Humans contribute to nitrogen and phosphorus loads primarily through wastewater inputs and runoff from agricultural, urban, and residential land. However, many exceptions to these trends exist. Nitrogen supplies tend to be limited in marine waters, and phosphorus supplies tend to be limited in freshwaters. Nitrogen and phosphorus are the nutrients most likely to be in short supply relative to demand, and by Liebig’s law of the minimum, are the primary growth-limiting nutrients. Limited supplies of light or nutrients can slow or stop cell division, preventing bloom formation. Like terrestrial plants, phytoplankton require sunlight and inorganic nutrients to produce new biomass. The total rate of cell loss is driven by three mechanisms: mortality, dilution, and sedimentation. The division rate, also called the intrinsic growth rate, is the rate of new cell production. The net growth rate can be described asĮquation 1: Net Growth = Division – Mortality – Sedimentation – Dilution. Phytoplankton come in many shapes and sizes.įor a phytoplankton bloom to occur, the net growth rate of a population must be positive for enough time to build a high biomass level. I have a game currently where I am keeping a closed room with 2 coal generators at 27c simply by using a a P-water radiator to passively leach the heat out for the price of a liquid pump.Figure 1. I prefer doing this early game as there are more ways to use waste heat from batteries and other core processes to heat the water up if I need it than there are wheeze warts for cooling hot water down.Īlso worth mentioning water and particularly polluted water make fantastic heat exchangers in their own right - P-water boils at 120c meaning it can absorb 1/5 more heat before vapourising. Both slime lung and food poisoning die off at 0c so making a "ununununu" pipe radiator snake around a cold biome will drop the temperature to well below freezing even with basic sandstone pipes, if you then store the liquid in a reservoir there you end up with germ free water. If you then need to run this through your main inhabited area it will require thought to prevent the waste heat from becoming an issue,even more so if occurring or passing near your mealworm farms.Īn alternative is to use a cold biome. The issue with the liquid tepidizer is you also have to deal with the the waste heat, if you do go down that path you can use a liquid seive to drop the temperature to 40c. The chlorine room is relatively easy to set up, and can take a full input of 2 sieves, easily processing the entirety of waste water from a colony of 32 in a 6x4 or 8x4 tile room.Īlthough this sounds complicated, it's much easier to set up than a tepidizer, much more power-efficient, and it produces no heat or waste product outside of the sieve. This whole process can be easily automated by timing it with a daylight cycle sensor. I recommend doing even a third shutoff germ detection, to get any excess from pipes out of the output, just in case any slipped by the germ sensor filtering. From here, all dirty water is free of germs. If not, override the liquid shutoff and send them back into the purifying loop for the next round. If any germs are detected, send the cleaned water one direction. Attach a germ sensor within this loop, into another liquid shutoff. This is unavoidable, as pipes do not interact with Chlorine to purify their contents. This will give the germs time to die before more is added into the system.įrom here, there will be germs in the small amount of piping coming off of the reservoir and into the liquid shutoff. Once you've got a flow into the reservoir, use automated or manual liquid valves (preferably liquid shutoff) to stop the flow of infected water into the reservoir once it's slightly filled. This interacts with its gaseous environment, including the antiseptic properties of Chlorine gas.įirst, set up a flow of polluted water or sieved toilet water (or water that's been vomited or urinated into) into a liquid reservoir. You need to use a liquid reservoir, a more recent addition to the game. Chlorine CAN purify literally tons water in less than a cycle!
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