Is it permissible to write a Qur'anic verse on sewage trucks?

The Quran must be kept pure and protected from dirty or degrading places. Whoever does this intentionally and mockingly has apostatized from Islam. Therefore, placing the Quran in a dirty place is a major act of disbelief (kufr akbar) that expels one from the fold of Islam. Placing the Quran on vehicles carrying dirt is rejected by the Sharia and abhorred by natural inclination. Thus, a Muslim must keep their noble Book pure and uphold the sanctity of Allah's prohibitions.