--- title: "Water restoration for livestock lagoons | Alchemal" url: "https://alchemal.com/livestock/" description: "A manure or slurry lagoon that keeps its oxygen digests its load instead of souring under it." source: "Alchemal — alchemal.com" --- # Water restoration for livestock lagoons The lagoon digests its load instead of storing it. Your lagoon takes everything the operation sends it, day after day, and it keeps up only while the water holds oxygen. Follow the column down and watch what changes when the oxygen runs out. [Get a free assessment](https://alchemal.com/assessment/?water=lagoon) [How restoration works →](https://alchemal.com/technology/nanobubbles/) ## The load outruns the oxygen Manure arrives faster than still water can take in oxygen, so the microbes digesting it spend the supply and keep working without it, a state called anaerobic, where breakdown turns slow and sour. The meter on this water is ORP, oxidation-reduction potential, which falls below zero as the oxygen goes and keeps falling the longer the column stays without it. soured water, the oxygen spent the same lagoon, digesting its load *Modeled cross-sections of one manure lagoon, drawn to one waterline. On the left, the water has gone anaerobic: the oxygen is spent from the floor up, the dark layer marks the water that lost it first, and the load settles into sludge instead of digesting. On the right, the shore unit carries oxygen through the upper column, and the lagoon digests its load instead of storing it.* ### Crust, gas, and the smell that follows Anaerobic breakdown makes hydrogen sulfide, the gas behind the rotten-egg smell that reaches the neighbors, and it digests solids so slowly that they settle into a sludge blanket, the layer of undigested load deepening on the floor. The gas working up through the column lifts fibrous solids into a crust across the surface, which seals the water off from the air and holds the whole cycle in place. ### The lagoon gets its breath back Nanobubble oxygenation makes bubbles too small to rise, so instead of bursting at the surface within seconds they stay suspended, carrying oxygen through the upper column and holding it there. Digestion speeds up where oxygen returns, the sulfide chemistry loses the conditions it needs, and the crust thins as the gas that fed it falls away. ### Digesting instead of storing With the upper column held aerobic, the lagoon digests its load instead of storing it. The odor falls off, the sludge blanket stops gaining depth, and the capacity that comes back protects your freeboard, the margin between the water surface and the top of the berm, through the months when pumping down has to wait. ## The mechanism on this water A working lagoon is a digester, and digestion runs on oxygen. When the load coming in outruns what still water can take in at the surface, the microbes doing the work go anaerobic, meaning they keep breaking the load down without oxygen, and that turn changes everything an operator lives with: the breakdown slows, so solids settle into a sludge blanket that eats storage capacity; the chemistry shifts, so hydrogen sulfide, the rotten-egg gas, forms and carries; and the gas working upward lifts a crust that seals the surface against the air. Nanobubble oxygenation, oxygen in bubbles small enough to stay suspended instead of rising and bursting, carries dissolved oxygen through the upper column, holds it there, and adds nothing else, so digestion keeps pace with the load instead of banking it. The [technology pages](https://alchemal.com/technology/nanobubbles/) lay the mechanism out, and [how we measure](https://alchemal.com/technology/how-we-measure/) shows the standard every claim on this site is held to. For lagoon odor control, the same aerobic column that slows the sludge stops the smell at its source, and [how it compares with surface aeration](https://alchemal.com/technology/nanobubbles-vs-aeration/) shows where each one fits. ## What the published work shows +25.6% methane output In laboratory anaerobic digestion, air nanobubbles raised methane output 25.6 percent by speeding the breakdown of organic solids. [Lyu et al., *Bioresource Technology Reports*, 2024](https://doi.org/10.1016/j.biteb.2024.101939) A laboratory digestion test on pre-treated sewage sludge, not an on-farm manure lagoon, and carbon dioxide nanobubbles outperformed air. It shows the reach of the mechanism, not what an Alchemal lagoon unit does. We are looking for farms willing to help evaluate this on a working lagoon, and to publish the record either way. These findings describe nanobubble oxygenation as a mechanism, not an Alchemal unit. Our own installations publish their records as case files as they go in. ## The problems we treat here - [Lagoon odor and sludge: keep the column aerobic Odor complaints, crusting, and sludge that makes pumping harder. One anaerobic cause sits behind all three.](https://alchemal.com/problems/lagoon-odor-sludge/) - [Why a lagoon sours: the anaerobic turn and hydrogen sulfide A sour, rotten-egg smell off the lagoon means the water has gone anaerobic and is making hydrogen sulfide. See how keeping the upper column aerobic shifts the breakdown back.](https://alchemal.com/problems/lagoon-anaerobic-souring/) - [Lagoon surface crust and lost freeboard: the anaerobic column beneath A hardening surface crust that traps gas, fouls pumping, and eats into freeboard sits over an anaerobic column. See how oxygen addresses the biology beneath the mat.](https://alchemal.com/problems/lagoon-surface-crust/) - [Lagoon sludge and lost capacity: the slow anaerobic digest Sludge that eats capacity and makes each pump-out harder is the load an anaerobic lagoon never finished digesting. See how oxygen speeds the breakdown so less settles.](https://alchemal.com/problems/lagoon-sludge-capacity-pumpout/) - [Lagoon BOD and nutrient load: readings a permit turns on BOD and nutrient readings are what a lagoon permit turns on, and an anaerobic lagoon runs them high. See how an aerobic column brings the biological load down, measured against a baseline.](https://alchemal.com/problems/lagoon-bod-nutrient-permits/) - [Algae on a lagoon surface: the conditions behind it A lagoon surface that greens up in the heat is warm, still, and fed by an oxygen-poor bottom. See how restoring oxygen through the column shifts the balance back.](https://alchemal.com/problems/lagoon-surface-algae/) - [The lagoon treadmill: agitate, haul, mask, repeat Agitating, hauling, and masking come back every season because they treat symptoms of one anaerobic cause. See how an aerobic column slows the work coming back.](https://alchemal.com/problems/lagoon-agitation-hauling-treadmill/) ## From the field notes - [Understanding your water How to read an ORP curve on a working lagoon Oxidation-reduction potential (ORP) tracks the chemistry behind a lagoon odor: a negative curve means sulfide, a rising one means the smell is receding.](https://alchemal.com/field-notes/reading-an-orp-curve-on-a-lagoon/) ## Who we serve - [Lagoon operators Neighbor complaints, inspector visits, a crust that means pumping problems. A lagoon that's gone anaerobic makes itself everyone's business. You have zero patience for marketing, which suits us.](https://alchemal.com/livestock/who-we-serve/lagoon-operators/) - [Dairy operations A dairy moves water every day, and the lagoon takes the alley flush and the parlor washdown along with the manure. When it sours, the odor reaches the neighbors, the crust and sludge slow the pumping you schedule around cropping, and the nutrients you count on for the fields get harder to read.](https://alchemal.com/livestock/who-we-serve/dairy-operations/) - [Swine operations On a hog operation the lagoon is the part the neighbors notice. When it sours, the odor carries on a still evening and the complaint calls follow, and the hydrogen sulfide that builds under a crust becomes a safety matter every time you agitate or pump.](https://alchemal.com/livestock/who-we-serve/swine-operations/) - [Cattle and feedlot operations A feedlot's runoff holding pond takes a solids-heavy load off the pens, and it shows: a hardening crust, a sludge blanket that climbs, and pumping that gets harder every season. When it sours, the odor and the readings become the regulator's business along with yours.](https://alchemal.com/livestock/who-we-serve/cattle-feedlot-operations/) ## The N-Series fit The [N-Series](https://alchemal.com/technology/n-series/) is one platform, sized by the volume of water it has to oxygenate rather than by the kind of operation. Lagoon work usually lands on the [N4](https://alchemal.com/technology/n-series/n4/), sized for working lagoons of 1-10 acres carrying high organic loads, with staged throttling and a record built for inspection. A smaller runoff pond or a single-cell lagoon can step down the range. An assessment sizes the unit to the water and where it installs. ## How it works 1. 1 ### Tell us about your water Describe the problems you are facing, and we work with you to find out whether Alchemal is the right solution for your water. [How the assessment works →](https://alchemal.com/assessment/) 2. 2 ### Install the unit The N-Series unit goes in at your water and gets to work: oxygen through the whole column, and sensors that let you watch the response. [The N-Series line →](https://alchemal.com/technology/n-series/) 3. 3 ### Partner for the long term We stay with you to keep the water improving, the unit running well, and the results where you want them. [What Stewardship covers →](https://alchemal.com/stewardship/) [Get a free assessment →](https://alchemal.com/assessment/) ## Tell us what your water is doing. Describe what you are seeing, and a specialist will help you determine whether Alchemal can help you fix it, before any commitment. [Get a free assessment](https://alchemal.com/assessment/?water=lagoon) [How restoration works](https://alchemal.com/technology/)