dechlorination of sulfite compounds prior to effluent discharge Given sulfite dose (SO2:Cl2 ratio basis) (S) = 16.8000 mg/L; flow rate (Q) = 28.1000 MGD, determine the sulfite compound feed rate (dose) in lb/day.

Start with the thinking

• The governing relation printed in this handbook section is Dechlorination of Sulfite Compounds.
• Everything except dose is given, so isolate dose symbolically first — never rearrange after the numbers are in.
• Tabulate each given with its unit and confirm the units are consistent with the relation before substituting.
• Dechlorination of sulfite compounds neutralizes residual chlorine using a sulfite dose proportional to plant flow rate.

Step-by-step solution

1. Step 1 — State the governing relation:

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

2. Step 2 — Rearrange symbolically for dose:

   $$dose = 8.34\,S\,Q$$

3. Step 3 — List the givens: sulfite dose (SO2:Cl2 ratio basis) (S) = 16.8000 mg/L, flow rate (Q) = 28.1000 MGD.

4. Step 4 — Substitute the given values:

   $$dose = 8.34\,16.8000\,28.1000$$

5. Step 5 — Evaluate:

   $$dose = 3937\ \text{lb/day}$$

6. Step 6 — Check: returning dose = 3,937 lb/day to

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

   reproduces the given quantities, and both sides carry the same units.

Why the other options are there

• 7,874 — kept a factor of two that cancels in the correct rearrangement.
• 1,969 — dropped that same factor in the other direction.
• 4,331 — rounded an intermediate value before the final step.

Reference: FE Handbook — Dechlorination of Sulfite Compounds

dechlorination using sodium bisulfite feed rate at a treatment plant Given flow rate (Q) = 16.4000 MGD; sulfite compound feed rate (dose) = 7,701 lb/day, determine the sulfite dose (SO2:Cl2 ratio basis) (S) in mg/L.

Start with the thinking

• The governing relation printed in this handbook section is Dechlorination of Sulfite Compounds.
• Everything except S is given, so isolate S symbolically first — never rearrange after the numbers are in.
• Tabulate each given with its unit and confirm the units are consistent with the relation before substituting.
• Dechlorination of sulfite compounds neutralizes residual chlorine using a sulfite dose proportional to plant flow rate.

Step-by-step solution

1. Step 1 — State the governing relation:

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

2. Step 2 — Rearrange symbolically for S:

   $$S = \dfrac{dose}{8.34Q}$$

3. Step 3 — List the givens: flow rate (Q) = 16.4000 MGD, sulfite compound feed rate (dose) = 7,701 lb/day.

4. Step 4 — Substitute the given values:

   $$S = \dfrac{7701}{8.3416.4000}$$

5. Step 5 — Evaluate:

   $$S = 56.3037\ \text{mg/L}$$

6. Step 6 — Check: returning S = 56.3037 mg/L to

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

   reproduces the given quantities, and both sides carry the same units.

Why the other options are there

• 112.6 — kept a factor of two that cancels in the correct rearrangement.
• 28.1519 — dropped that same factor in the other direction.
• 61.9341 — rounded an intermediate value before the final step.

Reference: FE Handbook — Dechlorination of Sulfite Compounds

dechlorination of sulfite compounds dose calculation for a wastewater plant Given sulfite dose (SO2:Cl2 ratio basis) (S) = 13.3000 mg/L; sulfite compound feed rate (dose) = 3,656 lb/day, determine the flow rate (Q) in MGD.

Start with the thinking

• The governing relation printed in this handbook section is Dechlorination of Sulfite Compounds.
• Everything except Q is given, so isolate Q symbolically first — never rearrange after the numbers are in.
• Tabulate each given with its unit and confirm the units are consistent with the relation before substituting.
• Dechlorination of sulfite compounds neutralizes residual chlorine using a sulfite dose proportional to plant flow rate.

Step-by-step solution

1. Step 1 — State the governing relation:

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

2. Step 2 — Rearrange symbolically for Q:

   $$Q = \dfrac{dose}{8.34S}$$

3. Step 3 — List the givens: sulfite dose (SO2:Cl2 ratio basis) (S) = 13.3000 mg/L, sulfite compound feed rate (dose) = 3,656 lb/day.

4. Step 4 — Substitute the given values:

   $$Q = \dfrac{3656}{8.3413.3000}$$

5. Step 5 — Evaluate:

   $$Q = 32.9601\ \text{MGD}$$

6. Step 6 — Check: returning Q = 32.9601 MGD to

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

   reproduces the given quantities, and both sides carry the same units.

Why the other options are there

• 65.9202 — kept a factor of two that cancels in the correct rearrangement.
• 16.4800 — dropped that same factor in the other direction.
• 36.2561 — rounded an intermediate value before the final step.

Reference: FE Handbook — Dechlorination of Sulfite Compounds

dechlorination of sulfite compounds prior to effluent discharge Given sulfite dose (SO2:Cl2 ratio basis) (S) = 18.3000 mg/L; flow rate (Q) = 9.5000 MGD, determine the sulfite compound feed rate (dose) in lb/day.

Start with the thinking

• The governing relation printed in this handbook section is Dechlorination of Sulfite Compounds.
• Everything except dose is given, so isolate dose symbolically first — never rearrange after the numbers are in.
• Tabulate each given with its unit and confirm the units are consistent with the relation before substituting.
• Dechlorination of sulfite compounds neutralizes residual chlorine using a sulfite dose proportional to plant flow rate.

Step-by-step solution

1. Step 1 — State the governing relation:

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

2. Step 2 — Rearrange symbolically for dose:

   $$dose = 8.34\,S\,Q$$

3. Step 3 — List the givens: sulfite dose (SO2:Cl2 ratio basis) (S) = 18.3000 mg/L, flow rate (Q) = 9.5000 MGD.

4. Step 4 — Substitute the given values:

   $$dose = 8.34\,18.3000\,9.5000$$

5. Step 5 — Evaluate:

   $$dose = 1450\ \text{lb/day}$$

6. Step 6 — Check: returning dose = 1,450 lb/day to

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

   reproduces the given quantities, and both sides carry the same units.

Why the other options are there

• 2,900 — kept a factor of two that cancels in the correct rearrangement.
• 725.0 — dropped that same factor in the other direction.
• 1,595 — rounded an intermediate value before the final step.

Reference: FE Handbook — Dechlorination of Sulfite Compounds

dechlorination using sodium bisulfite feed rate at a treatment plant Given flow rate (Q) = 5.5000 MGD; sulfite compound feed rate (dose) = 2,252 lb/day, determine the sulfite dose (SO2:Cl2 ratio basis) (S) in mg/L.

Start with the thinking

• The governing relation printed in this handbook section is Dechlorination of Sulfite Compounds.
• Everything except S is given, so isolate S symbolically first — never rearrange after the numbers are in.
• Tabulate each given with its unit and confirm the units are consistent with the relation before substituting.
• Dechlorination of sulfite compounds neutralizes residual chlorine using a sulfite dose proportional to plant flow rate.

Step-by-step solution

1. Step 1 — State the governing relation:

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

2. Step 2 — Rearrange symbolically for S:

   $$S = \dfrac{dose}{8.34Q}$$

3. Step 3 — List the givens: flow rate (Q) = 5.5000 MGD, sulfite compound feed rate (dose) = 2,252 lb/day.

4. Step 4 — Substitute the given values:

   $$S = \dfrac{2252}{8.345.5000}$$

5. Step 5 — Evaluate:

   $$S = 49.0953\ \text{mg/L}$$

6. Step 6 — Check: returning S = 49.0953 mg/L to

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

   reproduces the given quantities, and both sides carry the same units.

Why the other options are there

• 98.1905 — kept a factor of two that cancels in the correct rearrangement.
• 24.5476 — dropped that same factor in the other direction.
• 54.0048 — rounded an intermediate value before the final step.

Reference: FE Handbook — Dechlorination of Sulfite Compounds

dechlorination of sulfite compounds dose calculation for a wastewater plant Given sulfite dose (SO2:Cl2 ratio basis) (S) = 14.2000 mg/L; sulfite compound feed rate (dose) = 7,597 lb/day, determine the flow rate (Q) in MGD.

Start with the thinking

• The governing relation printed in this handbook section is Dechlorination of Sulfite Compounds.
• Everything except Q is given, so isolate Q symbolically first — never rearrange after the numbers are in.
• Tabulate each given with its unit and confirm the units are consistent with the relation before substituting.
• Dechlorination of sulfite compounds neutralizes residual chlorine using a sulfite dose proportional to plant flow rate.

Step-by-step solution

1. Step 1 — State the governing relation:

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

2. Step 2 — Rearrange symbolically for Q:

   $$Q = \dfrac{dose}{8.34S}$$

3. Step 3 — List the givens: sulfite dose (SO2:Cl2 ratio basis) (S) = 14.2000 mg/L, sulfite compound feed rate (dose) = 7,597 lb/day.

4. Step 4 — Substitute the given values:

   $$Q = \dfrac{7597}{8.3414.2000}$$

5. Step 5 — Evaluate:

   $$Q = 64.1487\ \text{MGD}$$

6. Step 6 — Check: returning Q = 64.1487 MGD to

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

   reproduces the given quantities, and both sides carry the same units.

Why the other options are there

• 128.3 — kept a factor of two that cancels in the correct rearrangement.
• 32.0743 — dropped that same factor in the other direction.
• 70.5635 — rounded an intermediate value before the final step.

Reference: FE Handbook — Dechlorination of Sulfite Compounds

dechlorination of sulfite compounds prior to effluent discharge Given sulfite dose (SO2:Cl2 ratio basis) (S) = 8.6000 mg/L; flow rate (Q) = 3.8000 MGD, determine the sulfite compound feed rate (dose) in lb/day.

Start with the thinking

• The governing relation printed in this handbook section is Dechlorination of Sulfite Compounds.
• Everything except dose is given, so isolate dose symbolically first — never rearrange after the numbers are in.
• Tabulate each given with its unit and confirm the units are consistent with the relation before substituting.
• Dechlorination of sulfite compounds neutralizes residual chlorine using a sulfite dose proportional to plant flow rate.

Step-by-step solution

1. Step 1 — State the governing relation:

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

2. Step 2 — Rearrange symbolically for dose:

   $$dose = 8.34\,S\,Q$$

3. Step 3 — List the givens: sulfite dose (SO2:Cl2 ratio basis) (S) = 8.6000 mg/L, flow rate (Q) = 3.8000 MGD.

4. Step 4 — Substitute the given values:

   $$dose = 8.34\,8.6000\,3.8000$$

5. Step 5 — Evaluate:

   $$dose = 272.6\ \text{lb/day}$$

6. Step 6 — Check: returning dose = 272.6 lb/day to

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

   reproduces the given quantities, and both sides carry the same units.

Why the other options are there

• 545.1 — kept a factor of two that cancels in the correct rearrangement.
• 136.3 — dropped that same factor in the other direction.
• 299.8 — rounded an intermediate value before the final step.

Reference: FE Handbook — Dechlorination of Sulfite Compounds

dechlorination using sodium bisulfite feed rate at a treatment plant Given flow rate (Q) = 6.4000 MGD; sulfite compound feed rate (dose) = 6,873 lb/day, determine the sulfite dose (SO2:Cl2 ratio basis) (S) in mg/L.

Start with the thinking

• The governing relation printed in this handbook section is Dechlorination of Sulfite Compounds.
• Everything except S is given, so isolate S symbolically first — never rearrange after the numbers are in.
• Tabulate each given with its unit and confirm the units are consistent with the relation before substituting.
• Dechlorination of sulfite compounds neutralizes residual chlorine using a sulfite dose proportional to plant flow rate.

Step-by-step solution

1. Step 1 — State the governing relation:

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

2. Step 2 — Rearrange symbolically for S:

   $$S = \dfrac{dose}{8.34Q}$$

3. Step 3 — List the givens: flow rate (Q) = 6.4000 MGD, sulfite compound feed rate (dose) = 6,873 lb/day.

4. Step 4 — Substitute the given values:

   $$S = \dfrac{6873}{8.346.4000}$$

5. Step 5 — Evaluate:

   $$S = 128.8\ \text{mg/L}$$

6. Step 6 — Check: returning S = 128.8 mg/L to

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

   reproduces the given quantities, and both sides carry the same units.

Why the other options are there

• 257.5 — kept a factor of two that cancels in the correct rearrangement.
• 64.3829 — dropped that same factor in the other direction.
• 141.6 — rounded an intermediate value before the final step.

Reference: FE Handbook — Dechlorination of Sulfite Compounds

dechlorination of sulfite compounds dose calculation for a wastewater plant Given sulfite dose (SO2:Cl2 ratio basis) (S) = 14.7000 mg/L; sulfite compound feed rate (dose) = 2,503 lb/day, determine the flow rate (Q) in MGD.

Start with the thinking

• The governing relation printed in this handbook section is Dechlorination of Sulfite Compounds.
• Everything except Q is given, so isolate Q symbolically first — never rearrange after the numbers are in.
• Tabulate each given with its unit and confirm the units are consistent with the relation before substituting.
• Dechlorination of sulfite compounds neutralizes residual chlorine using a sulfite dose proportional to plant flow rate.

Step-by-step solution

1. Step 1 — State the governing relation:

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

2. Step 2 — Rearrange symbolically for Q:

   $$Q = \dfrac{dose}{8.34S}$$

3. Step 3 — List the givens: sulfite dose (SO2:Cl2 ratio basis) (S) = 14.7000 mg/L, sulfite compound feed rate (dose) = 2,503 lb/day.

4. Step 4 — Substitute the given values:

   $$Q = \dfrac{2503}{8.3414.7000}$$

5. Step 5 — Evaluate:

   $$Q = 20.4163\ \text{MGD}$$

6. Step 6 — Check: returning Q = 20.4163 MGD to

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

   reproduces the given quantities, and both sides carry the same units.

Why the other options are there

• 40.8326 — kept a factor of two that cancels in the correct rearrangement.
• 10.2082 — dropped that same factor in the other direction.
• 22.4580 — rounded an intermediate value before the final step.

Reference: FE Handbook — Dechlorination of Sulfite Compounds

dechlorination of sulfite compounds prior to effluent discharge Given sulfite dose (SO2:Cl2 ratio basis) (S) = 14.3000 mg/L; flow rate (Q) = 50.0000 MGD, determine the sulfite compound feed rate (dose) in lb/day.

Start with the thinking

• The governing relation printed in this handbook section is Dechlorination of Sulfite Compounds.
• Everything except dose is given, so isolate dose symbolically first — never rearrange after the numbers are in.
• Tabulate each given with its unit and confirm the units are consistent with the relation before substituting.
• Dechlorination of sulfite compounds neutralizes residual chlorine using a sulfite dose proportional to plant flow rate.

Step-by-step solution

1. Step 1 — State the governing relation:

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

2. Step 2 — Rearrange symbolically for dose:

   $$dose = 8.34\,S\,Q$$

3. Step 3 — List the givens: sulfite dose (SO2:Cl2 ratio basis) (S) = 14.3000 mg/L, flow rate (Q) = 50.0000 MGD.

4. Step 4 — Substitute the given values:

   $$dose = 8.34\,14.3000\,50.0000$$

5. Step 5 — Evaluate:

   $$dose = 5963\ \text{lb/day}$$

6. Step 6 — Check: returning dose = 5,963 lb/day to

   $$SO_2\text{ dose} = 8.34 \times S \times Q$$

   reproduces the given quantities, and both sides carry the same units.

Why the other options are there

• 11,926 — kept a factor of two that cancels in the correct rearrangement.
• 2,982 — dropped that same factor in the other direction.
• 6,559 — rounded an intermediate value before the final step.

Reference: FE Handbook — Dechlorination of Sulfite Compounds