1. Ụkpụrụ nke ime ihe nzacha biological anaerobic
1) Ntucha: onye na-ekpuchi ihe na-egbochi ma na-enyocha nnukwu akụkụ na ihe ndị a kwụsịrị na mmiri ntinye;
2) Hydrolysis: microorganisms anaerobic nwere ike ime ka ihe ndị na-adịghị ike nke macromolecules ghọọ ihe soluble nke obere ụmụ irighiri ihe;
3) absorption: anaerobic microorganisms adsorb na banye organic pollutants na mmiri, nke a na-eji akụkụ nke onwe ha uto na mmeputakwa, na akụkụ nke na-achichi si site U-ụdị mmiri n'ụdị biogas;
4) Denitrification: A na-eweghachi ihe na-esi na akwa oxidation kọntaktị na nzacha anaerobic, na nje bacteria na-agbapụ na microorganisms anaerobic nwere ike iji nitrogen nitrate na mmiri reflux ma gbanwee ya na nitrogen iji wepụ nitrogen na nsị. Mgbe ọgwụgwọ nke nsị nke ime obodo site na nzacha anaerobic, a na-ebelata mkpokọta nke ihe ndị siri ike kwụsịtụrụ, ihe ndị na-emerụ emerụ na nitrogen, na-ebelatakwa ibu kọntaktị oxidation bed na-esote.
2. Ụkpụrụ nke ọrụ nke kọntaktị oxidation bed
1) Adsorption: microorganisms aerobic na-etolite biofilms nwere nnukwu ebe dị elu na ntinye uche dị elu n'oge uto na usoro mmeputakwa nke ihe nkpuchi, nke nwere ike ime ka ọtụtụ n'ime ihe ndị na-emerụ emerụ na mmiri na mmiri dị ukwuu ma belata nsị na-emerụ emerụ;
2) Ingestion na decomposition: N'ihe banyere ikuku na-aga n'ihu na-erugharị na reactor, aerobic microorganisms nwere ike iburu ihe ndị na-emerụ emerụ na-edozi ahụ n'ime ahụ dị ka nri na metabolize ha, nke a na-eji akụkụ ya maka uto na mmepụta nke onwe ha, na akụkụ nke ya. a na-agbanwe ka ọ bụrụ carbon dioxide na mmiri. Ikpughe ihe ndina hydrogenated na-ebelata ntinye nke ihe ndị na-emetọ mmiri na nsị nke ime obodo, na mwepụ nke CODcr na BOD5 n'ime ikuku ruru ihe karịrị 80%, nke nwere ike iru ụkpụrụ nke abụọ nke mba maka nsị nsị.