Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Exposure level prediction method of organic chemical of anaerobic-aerobic treatment system of wastewater

An organic chemical, aerobic treatment technology, applied in aerobic and anaerobic process treatment, electrical digital data processing, special data processing applications, etc., can solve problems such as unseen chemicals

Active Publication Date: 2015-05-13
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, there are no domestic and foreign models simulating the fate and exposure levels of chemicals under STP anaerobic-aerobic process conditions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Exposure level prediction method of organic chemical of anaerobic-aerobic treatment system of wastewater
  • Exposure level prediction method of organic chemical of anaerobic-aerobic treatment system of wastewater
  • Exposure level prediction method of organic chemical of anaerobic-aerobic treatment system of wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Select biphenyl as the chemical to be evaluated, and collect data on 8 basic physical and chemical properties of biphenyl, respectively molecular weight MW=154.21g.mol -1 , vapor pressure V=1261Pa, water-soluble S=7.5mg / L, adsorption coefficient lgK oc =3.27, anaerobic biodegradation rate k 10 =0.3h -1 , aerobic biodegradation rate k 5 = 1h -1 , daily discharge of chemicals ERC = 10kg.d -1 .

[0114] Collect or calculate the exposure scenario data of the wastewater anaerobic-aerobic biochemical treatment system, see Table 2. The exposure scene parameters of the sewage treatment plant can be obtained by referring to the design parameters and relevant process technical specifications. The volume of each box can be calculated according to the hydraulic retention time, suspended solid concentration, suspended solid density, deposited sludge thickness, and total STP area. The exposure scenario parameters given in this example are a standard, default value.

[0115] Ta...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an exposure level prediction method of organic chemicals of an anaerobic-aerobic treatment system of wastewater (STP(A / O) for short). The method comprises the following steps: by taking A / O biological treatment system of wastewater as a basic process, constructing a STP(A / O) concept model according to a coexisting relationship of gas, water, suspended particles and a sludge environment-friendly medium and a mass flow process of the chemicals; and by defaulting an environmental exposure scene parameter, just inputting the molecular weights of the chemicals, a vapor pressure (P), water solubility (S), anaerobic biodegradation rate (k10), aerobic biodegradation rate (k5), adsorption coefficient (Koc) and discharge (ERC) to predict the exposure level. The prediction method is simple and feasible, fewer in measured parameters and relatively high in predicting accuracy, and has important meaning for evaluating exposure risk of the chemical.

Description

technical field [0001] The invention relates to the field of chemical environmental risk assessment, and relates to an exposure prediction method for an anaerobic-aerobic treatment system of organic chemical wastewater. Background technique [0002] my country is a big country in the research and development, production and use of chemicals. In addition to more than 45,000 existing chemical substances, thousands of new chemical substances are put into use every year. Sewage treatment plant (STP) is the key link for chemicals to enter the environment. Easily degradable chemicals can basically be completely removed in STP, but refractory chemicals are difficult to degrade after STP treatment, and some of them volatilize into the atmosphere and are Sludge adsorption and residual chemicals are discharged into the receiving water body with the secondary effluent, which has potential ecotoxic effects on the ecological environment, especially the aquatic ecosystem. [0003] At pre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F3/30G06F17/50
CPCY02A20/152
Inventor 刘济宁周林军冯洁林春骏石利利范德玲
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com