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Method for treating heavy metal wastewater through fish bone dust

A fish bone meal and heavy metal technology, applied in multi-stage water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of underutilization and single use, and achieve the prevention of adsorption saturation, short cycle, and prevention of discarding and burying Effect

Inactive Publication Date: 2016-06-01
GUANGZHOU JUZHU GENERAL TECH INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of in-depth research on comprehensive processing and utilization technologies, waste fish bones are currently widely used in the production of fish bone meal, which is rich in nutrition and simple in production technology. However, most of the time, fish bone meal is only used as a food additive with a single purpose and has not been fully utilized.

Method used

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  • Method for treating heavy metal wastewater through fish bone dust

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Measure 500ml of copper-containing wastewater, add 0.3g of freshwater fish bone powder with a particle size of 120 mesh, stir well and let stand for 15min;

[0027] (2) Adjust the pH value of the copper-containing wastewater to 5.0 and heat it to 40°C, then add 0.02% papain, neutral protease and elastase to react for 1.5h;

[0028] (3) Heat the fish bone meal to 250°C, and let the copper-containing wastewater pass through 3.5g of high-temperature fish bone meal at a rate of 1.5ml / min. After cooling down to room temperature, centrifuge to remove the precipitate, and measure Cu in the supernatant. 2+ concentration, the results are shown in Table 1.

Embodiment 2

[0030] (1) Measure 500ml of zinc-containing waste water, add 0.9g of marine fish bone powder with a particle size of 140 mesh, stir well and let stand for 28min;

[0031] (2) Adjust the pH value of the zinc-containing wastewater to 6.5 and heat it to 48°C, then add 0.03% papain, neutral protease and elastase to react for 1.5h;

[0032] (3) Heat the fish bone meal to 320°C, and let the zinc-containing waste water pass through 3.5g of high-temperature fish bone meal at a rate of 3.0ml / min, cool down to room temperature, centrifuge to remove the sediment, and measure the Mn in the supernatant 2+ concentration, the results are shown in Table 1.

Embodiment 3

[0034] (1) Measure 500ml of lead-containing wastewater, add 1.4g of freshwater fish bone meal with a particle size of 160 mesh, stir well and let stand for 40min;

[0035] (2) Adjust the pH value of lead-containing wastewater to 8.0 and heat it to 55°C, then add 0.05% papain, neutral protease and elastase to react for 1.5h;

[0036] (3) Heat the fish bone meal to 380°C, and let lead-containing waste water pass through 4.5g of high-temperature fish bone meal at a rate of 4.5ml / min, cool down to room temperature, and then centrifuge to remove sediment, and measure Pb in the supernatant 2+ concentration, the results are shown in Table 1.

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Abstract

The invention provides a method for treating heavy metal wastewater through fish bone dust. The method includes the following steps of 1, room-temperature standing adsorption, wherein the fish bone dust is added to the heavy metal wastewater, and the mixture is stirred to be uniform and then stands; 2, enzymatic adsorption, wherein the pH value of the wastewater is adjusted, and papain, neutral protease and elastinase are added for a reaction for 1.5 h; 3, high-temperature dynamic adsorption, wherein the heavy metal wastewater flows through the high-temperature fish bone dust, and precipitate is removed through centrifugation. According to the method for treating the heavy metal wastewater, expensive heavy metals in the wastewater are recycled with low price, the defect that cost for recycling the heavy metals is high is overcome, secondary pollution is not generated, the recycling process is simple, and the period is short. The low-additional-value fish bone dust is fully utilized, and then the situation that fish bone leftovers are abandoned and buried, and the environment is polluted is avoided.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a method for treating heavy metal waste water by using fish bone meal. Background technique [0002] Heavy metal wastewater refers to wastewater containing heavy metals (such as cadmium, nickel, mercury, zinc, etc.) discharged from industrial production processes such as mining and metallurgy, machinery manufacturing, chemical industry, electronics, and instrumentation. Heavy metals in water not only produce toxic reactions, but also have long-term toxicity, and can also be enriched by organisms in large quantities, and no matter what treatment method or microorganisms are used, they cannot be degraded into harmless substances. Heavy metal pollution in water bodies will affect the health of the population in many ways and at multiple levels, causing reproductive disorders, abnormal development and other hazards. Japan's "Minamata Disease" and "Tai Pain Disease", ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/20
CPCC02F9/00C02F1/286C02F3/342C02F2101/20C02F2301/08
Inventor 杨广群曹丽萍
Owner GUANGZHOU JUZHU GENERAL TECH INST CO LTD