接种高温菌剂的生活垃圾好氧堆肥处理

Domestic Waste Composting with Complex Thermophilic Microbial Inoculation

接种适用于 70～ 80℃高温环境的高效微生物菌剂 ,进行中试规模的城市生活垃圾高温好氧堆肥处理试验研究 ,为上海市某区 50 0t·d- 1生活垃圾的产业化处理处置提供技术路线 .研究表明 ,接种高温菌剂的堆肥初始升温速度快 ,前 8h温度升高 3 7℃ ,而对照组前 13h堆肥温度仅升高 5℃ ;接种堆肥在前 3d高温期温度达到 80～ 85℃ ,有机物去除质量分数 19.2 % (前 3d) ,第 3d好气性异养细菌仍保持在 10 10 数量级 ;而对照组前 3d高温期的温度变化范围为 65～ 70℃ ,有机物去除质量分数为 11.9% (前 3d) ,第 3d好气性异养细菌降为 10 9数量级 ;接种堆肥较对照组发酵周期明显缩短 ,一次发酵缩短 3～ 4d ,二次发酵缩短了 6～ 7d .表明高温菌剂的投加 ,增强了微生物生态系统的功能 。

To effectively dispose the urban domestic wastes,500 t·d -1 from some districts in Shanghai,aerobic composting o perations were carried out in a moderate test scale,inoculating self-developed thermophilic bacteria which could metabolize normally under high temperatures of 70～80 ℃,while composting without inoculation was accompanied.Results showed that the inoculation composting had a faster rise in starting temperature,a rese of 37 ℃ for the first eight hours,but only a 5 ℃ rise within the first thirte en hours for the composting without inoculation.During the initial three days,th e inoculation composting reached higer temperatures from 80 ℃ to 85 ℃,decompo sition extent was 19.2 percent,and viable count of aerobic heterotrophic bacteri a recovered on agar plates kept 10 10 CFU·g -1 ,(CFU, abbreviation for colony forming unit) cultured separately at 28 ℃ for the first day and at 80 ℃ for the third day.While the compared composting had a temperat ure variation from 65～70 ℃ during the first three days,the biodegradable exten t of organic materials was 11.9 percent,and the viable count of aerobic heterotr ophic bacteria recovered on agar plates decreased to 10 9 CFU· g -1 ,cultured at 70 ℃ for the third day compared with the staring count for 10 10 CFU·g -1 at 28 ℃ culture.The inoculation composting period had been shorten by 3～4 days for the first stage and 6～7 day s for the second stage compared with the noninoculation one.With the help of the rmophilic bacteria inoculation, the first stage of the composting process could be operated effectively under high temperatures of 70～80 ℃.