# US 10,870,598 B2 · Method for deeply processing highly contaminated wastewater and wastewater processing system using

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,870,598 B2
- Document ID: US10870598B2
- Status: Granted
- Kind: B2
- Application number: 16/255,603
- Filed: 2019-01-23
- Published: 2019-12-05
- Granted: 2020-12-22
- Earliest claimed: 2018-05-30
- Assignees: Cleanaway Company Limited
- Applicants: Cleanaway Company Limited
- Inventors: Lwon-Kuo Sung
- Web page: https://patentgrep.com/patent/US10870598B2

## CPC

- C02F 9/00: Multistage treatment of water, waste water or sewage
- C02F 1/041: {by means of vapour compression}
- C02F 1/283: {using coal, charred products, or inorganic mixtures containing them}
- C02F 1/441: {by reverse osmosis}
- C02F 1/66: by neutralisation; pH adjustment (for degassing C02F1/20; using ion-exchange C02F1/42; for flocculation or precipitation of suspended impurities C02F1/52; for removing dissolved compounds C02F1/58)
- C02F 1/722: {Oxidation by peroxides}
- C02F 1/725: {by catalytic oxidation}
- C02F 11/13: by heating
- C02F 2101/16: Nitrogen compounds, e.g. ammonia
- C02F 2101/322: {Volatile compounds, e.g. benzene}
- C02F 2103/06: Contaminated groundwater or leachate
- C02F 2301/046: Recirculation with an external loop
- C02F 2305/026: Fenton's reagent
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

A method for deeply processing highly contaminated wastewater having salts and volatile organic compounds includes the steps of: performing mechanical vapor recompression on the wastewater to form a first concentrate liquid and a first condensing liquid; performing drying on the first concentrate liquid to form a waste solid and a second condensing liquid; performing reverse osmosis on the first condensing liquid and the second condensing liquid to form a filtrate and a second concentrate liquid; performing Fenton's oxidation on the second concentrate liquid to form an oxidized liquid; and performing mechanical vapor recompression, drying, reverse osmosis, and Fenton's oxidation as above on the oxidized liquid in sequence. Additionally, active carbon adsorption is optionally performed on the filtrate to form a re-filtrate.

## Claims

### Claim 1

A method for deeply processing highly contaminated wastewater having salts and volatile organic compounds, comprising:
a) performing mechanical vapor recompression (MVR) on the wastewater to form a first concentrate liquid and a first condensing liquid;
b) performing drying on the first concentrate liquid to form a waste solid and a second condensing liquid;
c) performing reverse osmosis on the first condensing liquid and the second condensing liquid to form a filtrate and a second concentrate liquid;
d) performing Fenton's oxidation on the second concentrate liquid to form an oxidized liquid; and
e) further processing the oxidized liquid by performing steps a), b), c), and d) on the oxidized liquid in sequence.

### Claim 2 (depends on 1)

The method as claimed in claim 1, further comprising:
after the reverse osmosis step, performing active carbon adsorption on the filtrate to form a re-filtrate.

### Claim 3 (depends on 1)

The method as claimed in claim 1, further comprising:
before the mechanical vapor recompression step, adding an acid to the wastewater.

### Claim 4 (depends on 3)

The method as claimed in claim 3, wherein the acid is a sulfuric acid.

### Claim 5 (depends on 1)

The method as claimed in claim 1, wherein the Fenton's oxidation is Fered-Fenton's (Fenton III) oxidation.

### Claim 6 (depends on 1)

The method as claimed in claim 1, wherein the mechanical vapor recompression has a heating temperature from 70 to 80° C. and an evaporation pressure from −0.45 to −0.55 kg/cm2.

### Claim 7 (depends on 1)

The method as claimed in claim 1, wherein the drying has a heating temperature from 120 to 130° C.

### Claim 8 (depends on 1)

The method as claimed in claim 1, wherein the wastewater is leachate or industrial wastewater.