Remember when environmental protection meant obsessively sorting your trash?

Why is no one talking about it now?

Back in 2019, when Shanghai first implemented mandatory waste sorting, the entire Chinese internet was baffled by "dry" and "wet" waste. Yet, just a few years later, the topic seems to have faded from public discourse. It's not that we've forgotten, nor that the policies have been halted. The reality is that China's waste treatment technology has quietly achieved an incredible, unforeseen victory.

01 | The Silent Truth: A "Cost Shift" from Front-End to Back-End

Thinking back to a few years ago, when waste sorting was first rolled out, the momentum was immense. Public attention was focused on residential communities, right in front of every household's trash bin. But in the last couple of years, it's not just ordinary citizens who feel the topic has faded; even the media spotlight has shifted.

However, looking back from 2026, many people might have the illusion that this initiative has run its course.

Content of the image： Shanghai: Protect the Environment Starts with Waste Sorting. The "Strictest" Waste Sorting Rules Take Effect from July 1. 

Image source: Screenshot from an online video

Social media is no longer flooded with sorting guides, the number of supervisors next to community bins has decreased, and in many places, sorting requirements seem less stringent. This "cooling down" in public discourse has led many to wonder: 

Have the policies changed? Has waste sorting been abandoned?

As an enterprise long immersed in the solid waste treatment industry, the picture we see is entirely different.

This "silence" is not due to stagnation, but because the entire waste treatment system has completed a shift in focus from a "social movement" to "industrialized operations." The decrease in surface-level noise is precisely because the back-end processing systems are operating at full capacity, absorbing the previously visible social pressures into invisible industrial processes.

To understand this shift, we need to shift our gaze from the community bins and look at the monumental transformation China's waste treatment industry has undergone over the past two decades.

 

What Has Happened with Waste?

China's waste treatment history is essentially a history of technological evolution forced by sheer "volume."

Back in the early 2000s (2000-2010), China faced the problem of "cities besieged by waste." The core task was simple: just get the garbage away . Landfill was the dominant method, accounting for over 77% of treatment. Sophisticated sorting wasn't necessary; out of sight, out of mind.

The turning point came after 2011.

As environmental standards tightened and urban land became increasingly precious, the drawbacks of landfills became critical. China's waste treatment officially entered a decade-long leap in incineration capacity.

The advantages of incineration were overwhelming. It reduces waste volume by over 90% and recovers energy by using the heat to generate electricity fed into the grid. Driven strongly by policies, the capacity for household waste incineration exploded. According to Ministry of Housing and Urban-Rural Development statistics, by the end of 2022, China's daily urban household waste treatment capacity had reached a staggering 660,000 tons. For the first time, the proportion of waste treated by incineration surpassed landfill, exceeding 60%, making it the primary disposal method.

Large-scale mixed incineration was a remarkable leap in China's environmental history, efficiently safeguarding urban sanitation. However, technology and industry constantly march towards deeper resource utilization.

02 | Why Insist on Sorting When Incineration is Already Mature?

If incineration capacity is already so vast, why did the state invest enormous effort in promoting waste sorting?

This is not a denial of mixed incineration, but a necessary choice for the industry to climb the value chain after solving the basic "waste siege" crisis. When mixed treatment reaches its peak in scale, bottlenecks in further resource value extraction appear. Different waste components have vastly different economic and energy potentials.

Front-end sorting separates dry, high-calorific materials like waste plastics, textiles, and wood. Their combustion heat value can rival traditional coal. Kitchen waste can be sent for anaerobic digestion, transforming into valuable biomethane and agricultural organic fertilizer.

🔥 1 ton of thermal coal: ~5 million kcal

📄 1 ton of waste paper: ~3.5 million kcal

🌳 1 ton of waste wood: ~4 million kcal

🧥 1 ton of synthetic clothing: ~5.5 million kcal

♻️ 1 ton of waste plastic: ~8.5-10 million kcal

Front-end sorting unlocks immense resource potential at the back-end. The massive daily waste generated by China's 1.4 billion people is a valuable "urban mine." Implementing source separation is essentially the initial beneficiation of this mine. By effectively removing high-moisture kitchen waste, the remaining plastics, textiles, and wood can truly reveal their energy-rich potential. This not only significantly reduces the energy consumption of mixed treatment but also clarifies the destination of various materials, placing them at the starting line for resource circulation.

However, reaching the starting line doesn't mean they are ready for the industrial assembly line. Sorted materials still exist in bulky, complex forms, containing not only combustibles but also scrap metal, electronics, and bulky waste. Neither cement kilns seeking alternative fuels nor smelters refining recycled metals can directly process these oversized, intertwined materials. Forcing them into the process would cause severe blockages and wear.

Crossing this physical gap requires professional solid waste shredding and pre-treatment processes. Using powerful heavy machinery for forceful tearing, precise shearing, and multi-dimensional impurity removal, the structure of complex materials is completely broken down. Only after this crucial transformation step can high-calorific waste become standardized fuel, and waste equipment yield pure metal fractions. Only then do the environmental benefits of source sorting truly materialize, becoming recyclable resources that modern industry can steadily utilize.

This logic can be abstract. Let's look at practical projects to see how technology recycles even poorly sorted waste. These cases best demonstrate the essential value of the pre-treatment stage.

03 | Cases: Waste-to-Resource Utilization

Our task is to use our equipment and technology to process these difficult, inseparable "tough nuts" into sizes suitable for subsequent processes – steadily and continuously.

Only by controlling the size, separating metals, and breaking down materials can waste become truly usable fuel (RDF/SRF) or fermentation feedstock.

 

Case 01: "Agricultural Alchemy" in Bengbu, Anhui

중국 안후이성 벤부에서, 우리는 바이오메탄 액화와 탄소 포집을 통합한 세계 최초의 프로젝트에 참여했습니다.

이론적으로는 볏짚과 가축 분뇨를 처리합니다. 그러나 실제로 밭에서 수거한 볏짚은 종종 흙, 작은 돌, 심지어 버려진 농업용 비닐과 섞여 있습니다. 철저한 전처리가 없으면 이러한 불순물들이 발효 설비에 막대한 손상을 초래할 것입니다.

우리의 해머밀은 여기서 강력한 소화조 역할을 합니다. 우리는 단단한 볏짚을 분해할 뿐만 아니라 갇혀 있는 불순물도 해방시킵니다. 볏짚은 끈질기기 때문에 충분히 분쇄되지 않으면 이후 혐기성 소화 효율이 급락합니다.

결과는 의미가 큽니다: 여기서는 연간 170,000톤의 유기성 폐기물이 완전히 활용됩니다. 무엇이 되나요?

🟢 13,000톤의 액화 바이오메탄, 에너지망에 공급됩니다.

🟢 50,000톤의 유기 비료, 농지로 되돌아갑니다.

🟢 32,000톤의 산업용 액화 CO₂.

 

사례 2: 태국에서의 대체 연료 준비

동남아로 눈을 돌리면, 태국에서 우리는 현지 기업들을 위해 수십 개의 대체 연료(SRF) 제조 라인을 제공했습니다.

발전소와 시멘트 가마는 주요 에너지 소비처로 전통적으로 석탄에 의존해 왔습니다. 이제 이들은 석탄을 폐기물로 대체하려 합니다. 하지만 시멘트 가마는 연료 규격이 엄격해서, 입자가 지나치게 크면 불완전 연소가 발생하고 발열량이 낮으면 클링커 품질에 영향을 미칩니다.

이로 인해 우리의 파쇄기는 높은 출력 일관성을 요구받습니다. 이 태국 라인에서는 폐기물이 파쇄, 이송, 선별 과정을 거쳐 균일한 크기와 우수한 연소 특성을 가진 SRF로 만들어집니다.

궁극적으로, 이는 고객들이 연간 수만 톤의 석탄을 절감하는 효과를 가져옵니다. 🔥.

 

사례 3: 도시의 동맥 정비

다시 우리 주변의 도시 생활폐기물로 돌아가 보겠습니다.

생활폐기물(MSW)은 일일 배출량이 많고, 봉투 안에 무엇이 들어있는지 알 수 없습니다 — 남은 뼈, 낡은 운동화, 심지어 버려진 소형 가전제품까지.

우리의 프로젝트는 엄청난 일일 처리 압박에 직면합니다. 빠른 도시 생활과 높은 인구밀도로 인해 장비의 가동 중단은 용납될 수 없습니다. 우리의 장비는 강력하고 안정적이어야 하며, 복잡하게 혼합된 폐기물을 소각 또는 생물학적 처리에 적합한 작은 입자로 높은 처리량으로 파쇄해야 합니다.

하류의 소각로가 재료를 효율적이고 완전하게 처리할 수 있으며 다이옥신 배출이 기준 내에 머물도록 하는 것 — 이 모든 것은 신뢰할 수 있는 전처리 공정에 달려 있습니다.

04 | 기술은 최후의 방어선이지만, 유일한 해답은 아니다

실제로 현재의 폐기물 분류가 실패한 것은 아니며, 단지 더 성숙한 조정 단계에 진입했을 뿐입니다. 이 단계에서 사회적 거버넌스는 관리 비용과 효과성 사이의 균형을 모색하고, 산업 기술은 보다 적극적으로 더 많은 책임을 짊어집니다.

환경보호 장비 제조에 뿌리를 둔 기업으로서, 우리는 폐기물 자원화에 대한 고품질 솔루션과 서비스를 제공하는 데 전념하며 궁극적으로 더 나은 생활환경에 기여합니다.

폐기물 처리는 사회 전체의 협력이 필요한 복잡한 시스템 프로젝트입니다. 이 체인 내에서 산업 기술은 항상 도시 위생을 위한 최후의 방어선 역할을 합니다. 그러나 자발적인 분리수거 노력은 자원 재활용의 상한을 진정으로 결정합니다.

폐기물은 단지 잘못된 장소에 있는 자원일 뿐이며, 이를 현실로 바꾸는 열쇠는 여러분의 참여입니다.