Composting toilets don&#x27;t need water either.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Composting_toilet" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Composting_toilet</a><p>Alternatively, just try to divert urine so it never mixes in the first place:<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Urine-diverting_dry_toilets" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Urine-diverting_dry_toilets</a><p>Both of these seem on first glance to be easier to maintain.