How do you calculate wash-water energy cost?

Multiply the wash-water system load (kW) by operating hours by energy price. At 12 kW x 8 hr x $0.12/kWh you get $11.52 for 96 kWh of energy used.

What is the wash-water energy cost per kg of precursor?

Divide total wash energy cost by precursor washed. Here $11.52 over 1,000 kg is about $0.0115 per kg — roughly a cent per kilogram of washed precursor.

How much energy does a precursor wash cycle use?

In this example, 12 kW running 8 hours uses 96 kWh. Actual draw depends on filter-press, centrifuge, and agitator duty plus how many wash-and-repulp cycles the impurity spec requires.

Why track wash-water cost per kilogram instead of per cycle?

Per-kg cost lets you compare lines and batch sizes on equal footing and roll utility energy straight into precursor standard cost. A per-cycle figure hides differences in batch mass.

Does this include the cost of heating the wash water?

No. The calculator captures only the electrical load you enter. If you heat wash water with steam or gas, add that fuel cost separately — it often exceeds the pumping and agitation energy.

How do I lower wash-water energy cost per kg?

Improve dewatering so fewer wash-repulp cycles are needed, recover and recycle wash water, right-size pumps and agitators, and shift run hours to off-peak energy pricing.

Cathode Active Material & Precursor Manufacturing calculator

Wash Water Load Calculator

Precursor washing — removing residual sulfate, sodium, and mother-liquor salts from co-precipitated hydroxide — runs filter presses, centrifuges, agitators, and heated wash tanks that draw real power. This calculator converts the connected wash-water load and run hours into an energy bill and, critically, into a cost per kilogram of precursor washed. Process and cost engineers use it to benchmark wash circuits, justify dewatering upgrades, and allocate utility cost into precursor standard cost. Because washing is energy-intensive and tied directly to residual-impurity spec, even a fraction of a cent per kilogram compounds fast at plant scale.

What this calculator does

Estimate energy or utility cost for wash-water handling in precursor filtration, washing, neutralization, or wastewater treatment.
Use it when wash water load in cathode active material and precursor manufacturing is being quoted and energy is a real chunk of the cathode active material and precursor manufacturing cost stack.
It multiplies wash-water system load, operating hours, and energy price to get total wash energy cost, then divides by precursor washed to get cost per kilogram.

Formula used

Wash-water energy cost = wash-water system load × wash-water operating hours × energy price
Wash-water energy cost per kg precursor = wash-water energy cost ÷ precursor washed

Inputs explained

Wash-water system load:
Wash-water operating hours:
Energy price:
Precursor washed:

How to use the result

Use it when costing a wash cycle, comparing wash-circuit efficiency between lines, or allocating utility energy into precursor cost.
It models electrical energy only at a single average load — it ignores wash-water heating fuel, demineralized-water production cost, and effluent treatment, which can dwarf the pumping energy.

Current U.S. benchmarks

As of Apr 2026, industrial electricity averages 8.7 cents per kWh across the U.S. (EIA), up 5.5% from a year earlier. State averages range widely, so plants should confirm against their own tariff.

Common questions

How do you calculate wash-water energy cost? Multiply the wash-water system load (kW) by operating hours by energy price. At 12 kW x 8 hr x $0.12/kWh you get $11.52 for 96 kWh of energy used.
What is the wash-water energy cost per kg of precursor? Divide total wash energy cost by precursor washed. Here $11.52 over 1,000 kg is about $0.0115 per kg — roughly a cent per kilogram of washed precursor.
How much energy does a precursor wash cycle use? In this example, 12 kW running 8 hours uses 96 kWh. Actual draw depends on filter-press, centrifuge, and agitator duty plus how many wash-and-repulp cycles the impurity spec requires.
Why track wash-water cost per kilogram instead of per cycle? Per-kg cost lets you compare lines and batch sizes on equal footing and roll utility energy straight into precursor standard cost. A per-cycle figure hides differences in batch mass.
Does this include the cost of heating the wash water? No. The calculator captures only the electrical load you enter. If you heat wash water with steam or gas, add that fuel cost separately — it often exceeds the pumping and agitation energy.

Last reviewed 2026-05-12.