CIVIL7017: Advanced Waste Water Treatment And Recycling-Laboratory/Research Project - Engineering Assignment Help

Assignment Task

Introduction

Welcome to this experiment in which you can experiment the advanced wastewater treatment processes. The experiments in this study are based on the three advanced wastewater treatment processes namely, activated carbon treatment and ozone treatment and zeolite treatment.

Tasks

You will do mainly three exercises as detailed below:

Exercise 1 involves measuring parameters in;

a) a wastewater treatment plant effluent

b) an activated carbon column treated effluent

c) an ozone treated effluent

d) zeolite column treated effluent

Parameters to be measured are:

1. dissolved oxygen (DO)

2. bromide (Br)

3. nitrogen (N)

4. phosphorus (P)

5. dissolved organic carbon (DOC)

6. heavy metals

7. total bacterial count

Use Table 1 for recording data.

 Table1: Sample Parameters

After analysing the data in Table 1, compare each treatment in terms of removal of different compounds present in the wastewater.

Procedures

1. Activated carbon treatment

• Take 1L beaker
• Add 500 mL of wastewater into the beaker
• Add 50 mg/L of powdered activated carbon into the beaker
• Place the beaker on a magnetic stirrer and stir for 15 minutes
• Let it settle for a few minutes and filter using a 0.45 um filter and measure the required parameters

2. Ozone treatment

• Take 1L beaker
• Add 500 mL of wastewater into the beaker
• Aerate the sample with ozone using the ozone generator for 2 minutes
• Let the sample settle for a few minutes and filter using a 0.45 um filter and measure the required parameters

3. Zeolite treatment

• Take 1L beaker
• Add 500 mL of wastewater into the beaker
• Add 50 mg/L of zeolite into the beaker
• Place the beaker on a magnetic stirrer and stir for 15 minutes
• Let it settle for a few minutes and filter using a 0.45 um filter and measure the required parameters

Select the best advanced treatment option from above to treat the following types of treated wastewaters.

Table 2: Select the best advanced treatment process for the following

Exercise 2 involves determining DO disappearance rate in the wastewater treatment plant effluent.

Procedures

(i) DO disappearance rate

• Obtain a 1L beaker
• Fill the beaker with wastewater sample
• Aerate the sample inside the beaker for 2 minutes
• Measure and record DO at 3-minute intervals for 1 hour (use table 3)

Table 3: DO concentration with time

• prepare the curve of DO vs time
• Discuss about DO disappearance rate (gradient of the curve) of the sample

Exercise 3 involves determining total bacterial count after 1 week in the samples (b), (C) and (d).

500 mL of the treated samples (b), (c) and (d) will be dosed with 1 mg/L of activated sludge and will be left for a period of 1 week and will be measured for total bacterial count

Preparation before coming to the lab:

Research about typical domestic wastewater, sewage treatment plant effluent characteristics, possible reuse scenarios, resource values of wastewater. The resource value should include energy recovery, nitrogen and phosphorous recovery, potential of heavy metals to recover, possible microbiological risks and how disinfection of effluent is carried out, Is there any alternate ways to manage wastewater and effluent.

The methods of measuring the parameters will be given and demonstrated. 1he students will form a group of three and will be performing most of the experiments with the guidance from tutors responsible for such activity.

Report and Analysis

The following should be included in the report.

• Discussion on results obtained from the experiment and the related calculations
• Graphical presentation to explain your lab result
• Discuss advantages and disadvantages of evaluated methods for different applications
• Potential reuse recovery application of wastewater effluent reuse and why you think it is a good strategy. Should analyse at least two scenarios and suggest one.
• Potential alternate way of managing/treating wastewater than current activated sludge process
• Conclusions

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