WetSep · [email protected] WET-B-2017.002/2.2 Units 601 & 602, 6/F, Lakeside 2, No.10 Science...

The information provided in this brochure contains general

descriptions or characteristics of performance which in actual

case of use do not always apply as described or which may

change as a result of further development of the products. An

obligation to provide the respective characteristics shall only

exist if expressly agreed in the terms of contract.

Subject to change without prior notice.

Copyright © 2017 Waste & Environmental Technologies Ltd.

Waste & Environmental Technologies Ltd.

www.wetsep.com [email protected]

WET-B-2017.002/2.2

Units 601 & 602, 6/F, Lakeside 2, No.10 Science Park West Avenue,

Phase II, Hong Kong Science Park, Shatin, N.T., Hong Kong

Tel: +852 2602 0308 Fax: +852 2694 7757

WetSep Water & Wastewater Filtration System

Waste & Environmental Technologies Ltd. (WET) is a green

technology entrepreneur with innovation as its guiding

principle.

Since 1998, WET has innovated new technologies in the

field of Low Impact Construction and Sustainable

Development. We are one of the few companies that

have international experience in construction runoff

treatment. We have completed projects on 5 continents.

Our Vision is to explore pioneer and innovate in

environmental technologies that people can benefit for a

better quality of life and a sustainable future.

To achieve our Mission, we focus on the

‧Simple to Apply / Use;

‧Minimize Capital Expenditure;

‧Not Energy Intensive (Require Little Non-renewable

Energy to Build, Operate and Maintain);

‧Use Local Resources and Labour; and

‧Nurture the Environment and Human Health.

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Glossary

Biochemical Oxygen Demand (BOD)

BOD is the amount of dissolved oxygen needed by

aerobic biological organisms in a body of water to

break down present organic materials. It is

measured in a given water sample at certain

temperature over a specific time period. The BOD

value is commonly expressed in milligrams of

oxygen consumed per litre of sample (mg/L)

during 5 days of incubation at 20°C and is often

used as a robust surrogate of the degree of

organic pollution of water.

Oil and Grease (O&G)

O&G is a measure of a variety of substances

including fuels, motor oil, lubricating oil, hydraulic

oil, cooking oil and animal-derived fats. The

concentration of these substances is typically

measured within a water body. Lakes, rivers,

stormwater runoff and wastewater are all

monitored for O&G. Sources of O&G are mainly

anthropogenic. O&G need to be reduced to keep

them from entering the environment.

Chemical Enhanced Primary Treatment

(CEPT)

CEPT is recommended by Word Bank as the most

effective and energy efficient method of water

and wastewater treatment. Chemical reagents

such as coagulant and flocculent are applied to

allow the suspended solids to settle faster thereby

enhancing treatment efficiency.

pH

pH is a measure of the acidity or basicity of an

aqueous solution. Pure water is said to be neutral,

with a pH value closes to 7.0 at 25°C. Solutions with

a pH value less than 7.0 are said to be acidic and

solutions with a pH value greater than 7.0 are said

to be alkaline.

Chemical Oxygen Demand (COD)

COD is a useful measure of water quality as it can

determine the amount of organic pollutants found

in surface water (e.g. lakes and rivers) or

wastewater. It is expressed in milligrams of oxygen

consumed per litre of solution (mg/L).

Suspended Solids (SS)

SS refers to small solid particles which remain in

suspension in water as colloid. It is used as an

indicator of water quality.

Coagulation

Wastewater contains small particles that suspend

in water forming colloid that carries the same

charge, opposes each other and prevent the

formation of larger particles. Coagulant is added

to neutralise the charge that results in easier

flocculation and faster sedimentation

performance of particles.

Total Petroleum Hydrocarbon (TPH)

TPH is a term used for any mixture of hydrocarbons

that are found in waste water. There are hundreds

of compounds, but not occur all in one sample.

With different chemicals in crude oil and other

petroleum products, it is not practical to measure

each one separately. However, it is useful to

measure the total amount of TPH at a site.

Flocculation

Particles settle faster if they are heavier. By dosing

the flocculent to water, particles form flocs that

increase the particle size and result in faster sedi-

mentation by gravity.

Turbidity

Turbidity is the cloudiness or haziness of a fluid

caused by individual particles (SS) that are

generally invisible to the naked eye. The

measurement of turbidity is a key test of water

quality.

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WetSep Water & Wastewater Filtration System

Introduction

The WetSep System is a patented product

providing a turn-key solution for wastewater

treatment. The WetSep is a versatile system

and can be applied in various types of

industries and applications.

WetSep has established itself as good

maintenance system and has satisfied the

requirements of many clients around the

world.

Surface runoff such as grit, suspended

particles and sewage from temporary

sanitary facilities will produce wastewater.

The wastewater usually contains high

concentration of suspended solids, BOD,

ammonia and E. coil.

In 1998, Waste & Environmental

Technologies Ltd. Innovated the WetSep

system. We have delivered the WetSep to

17 different countries including USA,

Australia, Singapore and Saudi Arabia.

Mobile Modular

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Water & Wastewater Filtration System Features / Benefits

• Multi-functional use

• Mobile and modular design for easy

transportation

• Environmentally friendly and compact

design for small footprint requirement

• No power driven mechanical parts, the

flow is by gravity

• Simple operation that requires minimal

training

• Low capital, operation and

maintenance costs

• PLC control for low operating costs and

safety interlocks

• ISR tank with Conical Filter for mixing

and settling

• Lamella Plate Settlers for enhanced

settling

• Secondary containment installed within

the Chemical Preparation Unit to

prevent leaks to the environment

• Epoxy coated steel body frame for

superior corrosion resistance

• Suitable for various climate conditions

Performance

• 70-75% BOD and COD removal

• 99.5% suspended solids removal with

effluent SS level < 30 mg/L

Typical Applications

• Construction Runoff

• Tunneling

• Bore Piling

• Sewage Treatment

• Leachate Treatment Environmental-friendly

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Worldwide Experience

Vancouver, Canada

The WetSep system was installed for a

mass transit infrastructure project to

treat construction runoff. The system

provided a mobile slit management

solution with over 99% suspended solid

removal.

Washington, U.S.A.

The WetSep system was used to treat

construction wastewater from the site

of a new government building at the

U.S. Port of Entry to Canada in Blaine.

Ostersund, Sweden

The WetSep system was adopted in a

generator replacement project for the

Hydro-Electric Power Station. It was

used to treat construction wastewater

generated from tunnelling and exca-

vation works.

Sydney, Australia

The WetSep system was applied in the

North West Rail Link project. It was used

to treat construction wastewater

generated from drilling and blasting of

the Australia’s longest twin rail tunnels

for water re-use.

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Saudi Arabia

The WetSep system was adopted in the

collection sump to treat the turbid

wastewater. Chlorine disinfection was

applied to the treated wastewater for

water re-use.

Hong Kong

The WetSep system has been used to

treat leachate from refuse transfer sta-

tion and cement wastewater on the

barges for the Hong Kong International

Airport Third Runway project.

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8

WetSep

1. Inlet

For influent piping connection.

2. Impinging Stream Reactor (ISR)

ISR combines the process of coagulation, flocculation and

sedimentation in one system, by using conical filter.

3. Oil Drain

Allow scum, oil and floatables to be accumulated at the top of the

unit and be pushed towards the oil drain by gravity. An optional oil

cartridge system can be installed to capture the oil and grease.

4. Desludge System

Sludge is automatically removed from sludge hopper using a timer

and automatic valve.

5. Universal Processing Chamber (UPC)

UPC is designed to be a modular unit that allows different

treatment systems to be installed to treat various wastewater,

such as lamella blocks, zeolite, silica sand and activated

carbon.

6. Outlet

For effluent piping connection.

7. Control System

Various systems (PLC, Relay, SMS) are

available to provide an easy control

and monitoring.

Chemical Preparation Unit c/w Secondary Containment

A

B C

D E F

A: Control Panel

B: Dosing Pump

C: Mixer

D: Flocculent

E: Acid

F: Coagulant

Level Sensor

8. Chemical Preparation Unit

A complete package for chemical preparation,

such as coagulant, flocculent and acid. Automatic

controls are present to maintain the proper

chemical dosing rate.

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7

1

2

3

4

5

6

Conical Filter Lamella Blocks Standard Shipping Frame

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Chemical Enhanced Primary Treatment (CEPT)

is recommended by the World Bank as the

most effective and energy efficient method of

water and wastewater treatment due to the

high treatment efficiency.

The WetSep system uses the concept of CEPT.

The first stage of treatment is the Impinging

Stream Reactor (ISR) which does not require

any driven motors. Thus, it reduces the energy

requirement and simplifies the entire system. It

combines the process of coagulation,

flocculation and sedimentation in one system.

By precise engineering of the flow path, flow

rate, pressure differential and empirical data,

the treatment can be completed in one single

vessel.

Using Computational Fluid Dynamics (CFD)

modelling, the performance of the WetSep

system has been optimised to meet the needs

of a wide range of influent water quality.

The influent water first passes into the ISR for

the first stage of treatment. The ISR removes

80-85% of suspended solids (SS), oil and grease

from the influent water.

The second stage of treatment is the Universal

Processing Chamber (UPC). It is designed to

be a modular unit that allows different

treatment systems to be installed, such as

lamella plates, coalescing plates, membrane

or rapid sand filter, to treat various types of

wastewater. The choice of module depends

on the requirements of the treatment which

varies from project to project.

Effluent from the ISR and UPC treatment

processes has suspended solid removal

efficiency more than 99.5%.

Process Description

* WetSep 60E model is shown

Optional Equipment • Influent Flow Equalization Tank & Transfer Pump

• Sludge Pump

• Oil Filter Cartridge

• Remote Monitoring System

• Stainless Steel Body Frame

• Renewable Energy Sources (Solar, Wind)

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Technical Information

System Includes

• Impinging Stream Reactor (ISR) with Conical Filter • Universal Processing Chamber (UPC) with Lamella Block (For WetSep 60 & 80 only) • Secondary Containment Compartment • PLC Control Panel • Chemical Dosing / Preparation System • pH Controlling System

• Inline Static Mixer • Auto Desludge System • Grating and Handrail

WetSep 80 WetSep 60 WetSep 20 WetSep 10

Overall Dimension (mm)

Length 7,058 6,058 2,991 2,290

Width 2,438 2,438 2,438 1,910

Height 2,891 2,591 2,591 2,230

Net Weight (kg) 6,000 5,000 2,800 2,000

Capacity (m3/h) 80 60 20 10

Piping

Influent Inlet DN100 DN100 DN100 DN80

Effluent Outlet DN150 DN150 DN100 DN80

Sludge Outlet DN100 DN100 DN100 DN80

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WetSep · [email protected] WET-B-2017.002/2.2 Units 601 & 602, 6/F, Lakeside 2, No.10 Science...

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Transcript of WetSep · [email protected] WET-B-2017.002/2.2 Units 601 & 602, 6/F, Lakeside 2, No.10 Science...