[Transformation characteristics of carbon, nitrogen, phosphorus and sulfur during thermal hydrolysis pretreatment of sludge with high solid content].
The transformation characteristics of carbon, nitrogen, phosphorus and sulfur in dewatering sludge from municipal wastewater treatment plant (WWTP) were investigated after thermal hydrolysis pretreatment at 165 degress C for 50 min. The results showed that the hydrolysis efficiency of VSS could reach as high as 43.35%, 54.36% of protein and 65.12% of carbohydrate were transferred to dissolved organics, respectively, and the main component of dissolved organic matter in hydrolysate was dissolved protein (52.18% ), 54.23% of insoluble organic nitrogen was turned into dissolved nitrogen and 22.13% of dissolved nitrogen in hydrolysate was converted to ammonia. The transformation rate of insoluble phosphorus was 30.52%. Dissolved phosphorus was mostly transformed to phosphate (79.84%) as phosphorus-accumulating bacteria cells were crushed. 50.03% of insoluble organic sulfur was hydrolyzed, and little change was detected in sulfide (0.50%). The analysis results of the organic compounds transformation are valuable for treatment of the thermal hydrolysis pretreated sludge with high solid content.
Yang
Y
Zhuo
Yun
Y
Han
Yao
Y
Cheng
Dang-Cong
DC
Peng
Yu-You
YY
Li
D000641:Ammonia / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D006868:Hydrolysis; D009584:Nitrogen / Q000737:chemistry; D009930:Organic Chemicals / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry
D000641:Ammonia; D002244:Carbon; D009584:Nitrogen; D009930:Organic Chemicals; D010758:Phosphorus; D012722:Sewage; D013455:Sulfur; D062065:Wastewater