The Isotherm Studies of Adsorbent Development from Pulogadung Primary Sewage Sludge (PS) with Rice Straw Addition by Hydrothermal

Abstract

The rapidly amount of primary sludge (PS) by pass production from wastewater treatment plant becomes problematic worldwide due to the release of some toxic substances from PS if directly dispose to the landfill. Hydrothermal treatment (HTT) has been reported to be able to immobilize heavy metals and generated bio-char, and silicate-based minerals for the potential development of adsorbent.This study investigated the feasibility of adsorbent development from HTT sludge and also addition of rice straw then tested the performance of the developed adsorbent for ammonia removal from synthetic ammonia wastewater. Rice straw (RS) addition can enhance ammonia adsorption capacity of all the developed adsorbents (HTT150+RS; HTT175+RS; HTT200+RS). The maximum ammonia adsorption capacity for developed adsorbents (HTT150+RS; HTT175+RS; HTT200+RS) were approximately 37-40 mg-N/g-SS, about 70-80 % of ammonia adsorption capacity of zeolite used in this work. The Hydrothermal of PS + RS indicates is a potential bio-sorbent.