水产废弃物水热处理过程重金属迁移转化特性及机理研究

Fishery waste has a higher water content and some fish heads, fish fins, fish innards have higher heavy metals level such as mercury, zinc, copper, especially as the focus of future biomass utilization of aquatic biomass, among which heavy metals level is much higher. The inherently high moisture content of biomass is the disadvantage for many treatment processed, because prior drying brings about high operating costs. Thus, water content and heavy metals are the important limiting factors that affect the treatment process of biomass..This study is mainly based on experimental research, analysis the characteristics and various fertilizer indicators, TOC and pH of the solid-liquid phase samples after hydrothermal treatment. Meanwhile combined with the formation mechanism of technology mechanism, analysis the influence of soli-liquid component of treatment temperature, treatment time and pressure, the migration of heavy metals and the effect of salt of fish waste. Implementation of this project not only can be clarified the process mechanism of hydrothermal treatment on fishery waste and develops new method for fish waste treatment, but also provides guidance to the preparation of application new method.

水产物内脏、头足等富集Hg、Pb、Cd、Cr等重金属，限制了水产废弃物在有机肥及饲料的资源化利用。水热处理技术用于污泥重金属脱除表现出优良效果，因此，本项目应用水热处理技术，研究水热处理水产废弃物过程中重金属迁移转化特性及其过程调控。通过水热过程机理研究，分析不同处理条件（温度、滞留时间及压力）下水热转化变化及其过程参数。明确不同处理条件对回收产物特性的影响关系，以及处理条件对回收物固液中重金属的迁移及稳定性的影响关系。阐明水产废弃物水热处理产物的转化特性和各类肥效指标等变化。项目的顺利实施不仅阐明水产废物水热处理机理，还提出一套水产废物处理新工艺，并为今后高含水量生物质水热处理工艺提供相应理论依据。

水产物内脏、头足等富集Hg、Pb、Cd、Cr等重金属，限制了水产废弃物在有机肥及饲料的.资源化利用。水热处理技术用于污泥重金属脱除表现出优良效果，因此，本项目应用水热处理.技术，研究水热处理水产废弃物过程中重金属迁移转化特性及其过程调控。通过水热过程机理.研究，分析不同处理条件（温度、滞留时间及压力）下水热转化变化及其过程参数。明确不同.处理条件对回收产物特性的影响关系，以及处理条件对回收物固液中重金属的迁移及稳定性的.影响关系。阐明水产废弃物水热处理产物的转化特性和各类肥效指标等变化。项目的顺利实施.不仅阐明水产废物水热处理机理，还提出一套水产废物处理新工艺，并为今后高含水量生物质.水热处理工艺提供相应理论依据。