domestic waste, including household kitchen waste, kitchen waste and other kitchen waste, are kitchen waste. Food waste is mainly composed of sugars, oils, proteins, inorganic salts and cellulose, among which carbohydrates account for about 30% to 60%, proteins account for 6% to 10%, oils and fats account for 7% to 30%, an...

Claims

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Application Information

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IPC IPC(8): B09B3/35B09B3/30B09B3/00B09B5/00B09B101/70
CPCB09B3/35B09B3/30B09B3/00B09B5/00B09B2101/70
Inventor 胡思海肉孜姑·吾斯曼孙然马丽莎孙晓锋吴耀国
Owner RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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