Kuwongolera kwa Solids ndi njira yomwe imagwiritsidwa ntchito pobowola zida zomwe zimagwiritsa ntchito madzi obowola. Kumaphatikizapo kulekanitsa "zodulidwa" (zobowola) kuchokera kumadzimadzi, kulola kuti atengedwenso kapena kutayidwa ku chilengedwe.[1]
Dongosolo lowongolera zolimbitsa thupi limagwiritsidwa ntchito pobowola mafuta ndi gasi wamamita 1000-9000 ndipo imakhala ndi akasinja atatu mpaka 7 ophatikizidwa. Pansi pa thanki yoyeretsera imatenga mawonekedwe atsopano a cone, pomwe m'mphepete mwake mumatengera dongosolo losakaniza matope lomwe sikophweka kuyika mchenga. Kuti akwaniritse zofunikira pakubowola, njira yonse yozungulira imatha kupatulidwa ndikulumikizidwa pakati pa tanki ndi tanki kapena pakati pa nyumba yosungiramo zinthu ndi nyumba yosungiramo zinthu, pakati pawo valavu yapansi ya manifold suction imatseguka mosinthika ndikusindikizidwa modalirika ikatseka. Dongosolo lonse lozungulira limapangidwa ndi zida zoyeretsera zamtundu wa 5, shale shaker mu zida zofananira, desand ndi desilt zotsukira, vacuum degasser ndi agitator etc. Kugwiritsa ntchito mafuta atsopano pobowola matope kuyeretsa kumachepetsa utsi wamatope ndi ntchito yodziwikiratu yoteteza chilengedwe.
Solids control system imagwiritsidwa ntchito kulekanitsa ndi kusamalira zinyalala ndi mchenga etc tinthu mu kubowola madzimadzi, kusunga pobowola madzimadzi ntchito ndi kusunga kufalitsidwa pobowola madzimadzi. Ili ndi zida zophatikizira zolemetsa, zida zolowetsera ndi zida zodzaza ndi mankhwala, zomwe zimagwiritsidwa ntchito kupititsa patsogolo magwiridwe antchito amthupi ndi mankhwala amadzimadzi obowola kuti akwaniritse zofunikira pakubowola.
Solids control system yopangidwa ndiHERIS, imakhala ndi mawonekedwe apamwamba, ntchito yodalirika, kuyenda kosavuta komanso ntchito zachuma. Kuchita bwino ndi kupanga kwadongosolo lathunthu lakhazikitsidwa kwafika pamlingo wapamwamba wamtundu womwewo wazinthu zapakhomo.