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A method for treating cd2+ or cu2+ waste water with animal blood meal as adsorbent

A technology of animal blood meal and adsorbent, applied in the direction of adsorption water/sewage treatment, multi-stage water treatment, metallurgical wastewater treatment, etc., can solve the problems of poor removal effect, high operating cost, complicated operation, etc., and achieve low price and wide source , Realize the effect of waste resource utilization

Active Publication Date: 2019-04-19
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the disadvantages of complex operation, high operating cost, and poor removal effect in several commonly used wastewater treatment methods containing heavy metal ions, the present invention proposes a method that takes animal blood from slaughterhouses as raw material, processes it into animal blood meal, and uses it as an adsorbent to treat wastewater containing heavy metal ions. Method and application of heavy metal ion wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: the preparation method of animal blood meal

[0015] The animal blood discarded in the slaughterhouse is dried by high-temperature airflow at 155°C to form coarse blood meal particles. After drying, the water content is 10%, and then crushed into 100-mesh animal blood meal adsorbent, which becomes a highly efficient adsorbent for heavy metal ions.

Embodiment 2

[0016] Embodiment 2: one-step method is processed Cd 2+ Concentrated Wastewater Method

[0017] ① In a 12-ton reactor, there are 10 tons of -1 Cd 2+ Add 40kg of the animal blood meal adsorbent prepared above to the solution, adjust the pH value to 5.0, stir and adsorb at room temperature for 2 hours at a stirring speed of 80 rpm, and filter to obtain a filtrate with low concentration of heavy metal ions.

[0018] ②Put 50mL of the filtrate in step ① into a 150mL Erlenmeyer flask, add 2.5mL of nitric acid, heat and digest on a hot plate to ensure that the sample does not boil, steam to about 5mL, add 2.5mL of nitric acid and 1 mL of perchloric acid again, and then Evaporate to about 1mL, remove and cool, add ultrapure water to make up to 50mL, and then use WYS2200 atomic absorption spectrophotometer to measure the concentration of residual cadmium ions in this constant volume solution.

[0019] The measurement result is the remaining Cd in the filtered solution 2+ The ion co...

Embodiment 3

[0020] Embodiment 3: Two-step method processes Cd in electroplating wastewater 2+ Methods

[0021] ①Because electroplating wastewater is usually discharged after chemical precipitation treatment and then conventional adsorbent treatment process, but it is usually difficult to meet the discharge standard, so it is necessary to improve the process or adsorbent, and first remove the high concentration of Cd after chemical precipitation treatment 2+ Wastewater is treated in the first step, that is, according to the ratio of the amount of animal blood meal added to the total content of heavy metal ions at 1:5 (g:mg), specifically, in a 12-ton reactor or reaction pool, input 10 tons of Cd after chemical precipitation treatment 2+ Solution, Cd 2+ The concentration is 20mg·L -1 , add 40kg of the animal blood meal adsorbent prepared above, adjust the pH value to 5.0, stir and adsorb for 2h, the stirring speed is 80 rpm, and filter to obtain the remaining Cd 2+ The ion concentration...

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PUM

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Abstract

The invention discloses a method for treating Cd<2+> / Cu<2+> wastewater by using animal blood powder as an adsorbent. The animal blood powder can be utilized to efficiently remove cadmium and copper ions in the wastewater, so that the concentrations of the residual heavy cadmium and copper ions in the treated wastewater reach the discharge standards after wastewater treatment. The animal blood powder has the advantages of wide raw material sources and low price, and has broad market prospects. When the heavy metal ion concentration in the wastewater is lower, the animal blood powder with adsorbed heavy metal ions can also be used as flower soil in gardens, thereby achieving the goal of recycling waste materials and resources.

Description

technical field [0001] The invention belongs to the field of solid waste—recycling of slaughterhouse blood and its application in sewage treatment, and in particular relates to a method for treating waste water containing heavy metal ions by using animal blood meal as an adsorbent. Background technique [0002] With the development of modern industry, the pollution of water containing heavy metal ions is becoming more and more serious. How to obtain new, cheap, and high adsorption capacity (or high removal rate) adsorption materials has become one of the key contents of the research on the treatment of wastewater containing heavy metal ions. Currently developed and applied wastewater treatment methods containing heavy metal ions mainly include chemical precipitation, electrolysis, ion exchange, coagulation or flocculation, membrane separation, and adsorption. The chemical precipitation method is to convert the dissolved heavy metal ions in the wastewater into water-insoluble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/62B01J20/24C02F103/16
CPCB01J20/24C02F1/286C02F2103/16C02F2301/08
Inventor 李亚东李思彤王行国陈红兵李顺意倪红杨兰芳李海波
Owner HUBEI UNIV