Session II

Undertakingan EnTA

Key Objectives of Session

• The following sessions are designed to familiarise you with the EnTA methodology, and with the worksheets that facilitate completion of an EnTA.

• By the end of these sessions you will have an understanding of the EnTA process and requirements of the EnTA Workbook.

The EnTA Process

EnTA Preparation

• Establish the goals of the assessment, along with identification of the ways these goals will be achieved.

• Secure the commitment of key players in the assessment.

• Identify the resources (financial, human, technical etc) that are available to the assessment team.

Step 1

Technology Description

Name of the technology system: Neutralisation and steam stripping

Step 1: Description of Technology

Surrounding land use: Industrial Estate with mix of light and heavy industrySite location: East Industrial Estate, Udanax City, Udanax

b. Identify and characterise the existing or proposed location of the technology:

a. Identify the nature and function of the technology

Function of the technology: The treatment of spent caustic from Ana Plastics

Natural hazards: None of consequenceNatural environmental features: Flat land, 10km from the coastSurrounding community: On the northwest border of the estate middle class residence

3.

As above

What must the technology achieve? Identify the beneficiaries & other stakeholders?

d. In order of importance, identify the principal achievement goals for this technology and the beneficiaries and stakeholders.

1. A treatment system that meets the requirements of the Water Pollution Regulations (1981) regarding the discharge of effluents.

Plant owners and operators, plant workers, central and municipal government and Udanax public

2. No or acceptable environmental impacts from the treated wastewater discharged from the plant

1.

2.

What other achievements are desirable? Who are the beneficiaries/stakeholders?

X

X

X

Type of technology Based on the use of natural resourcesProcessing/manufacturingService/infrastructure

Source of the technology

Relatively new/unproven technology

c. Describe the technology (check appropriate boxes using a capital 'X')

Proposed

Technology indigenous to the areaTechnology imported from abroad

Existing

Provide a flow diagram of the overall process or service, indicating the various sub-processes/components, showing material, energy and water inputs and output flows and identifying linkages between the different components and the external environment.

f. Flow diagram of the technology

H2SO4

Steam

Spent Caustic

Tank

Storage Tank

Feed Pump

Neutralisation TankFeed PumpStripper

Feed Pump

Stripper

To Claus Unit or to Flare

Cooler

To Biological Treatment

pH Adjustment

NaOH

SpentCaustic

Step 2

Identify Environmental Pressures

Similar Worksheets for:

• wastes and hazardous products• infrastructure required by the technology• supporting technologies required• human resource demands• other direct impacts

Worksheet A

Performance Data

• MaESTRO• Technical publications• Academic Journals• Expert information