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Shell powder degradation agent for degrading petroleum hydrocarbon

A technology of shell powder and degrading agent, which is applied in the fields of special compound water treatment, water pollutants, water/sludge/sewage treatment, etc. The effect of degradation efficiency

Inactive Publication Date: 2016-07-27
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Researchers have proposed many substances as possible carrier materials, such as peat, clay, plant materials, etc. However, the properties of these materials are not suitable for application in marine environments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. Obtaining shell powder: select shell powder with a particle size of 60 to 100 meshes, and the shell powder can also be prepared through the following steps: (1) collect mollusc shells such as oysters and clams, and remove the flesh inside the shell Then rinse with clean water, and finally dry at 105°C; (2) crush the shells with a pulverizer and sieve.

[0016] 2. Preparation of shell powder degradation agent with nutrient salts:

[0017] (1) 10gNH 4 NO 3 and 5gK 2 HPO 4 Add 100mL of distilled water to obtain a nutrient salt solution after fully dissolving. Add the nutrient salt solution into a container containing 30g of shell powder (60-100 mesh in particle size) and mix well, and shake the mixture of the two at a speed of 150r / min for 6 hours on a Conrad shaker to make the nutrient salt The solute in the solution is fully adsorbed on the shell powder.

[0018] (2) Centrifuge the mixture of shell powder and nutrient salt solution at a rotational speed of 1000-...

Embodiment 2

[0021] (1) Mix 250g urea, 250gNaH 2 PO 4 ·7H 2 O and 50g of yeast extract powder were dissolved in 1L of water to obtain a nutrient salt solution. Add the nutrient salt solution into a container containing 800g of shell powder (60-100 mesh in particle size) and mix well, and vibrate the mixture of the two at a speed of 150r / min for 10 hours on a Conrad shaker.

[0022] (2) The mixture of shell powder and nutrient salt solution is centrifuged to remove water, and the shell powder degradation agent is obtained after vacuum freeze-drying.

[0023] The shell powder degrading agent obtained in this embodiment can carry 0.2 g of nutrient salt per gram of shell powder.

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Abstract

The invention discloses a shell powder degradation agent for degrading petroleum hydrocarbon and carrying nutritive salt. Shell powder serving as a carrier adsorbs nutritive salt capable of being used by microorganisms and containing nitrogen elements and phosphorus elements. The nutritive salt further contains vitamins and microelements. Further, the preferable mole ratio of the nitrogen elements to the phosphorus elements in the nutritive salt is (8:1)-(16:1). The invention further discloses a preparation method of the shell powder degradation agent. The preparation method comprises steps as follows: 1), the nutritive salt is dissolved in water to form a nutritive salt solution and mixed with the shell powder sufficiently; 2), a mixture of the nutritive salt solution and the shell powder is dried. The shell powder degradation agent effectively solves the problem of a poor degradation effect caused by severe loss of nutritive salt in an open water area, has the advantages that the petroleum hydrocarbon degradation efficiency is high, the preparation process is simple and the cost is low, and can be applied to environment restoration in petroleum-polluted water areas such as ports and the like on a large scale.

Description

technical field [0001] The invention relates to the field of petroleum hydrocarbon degradation, in particular to a nutrient-carrying shell powder degradation agent for degrading petroleum hydrocarbons. Background technique [0002] As a transportation hub for safe entry and exit of ships and berthing, ports discharge ship waste oil and oily sewage during ship navigation, berthing, loading and unloading, oil leakage from land transport machinery operating in the port area, and waste oil generated from ship repair and cleaning. and oily sewage, making the port a long-term source of marine oil pollution. Even in the absence of tanker accidents, oil pollution will continue to enter the sea area of ​​the port, causing great harm to the ecological environment of the port. At the same time, it also affects the normal life of nearby residents. Therefore, effective remediation of port oil pollution is the key to controlling marine oil pollution. Conventional treatment methods for oi...

Claims

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Application Information

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IPC IPC(8): C02F3/34
CPCC02F3/34C02F3/347C02F2101/32C02F2305/06
Inventor 田胜艳张彤贾新苗
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY