Comparison of Coal-, Coconut-, and Wood-Based Activated Carbons for Removal of Organic Matters in Wastewater Treatment Plant Effluent

Abstract

Objectives : This study investigated the removal of dissolved organic materials by coal-, coconut-, and wood-based activated carbons to assess the addition of an activated carbon process to a publicly owned treatment works (POTW).Methods : We assessed the removal of total organic carbon (TOC) by each process in the POTW, and examined the removal of TOC and UVA254 upon adding different amounts of coal-, coconut- and wood-based activated carbons (50, 100, 200, 300, and 400 mg/L) with various contact time (10, 20, 30, 60, 120 min).Results and Discussion : Approximately 80% of TOC was removed throughout the POTW compared to the influent. The activated carbon adsorption tests of coagulated wastewater revealed that the removal rate of TOC and UVA254 from coal-based activated carbon was higher than those of coconut-based and wood-based activated carbons. The removal rate of dissolved organic materials was highest in ozone treated wastewater in all types of activated carbons, followed by ultraviolet disinfected wastewater and coagulated wastewater.Conclusions : It was possible to remove an additional 35-55% of dissolved organic materials upon addition of activated carbon to the treated wastewater although the removal depends on the material of the activated carbon, the injection amount, and the contact time. If an activated carbon process is adopted to the POTW, it can meet the effluent water quality standards (TOC).

Improving Stormwater Runoff Quality using Wasted activated Carbon from a Household Water Purifier

“…이온의 표면 개질을 통해 화학적 활성을 증 가시켜 음전하를 띄는 다양한 오염물질에 대한 흡착성능이 향상이 영향을 준 것으로 보인다 [23][24][25]. 염화물의 평균 제거율 은 99.3%으로 처리 전보다 약 28.4% 향상되었으며, 함침 용액으로 표면 개질 및 초음파 처리를 동시에 진 행하였을 때 모든 수질항목에서 가장 높은 제거효율을 보여주 었으며, 7:3(GAC:WGAC) 혼합 입상활성탄과 비교하였을 때, 총대장균군수 11.8%, 염화물 29.2%, BOD 12.1%, T-P 20.3%, 탁도 13.2% 제거효율이 향상되었으며, T-N은 19.4% 감소되 었다.…”